SOUTHERN PERU LTD
S-4/A, 1997-10-06
METAL MINING
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<PAGE>   1
 
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 6, 1997
    
 
   
                                                      REGISTRATION NO. 333-34305
    
================================================================================
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
   
                                AMENDMENT NO. 1
    
   
                                       TO
    
 
                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
   
                        SOUTHERN PERU COPPER CORPORATION
    
                             SOUTHERN PERU LIMITED
          (EXACT NAMES OF REGISTRANTS AS SPECIFIED IN THEIR CHARTERS)
 
<TABLE>
<S>                                   <C>                                   <C>
               DELAWARE                                6719                               13-3849074
               DELAWARE                                1021                               13-5644139
    (STATES OR OTHER JURISDICTIONS         (PRIMARY STANDARD INDUSTRIAL     (I.R.S. EMPLOYER IDENTIFICATION NOS.)
  OF INCORPORATION OR ORGANIZATION)        CLASSIFICATION CODE NUMBERS)
</TABLE>
 
                            ------------------------
 
                                180 MAIDEN LANE
                            NEW YORK, NEW YORK 10038
                                 (212) 510-2000
              (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
              INCLUDING AREA CODE, OF PRINCIPAL EXECUTIVE OFFICES)
 
                        SOUTHERN PERU COPPER CORPORATION
                             SOUTHERN PERU LIMITED
                                180 MAIDEN LANE
                            NEW YORK, NEW YORK 10038
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
 
                            ------------------------
 
   
                                   COPIES TO:
    
 
<TABLE>
<S>                                           <C>
            AUGUSTUS B. KINSOLVING                         E. WAIDE WARNER, JR.
       SOUTHERN PERU COPPER CORPORATION                   DAVIS POLK & WARDWELL
            SOUTHERN PERU LIMITED                          450 LEXINGTON AVENUE
               180 MAIDEN LANE                           NEW YORK, NEW YORK 10017
              NEW YORK, NY 10038                              (212) 450-4000
                (212) 510-2000
</TABLE>
 
     APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this registration statement becomes effective.
                            ------------------------
 
   
     THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.
    
 
================================================================================
<PAGE>   2
 
     INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
     REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
     SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR
     MAY OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT
     BECOMES EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR
     THE SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE
     SECURITIES IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE
     UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS
     OF ANY SUCH STATE.
 
   
                  SUBJECT TO COMPLETION, DATED OCTOBER 6, 1997
    
PROSPECTUS
          , 1997
 
                               OFFER TO EXCHANGE
   
                 7.90% SERIES A-1 SECURED EXPORT NOTES DUE 2007
    
    FOR ANY AND ALL OUTSTANDING 7.90% SERIES A SECURED EXPORT NOTES DUE 2007
                                       OF
 
                             SOUTHERN PERU LIMITED
                Payment of Principal and Interest Guaranteed by
                        SOUTHERN PERU COPPER CORPORATION
                  THE EXCHANGE OFFER WILL EXPIRE AT 5:00 P.M.,
            NEW YORK CITY TIME, ON                , UNLESS EXTENDED
 
   
     Southern Peru Limited ("SP Limited" or the "Issuer"), hereby offers, upon
the terms and subject to the conditions set forth in this Prospectus and the
accompanying Letter of Transmittal (which together constitute the "Exchange
Offer"), to exchange $1,000 principal amount of 7.90% Series A-1 Secured Export
Notes due 2007 (the "New Notes") for each $1,000 principal amount of the issued
and outstanding 7.90% Series A Secured Export Notes due 2007 (the "Old Notes"
and, together with the New Notes, the "Notes"). New Notes shall be issued in
denominations of $250,000 and integral multiples of $1,000 in excess thereof. As
of the date of this Prospectus, there were outstanding $150,000,000 principal
amount of Old Notes. The terms of the New Notes are identical in all material
respects to the Old Notes, except that the offer of the New Notes will have been
registered under the Securities Act of 1933, as amended (the "Securities Act")
and, therefore, the New Notes will not be subject to certain transfer
restrictions, registration rights and related additional interest provisions
applicable to the Old Notes. This Prospectus and Letter of Transmittal will be
first sent to all holders of Old Notes on or about                , 1997.
    
 
     The Notes will be senior direct obligations of the Issuer and its Peruvian
Branch, (the "Branch") and will be secured by the proceeds of Dollar-denominated
Export Receivables (as defined herein) in respect of copper sales occurring
after the date of issuance of the Old Notes (the "Issue Date"), by SP Limited to
copper purchasers primarily under annual sales contracts. Payment of principal
of, and interest on, the Notes will be fully and unconditionally guaranteed as
described herein by Southern Peru Copper Corporation ("SPCC", "Southern Peru" or
the "Company"), which conducts its operations exclusively through its
wholly-owned subsidiary, SP Limited.
 
   
     The New Notes will bear interest from           , 1997 (the "Interest
Date"). Holders of Old Notes whose Old Notes are accepted for exchange will be
deemed to have waived the right to receive any payment in respect of interest on
the Old Notes accrued from the Interest Date to the date of the issuance of the
New Notes. Interest on the New Notes is payable monthly in arrears on the 30th
day of each month (or the 28th day of February), accruing from the Interest
Date. Principal will be payable in monthly installments on such dates pursuant
to a level debt service schedule, commencing on June 30, 2000. Payments of
interest and principal and Additional Amounts (as defined herein), if any, will
be made by SP Limited or its Branch. See "Description of Notes -- Payments".
Payments on the Notes will be made after deduction and withholding for, or on
account of, Peruvian Tax (as defined herein), currently 1% and SP Limited or its
Branch will pay Additional Amounts in respect of such Peruvian Tax or will pay
such Peruvian Tax directly, subject to certain exceptions. Such exceptions
include that neither SP Limited nor its Branch will pay Additional Amounts
attributed to Peruvian Tax, currently 30%, with respect to Notes held by persons
that are individuals or estates. See "Description of Notes -- Payment of
Additional Amounts" and "Taxation -- Peruvian Taxation".
    
 
     The final maturity date for the Notes will be May 30, 2007, unless
previously redeemed. The Notes will be redeemable, in whole or in part, at any
time at 100% of the principal amount thereof then outstanding, plus accrued
interest and a Make-Whole Premium (as defined herein). The Notes will also be
redeemable, in whole or under certain circumstances in part, at 100% of their
principal amount then outstanding, plus accrued interest and Additional Amounts,
if any, in the event that Peruvian Tax over 1%, or Additional Amounts attributed
thereto, are payable by SP Limited or the Branch or SPCC for any reason. Any
such redemptions will be at the option of SP Limited or SPCC. See "Description
of Notes -- Optional Redemption for Tax Reasons".
                                                        (continued on next page)
                            ------------------------
     SEE "RISK FACTORS" BEGINNING ON PAGE 23 FOR A DISCUSSION OF CERTAIN RISK
FACTORS THAT SHOULD BE CONSIDERED BY HOLDERS PRIOR TO TENDERING THEIR OLD NOTES
IN THE EXCHANGE OFFER.
                            ------------------------
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
<PAGE>   3
 
(cover page continued)
 
     The New Notes are being offered hereunder in order to satisfy certain
obligations of the Issuer under the Registration Rights Agreement, dated May 30,
1997, among the Issuer and the other signatories thereto (the "Registration
Rights Agreement"). Based upon interpretations contained in letters issued to
third parties by the staff of the Securities and Exchange Commission (the
"Commission"), the Issuer believes that New Notes issued pursuant to the
Exchange Offer in exchange for Old Notes may be offered for resale, resold and
otherwise transferred by each holder thereof (other than a broker-dealer, as set
forth below, and any such holder which is an "affiliate" of the Issuer within
the meaning of Rule 405 under the Securities Act) without compliance with the
registration and prospectus delivery provisions of the Securities Act, provided
that such New Notes are acquired in the ordinary course of such holder's
business and such holder has no arrangement or understanding with any person to
participate in the distribution of such New Notes. Eligible holders wishing to
accept the Exchange Offer must represent to the Issuer in the Letter of
Transmittal that such conditions have been met. Each broker-dealer that receives
New Notes for its own account pursuant to the Exchange Offer must represent that
the Old Notes tendered in exchange therefor were acquired as a result of
market-making activities or other trading activities and must acknowledge that
it will deliver a prospectus in connection with any resale of such New Notes.
The Letter of Transmittal states that by so acknowledging and by delivery of a
prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act. This Prospectus, as it
may be amended or supplemented from time to time, may be used by a broker-dealer
in connection with resales of New Notes received in exchange of Old Notes where
such Old Notes were acquired by such broker-dealer as a result of market-making
activities or other trading activities. The Issuer has agreed that, for a period
of 90 days after the consummation of the Exchange Offer, it will make this
Prospectus available to any broker-dealer for use in connection with any such
resale. See "Plan of Distribution".
 
     The Issuer will not receive any proceeds from the Exchange Offer. The
Issuer will pay all the expenses incident to the Exchange Offer. Tenders of Old
Notes pursuant to the Exchange Offer may be withdrawn at any time prior to the
Expiration Date (as defined herein). In the event the Issuer terminates the
Exchange Offer and does not accept for exchange any Old Notes, the Issuer will
promptly return tendered Old Notes to the holders thereof. See "The Exchange
Offer".
 
   
     Prior to this Exchange Offer, there has been no public market for the
Notes. The Issuer does not currently intend to list the New Notes on any
securities exchange or to seek approval for quotation through any automated
quotation system. There can be no assurance that an active public market for the
New Notes will develop.
    
 
     By tendering their Old Notes, each holder participating in the Exchange
Offer will be deemed to have consented, under the Registration Rights Agreement
(as defined herein) and the Amended and Restated Collateral Trust Agreement (as
defined herein), to the changes made in the Second Amended and Restated
Collateral Trust Agreement (as defined herein). See "Description of Notes -- The
Amended and Restated Collateral Trust and Security Agreement".
<PAGE>   4
 
                             AVAILABLE INFORMATION
 
     This Prospectus constitutes a part of a registration statement (the
"Registration Statement", which term shall encompass any amendments thereto)
filed with the Commission under the Securities Act. As permitted by the rules
and regulations of the Commission, this Prospectus does not contain all of the
information contained in the Registration Statement and the exhibits and
schedules thereto and reference is hereby made to the Registration Statement and
the exhibits and schedules thereto for further information with respect to the
Issuer and the securities offered hereby. Statements contained herein concerning
the provisions of any documents filed as an exhibit to the Registration
Statement or otherwise filed with the Commission are not necessarily complete,
and in each instance reference is made to the copy of such document so filed.
Each such statement is qualified in its entirety by such reference.
 
     SPCC is subject to the informational requirements of the Exchange Act, and
in accordance therewith, files reports, proxy statements and other information
with the Commission. Such reports, proxy statements and other information can be
inspected and copied at the public reference facilities of the Commission at
Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549 and at the regional
offices of the Commission located at 7 World Trade Center, 13th Floor, Suite
1300, New York, New York 10048 and Suite 1400, Citicorp Center, 14th Floor, 500
West Madison Street, Chicago, Illinois 60661. Copies of such material can also
be obtained at prescribed rates by writing to the Public Reference Section of
the Commission at 450 Fifth Street, N.W., Washington, D.C. 20549. Such
information may also be accessed electronically by means of the Commission's
home page on the Internet (http://www.sec.gov). In addition, such reports, proxy
statements and other information concerning SPCC can be inspected at the offices
of the New York Stock Exchange, Inc., 20 Broad Street, New York, New York 10005
on which exchange equity securities of SPCC are listed.
 
                    INCORPORATION OF DOCUMENTS BY REFERENCE
 
     This Prospectus incorporates by reference thereto and makes a part hereof
the following documents heretofore filed with the Commission pursuant to the
Exchange Act: (i) SPCC's Annual Report on Form 10-K for the fiscal year ended
December 31, 1996, (ii) SPCC's Quarterly Report on Form 10-Q for the quarter
ended March 31, 1997, and (iii) SPCC's Quarterly Report on Form 10-Q for the
quarter ended June 30, 1997. All documents filed by SPCC pursuant to Section
13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of this
Prospectus and prior to the termination of the offering being made hereby shall
be deemed to be incorporated in this Prospectus by reference and to be a part
hereof from the respective dates of the filing of such documents.
 
     Any statement contained herein or in a document incorporated or deemed to
be incorporated by reference in this Prospectus will be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement
contained in this Prospectus, or in any other subsequently filed document which
is also incorporated or deemed to be incorporated by reference in this
Prospectus, modifies or supersedes such statement. Any statement so modified or
superseded will not be deemed, except as modified or superseded, to constitute a
part of this Prospectus.
 
     SPCC will provide, without charge, to each person, including a beneficial
owner, to whom a Prospectus is delivered, upon written or oral request of such
person, a copy of any and all of the information that has been incorporated by
reference in the Prospectus, excluding exhibits to such documents, unless such
exhibits are specifically incorporated by reference into the documents so
incorporated. Requests for copies of such documents should be addressed to the
Company at its principal executive offices as follows: Southern Peru Copper
Corporation, 180 Maiden Lane, New York, New York 10038, Attention: Secretary,
telephone number (212) 510-2000.
 
     THIS PROSPECTUS INCORPORATES DOCUMENTS BY REFERENCE WHICH ARE NOT PRESENTED
HEREIN OR DELIVERED HEREWITH. THESE DOCUMENTS ARE AVAILABLE WITHOUT CHARGE UPON
WRITTEN OR ORAL REQUEST FROM THE SECRETARY OF THE COMPANY AT THE COMPANY'S
PRINCIPAL EXECUTIVE OFFICES LOCATED AT 180 MAIDEN LANE, NEW YORK, NEW YORK
10038, TELEPHONE NUMBER (212) 510-2000. IN ORDER TO ENSURE TIMELY DELIVERY OF
SUCH DOCUMENTS, ANY REQUEST SHOULD BE MADE BY           , 1997.
 
                                        2
<PAGE>   5
 
                           FORWARD LOOKING STATEMENTS
 
     FORWARD LOOKING STATEMENTS IN THIS PROSPECTUS IN DOCUMENTS INCORPORATED BY
REFERENCE HEREIN AND IN OTHER COMPANY STATEMENTS, INCLUDING STATEMENTS REGARDING
EXPECTED COMMENCEMENT DATES OF MINING OR METAL PRODUCTION OPERATIONS, PROJECTED
QUANTITIES OF FUTURE METAL PRODUCTION, ANTICIPATED PRODUCTION RATES, OPERATING
EFFICIENCIES, COSTS AND EXPENDITURES AS WELL AS PROJECTED DEMAND OR SUPPLY FOR
THE COMPANY'S PRODUCTS ARE FORWARD LOOKING STATEMENTS WITHIN THE MEANING OF
SECTION 27A OF THE SECURITIES ACT AND SECTION 21E OF THE SECURITIES EXCHANGE ACT
OF 1934, AS AMENDED (THE "EXCHANGE ACT"). ACTUAL RESULTS COULD DIFFER MATERIALLY
DEPENDING ON FACTORS INCLUDING THE AVAILABILITY OF MATERIALS, EQUIPMENT,
REQUIRED PERMITS OR APPROVALS AND FINANCING, THE OCCURRENCE OF UNUSUAL WEATHER
OR OPERATING CONDITIONS, LOWER THAN EXPECTED ORE GRADES, THE FAILURE OF
EQUIPMENT OR PROCESSES TO OPERATE IN ACCORDANCE WITH SPECIFICATIONS, LABOR
RELATIONS, ENVIRONMENTAL RISKS AS WELL AS POLITICAL AND ECONOMIC RISK ASSOCIATED
WITH FOREIGN OPERATIONS. RESULTS OF OPERATIONS ARE DIRECTLY AFFECTED BY METALS
PRICES ON COMMODITY EXCHANGES WHICH CAN BE VOLATILE. THE ACCOMPANYING
INFORMATION CONTAINED IN THIS PROSPECTUS, INCLUDING WITHOUT LIMITATION THE
INFORMATION SET FORTH UNDER THE HEADING "RISK FACTORS", IDENTIFIES IMPORTANT
FACTORS THAT COULD CAUSE SUCH DIFFERENCES.
 
                                        3
<PAGE>   6
 
                     PRESENTATION OF FINANCIAL INFORMATION
 
     All references in this Prospectus to "U.S. dollars", "Dollars", "$", "US$",
"cents", or "c" are to United States currency and all references to "Sol",
"Soles" or "S/." are to Peruvian Soles after the establishment of the new
currency unit, the Nuevo Sol, in September 1991, unless the context indicates
otherwise.
 
     The consolidated financial statements of SPCC included herein are prepared
in U.S. dollars and in accordance with generally accepted accounting principles
in the United States ("U.S. GAAP"). SP Limited conducts its operations in Peru
through the Branch, which holds substantially all of the assets and liabilities
of SP Limited. As part of such registration, the Branch is deemed to have an
equity capital, of which SP Limited currently owns 97.5% and the holders of the
labor shares of the Branch, own the remainder. SPCC consolidates the financial
results of the Branch, and the labor shares are reflected in SPCC's financial
statements as a minority interest.
 
     The Branch maintains its financial records in Soles, prepares financial
information in accordance with generally accepted accounting principles in Peru
("Peruvian GAAP") and reports such information to the Peruvian government on
this basis for purposes of calculating its Peruvian tax liability as well as
amounts payable in respect of the workers' participations and the equity
interest of the Labor Shares and the Company in the Branch. These amounts are
calculated on the basis of Peruvian GAAP and cannot therefore be directly
derived from the consolidated financial statements appearing in this Prospectus,
which are prepared in accordance with U.S. GAAP. Peruvian GAAP requires the
inclusion in the financial statements of the Branch of the Resultado de la
Exposicion a la Inflacion ("Result of Exposure to Inflation") which seeks to
account for the effects of inflation by adjusting the value of non-monetary
assets and liabilities and equity by a factor corresponding to wholesale price
inflation rates during the period covered by the financial statements. Monetary
assets and liabilities are not so adjusted.
 
   
     Financial statements for SP Limited other than summary financial statements
are not presented because the results of SP Limited are included in (and such
results are substantially identical to) the consolidated financial statements of
SPCC, which has fully and unconditionally guaranteed payments on the Notes.
    
 
                                        4
<PAGE>   7
 
                                    SUMMARY
 
     The following summary is qualified in its entirety by, and should be read
in conjunction with, the more detailed information and the Consolidated
Financial Statements and the notes thereto included elsewhere or incorporated by
reference in this Prospectus.
 
     Throughout this Prospectus, unless the context otherwise requires, the
terms "Southern Peru", "SPCC" and "Company" refer to the parent corporation and
its consolidated subsidiaries, including Southern Peru Limited, a wholly-owned
subsidiary of the Company and the Issuer of the Notes.
 
     The Notes will be direct obligations of SP Limited and its Branch. Payments
of interest and principal and Additional Amounts, if any, will be made by SP
Limited or its Branch.
 
     All tonnage information in this Prospectus is expressed in short tons and
all references to ounces are to troy ounces, in each case, unless otherwise
specified. Certain terms relating to the transaction are defined in "Description
of Notes -- Certain Definitions" and certain terms relating to the copper mining
business are defined in "Glossary of Certain Mining Terms".
 
                                  THE COMPANY
 
GENERAL
 
     SPCC is an integrated producer of copper, which operates mining, smelting
and refining facilities in the southern part of Peru. ASARCO Incorporated
("Asarco") holds 54.1% of the outstanding capital stock of SPCC and consolidates
SPCC's results. In 1996, Asarco had sales of $2.7 billion (of which SPCC sales
represented approximately 28%). At June 30, 1997, Asarco had total assets of
$4.4 billion and, based on 1996 copper production, was among the largest private
sector copper mining companies in the world. Several members of Asarco's
management hold management positions in SPCC, and Asarco holds eight seats on
SPCC's Board of Directors. SPCC, incorporated in Delaware in 1995, is a holding
company which conducts its operations through its wholly-owned subsidiary, SP
Limited. SP Limited was incorporated in Delaware in 1952 and has conducted
copper mining operations in Peru since 1960.
 
     SPCC is among the world's ten largest private sector producers of copper,
producing 339,055 tons of copper from its mines in 1996. SPCC's average cash
cost of production was $0.539 per pound for copper sold in 1996. In 1996, the
Company had net sales of $753 million, of which $737 million were export sales.
At June 30, 1997, SPCC had total assets of $1.6 billion. The Company recently
approved an expansion of its Cuajone mine, which is expected to require a
capital investment of $245 million and to be completed in early 1999. The
Company also plans to modernize and expand its smelter in Ilo, Peru, which is
expected to require a capital investment of $787 million and to be completed in
2003. SPCC completed a five-year $445 million capital investment program in
1996, which included $120 million for new equipment and technology, $135 million
for environmental projects and $105 million for construction of a
solvent-extraction/electrowinning ("SX/EW") facility. As part of its $445
million investment program, the Company acquired the Ilo refinery in May 1994
from a Peruvian government-owned entity for $65 million and a commitment to make
an additional $20 million of improvements to the refinery over three years. The
Company's strategy is to continue to reduce costs and to increase production
through the expansion and modernization of its operations.
 
OPERATIONS
 
     The Company currently operates two open pit mines, Toquepala and Cuajone,
pursuant to concessions from the Peruvian government. The concessions each have
an indefinite term, subject to payment of concession fees of up to $2 per
hectare annually for the mining concessions and a fee based on nominal capacity
for the processing concessions. See "Regulatory Framework -- Mining and
Processing Concessions". At December 31, 1996, the Company's proven and probable
sulfide ore reserves were approximately 332 million tons with an average copper
grade of 0.82% at Toquepala and 1,400 million tons with an average copper grade
of 0.65% at Cuajone. At current design operating rates of copper production, the
Toquepala and Cuajone mine ore reserves have lives of 20 years and 55 years,
respectively. Additionally, at December 31, 1996, the Company had proven and
probable
 
                                        5
<PAGE>   8
 
leachable ore reserves of 650 million tons with an average copper grade of 0.20%
at Toquepala and 15 million tons with an average copper grade of 0.98% at
Cuajone. Copper concentrates produced at these two mines are processed at the
Company's smelter at Ilo, which also processes copper concentrates purchased
from external sources. In 1996, the smelter produced 316,804 tons of blister
copper, of which approximately 93% was from copper concentrates produced at the
Company's two mines. The Company also refines blister copper at its Ilo
refinery, which was acquired in May 1994. Acquisition of the refinery allowed
the Company to integrate its operations from mining of copper ore to the
production of refined copper and to reduce its cash costs of production. The
refinery currently has the capacity to refine approximately 247,000 tons
annually, representing approximately 78% of the Company's smelter production of
copper. The remaining unrefined blister copper is sold directly to various
customers under annual contracts.
 
     In addition to copper cathode produced from its refinery, the Company
produces copper cathode from its SX/EW facility, which commenced operations in
November 1995. The SX/EW facility produced 46,585 tons of cathode copper in 1996
at a cash operating cost of less than $0.35 per pound. The SX/EW process
involves leaching of low grade ore dumps and production of refined copper
through electrowinning.
 
     In 1996, the Company sold 347,145 tons of copper contained in blister or
copper cathodes. The Company also sold 8.7 million pounds of molybdenum and 3.1
million ounces of silver, produced as copper by-products.
 
     To support its operations, the Company owns and operates port facilities,
rail equipment, a 134-mile rail network, a water system and warehousing
facilities, as well as housing, schools and hospitals for approximately 4,000
employees and their families.
 
EXPANSION AND MODERNIZATION PROGRAM
 
     In September 1996, the Company announced its multi-year plan for the
expansion of the Cuajone copper mine and the modernization and expansion of its
copper smelter at Ilo.
 
     Stage I, the expansion of the Cuajone mine, is expected to require a
capital investment of approximately $245 million (including cost escalation and
contingencies) and is expected to be completed in early 1999. The expansion is
designed to increase ore production at Cuajone by 50% to 96,000 tons per day
from the current 64,000 tons per day and to increase copper production by the
Company by 130 million pounds annually or 19%. The project will include
upgrading Cuajone's ore conveying system and installing an additional secondary
and tertiary crushing line, two ball mills, additional flotation capacity and an
additional tailings thickener. The Company also expects to purchase one new
56-cubic yard shovel and 11 new 240-ton haul trucks.
 
     Stage II, the modernization of the Ilo smelter, is expected to be completed
in 2003 and to cost approximately $787 million (including cost escalation and
contingencies) based on the Company's engineering studies. The Company is
undertaking the smelter project in order to increase smelter production capacity
and to modernize the smelter in accordance with its recently approved agreement
with the government of Peru relating to environmental matters (the "Programa de
Adecuacion y Manejo Ambiental" or "PAMA"). See "Regulatory Framework --
Regulations, Permitting and Environmental Matters". The modernization of the Ilo
smelter will be completed in two phases. A new smelting furnace utilizing flash
furnace technology and associated support and environmental control facilities
will be installed by 2001. The converter operations will be modernized by
installing either flash technology or conventional Peirce-Smith converter
technology. This choice of converter technology is expected to be made before
2000 and new converter operations are planned to be in service by 2003. The time
frame allowed to select the converter technology will allow the Company to
evaluate the operation by others of the new flash converting technology. The
Company's modernization plan for the Ilo smelter is designed to avoid
significant disruptions in smelter production of blister copper during
construction and startup. Plans call for the smelter to continue to operate its
existing furnaces and converters until the new installations prove capable of
operating reliably at designed rates.
 
BRANCH AND LABOR SHARES
 
     SP Limited conducts its operations in Peru through the Branch. The Branch
is not a corporation separate from SP Limited. It is, however, an establishment,
registered pursuant to Peruvian law, through which SP Limited
 
                                        6
<PAGE>   9
 
holds assets, incurs liabilities and conducts operations in Peru. The Branch is
subject to Peruvian laws and jurisdiction and is considered to have a separate
legal identity for purposes of determining Peruvian income taxes. Although it
has neither its own capital nor liability separate from that of SP Limited, it
is deemed to have an equity capital for purposes of determining the economic
interests of holders of labor shares. Labor shares are non-voting ownership
interests distributed to workers in accordance with former Peruvian laws. As of
June 30, 1997 the labor shares represented a 2.5% interest in the equity of the
Branch. The Branch consists of substantially all the assets and liabilities of
SP Limited associated with its copper operations in Peru.
 
PRINCIPAL STOCKHOLDERS
 
     As of June 30, 1997 the percentage of outstanding common shares held by
Asarco, Cerro Trading Company, Inc. ("Cerro"), Phelps Dodge Overseas Capital
Corporation ("Phelps Dodge"), and the other common stockholders in the Company
were Asarco (54.1%), Cerro (14.2%), Phelps Dodge (13.9%) and other common
stockholders (17.8%), respectively. SPCC's Common Stock is traded on the New
York Stock Exchange, Inc. (the "NYSE") and the Lima Stock Exchange. SPCC's
ownership structure is shown below.
 
                            SPCC OWNERSHIP STRUCTURE
 
                                   FLOW CHART
 
     SPCC's and SP Limited's principal office in the United States is located at
180 Maiden Lane, New York, NY 10038, tel. (212) 510-2000. Their principal office
in Peru is located at Avenida Caminos del Inca No. 171, Chacarilla del Estanque,
Santiago de Surco, Lima 33, Peru, tel. (511) 438-6565.
 
                                        7
<PAGE>   10
 
                              TRANSACTION OVERVIEW
 
                                   FLOW CHART
 
    1. SP Limited issues US$150 million of Notes, secured by an interest in
       Export Contracts, Export Receivables and the proceeds thereof equal to
       the Total Collateral Percentage applicable to the Notes.
 
    2. SPCC fully and unconditionally guarantees payment of principal and
       interest on the Notes.
 
    3. SP Limited's Export Customers make payment in U.S. dollars in respect of
       Export Contracts directly into the offshore Collection Account held by
       the Collateral Trustee for the benefit of the holders of the Notes and
       certain other secured debt of SP Limited.
 
    4. A percentage of the Collections deposited in the Collection Account equal
       to the Total Collateral Percentage applicable to the Notes is transferred
       on a daily basis to the Note Collateral Account and a percentage of
       Collections equal to the Total Collateral Percentage for the other
       secured debt is transferred to one or more accounts for the benefit of
       the holders of other secured debt. The balance of the Collection Account
       is distributed daily to SP Limited. Amounts deposited to the Note
       Collateral Account are also distributed to SP Limited on a daily basis,
       except as set forth in note 6 below. Each series of SENs will have a
       separate Collateral Account and Reserve Account.
 
    5. Unless a Retention Trigger Event or a Debt Service Retention Event has
       occurred and is continuing (in which case the provisions of Note 6 will
       be applicable), SP Limited will make payments of principal and interest
       on the Notes directly from its own funds.
 
    6. During the continuance of a Retention Trigger Event or Debt Service
       Retention Event, prior to the release of any funds from the Note
       Collateral Account to SP Limited, the Trustee shall have retained from
       Collections deposited to the Note Collateral Account funds sufficient to
       pay the debt service due on the Notes on the next Payment Date. During
       the continuance of a Retention Trigger Event, a percentage of the
       remaining Collections in the Note Collateral Account equal to the Blocked
       Percentage will be retained in the Note Collateral Account and, in
       certain circumstances, will be used to redeem a portion of the Notes.
       Upon acceleration of the Notes following the occurrence of an Event of
       Default, all Collections in the Note Collateral Account will be retained
       and used to make payments on the Notes.
 
    7. SP Limited will initially fund the Note Reserve Account from the proceeds
       of the Notes in an amount equal to the Required Balance. The Note Reserve
       Account will be used to make payments on the Notes in the event that SP
       Limited fails to make payments of debt service as described above. The
       Note Reserve Account will be replenished from the Note Collateral Account
       if it is not replenished by SP Limited.
 
                                        8
<PAGE>   11
 
                                THE TRANSACTION
 
     The following summary does not purport to be complete and is qualified in
its entirety by reference to the provisions of the New Notes, the Guarantee, the
Indenture, the Supplemental Indenture and the Amended and Restated Collateral
Trust Agreement.
 
     Introduction.  The New Notes offered hereby are part of a program (the
"SENs Program") established by SP Limited providing for the issuance of up to
$750 million of Secured Export Notes (the "SENs") in series from time to time.
Payment of principal and interest on the SENs will be fully and unconditionally
guaranteed by SPCC as described herein (the "Guarantee"). The SENs will be
issued pursuant to an Indenture among SP Limited, SPCC, and Citibank, N.A., as
Trustee (the "Trustee"), as supplemented by a supplemental indenture (the
"Supplemental Indenture") for each series of SENs (collectively, the
"Indenture"). SP Limited has also entered into a $600 million secured term loan
and revolving credit facility (the "Credit Facility") with a group of lenders
(the "Lenders"). The Credit Facility will rank pari passu with the SENs and will
also be guaranteed, on a pari passu basis with the SENs, by SPCC. The SENs
Program and the Credit Facility are referred to herein as the "Program". The
maximum amount of principal which may be outstanding under the Program is $750
million (the "Program Amount"). In connection with the Program, SP Limited has
granted a security interest in favor of the Collateral Trustee pursuant to an
Amended and Restated Collateral Trust and Security Agreement between SP Limited
and Deutsche Bank AG, New York Branch (the "Collateral Trustee"), dated as of
May 30, 1997 (the "Amended and Restated Collateral Trust Agreement") for the
benefit of the holders of the SENs, the Lenders and holders of certain other
secured debt of SP Limited (collectively, the "Secured Parties") in the Export
Contracts (as defined herein) and Export Receivables arising from future copper
sales by SP Limited to customers located outside of Peru, covering up to a
maximum aggregate amount of 320,000 short tons annually. Collections (the
"Collections") in respect of Export Receivables will be deposited to a New York
segregated trust bank account (the "Collection Account") held by the Collateral
Trustee for the benefit of the Secured Parties. While the Collateral Trustee
will hold its interest in the Export Receivables for the benefit of all the
Secured Parties, each of the Notes, the other series of SENs, the Credit
Facility and the other secured debt will benefit only from a percentage interest
in the Export Receivables and the Collections as more fully described below. To
the extent that the aggregate percentage interest of all Secured Parties is less
than 100%, the Company will be entitled to receive the remaining percentage of
Collections on a daily basis in all circumstances, whether or not a default or
any other event has occurred. Except under certain circumstances, the Company
will also be entitled to receive on a daily basis the percentage of Collections
deposited to the sub-accounts described below. In addition to the security
interest described above, there has been established pursuant to the Indenture
for the benefit of the holders of the Notes, a collateral account (the "Note
Collateral Account") and a reserve account (the "Note Reserve Account"), which
are segregated trust accounts held by the Trustee in New York. Each series of
SENs will have a separate collateral account and reserve account established
pursuant to the related Supplemental Indenture.
 
     The Notes are initially entitled to a percentage security interest in the
Export Receivables and the Collections equal to the percentage of the Program
Amount represented by the original principal amount of the Notes (the "Note
Basic Collateral Percentage"). Subject to certain conditions, the Company will
have the option of designating an additional percentage security interest in the
Export Receivables and the Collections for the benefit of the Notes (the "Note
Additional Collateral Percentage") (together with the "Note Basic Collateral
Percentage", the "Note Total Collateral Percentage").
 
     Structure.  In connection with the granting of a security interest in the
Export Contracts and the Export Receivables to the Collateral Trustee, SP
Limited will (i) notify in writing each of its customers that is a party to an
Export Contract in respect of Export Receivables (the "Export Customers") of
such security interest and (ii) authorize and direct in writing each such
customer to pay all amounts owed by it under such Export Contracts directly into
the Collection Account. SP Limited will request each customer party to an Export
Contract to execute a consent and acknowledgment to pay in accordance with such
notice. SP Limited has filed UCC-1 financing statements with respect to the
security interest of the Secured Parties in the Export Contracts and the Export
Receivables. The Trustee will have a security interest in the Note Collateral
Account and Note Reserve Account (the "Note Collateral").
 
                                        9
<PAGE>   12
 
     As described above, all Collections will be deposited on a daily basis in
the Collection Account. On a daily basis, the Collateral Trustee will allocate
the Collections to the Secured Parties and the Company in accordance with their
respective percentage interests in the Collections on that day. Each day, the
percentage of Collections equal to the Note Total Collateral Percentage will be
deposited in the Note Collateral Account. Unless certain events (as more fully
described below) have occurred and are continuing, Collections deposited in the
Note Collateral Account will be paid on a daily basis to the Company. If, as of
the last day of the most recent month, the ratio of aggregate Collections
transferred to the Note Collateral Account during the preceding six-month period
to the sum of all scheduled payments of principal of, and interest (including
Additional Amounts) on the Notes for such six-month period is less than three to
one (a "Debt Service Retention Event"), then the Trustee will retain on deposit
in the Note Collateral Account an amount equal to the scheduled principal of,
and interest on, the Notes due on the next monthly Payment Date before remitting
the balance to SP Limited. Pursuant to the Indenture, if (i) the ratio of
Collections in the Note Collateral Account to the sum of scheduled debt service
on the Notes, each for the preceding three months, is less than 1.50, 1.75 or
2.00 (if the principal amount outstanding under the Program for such period is
less than $300 million, $300 to $500 million or greater than $500 million,
respectively), or (ii) the ratio of the Collections in the Note Collateral
Account to the sum of scheduled debt service on the Notes, each for the
preceding six months, is less than 1.75, 2.00 and 2.25 (if the principal amount
outstanding under the Program for such period is less than $300 million, $300 to
$500 million or greater than $500 million, respectively) (the "Debt Service
Coverage Ratios"), or (iii) default by the Company in the payment of any
principal or premium, if any, due on the SENs of such series, whether at
maturity, redemption or otherwise, or default by the Company in the payment of
any interest or Additional Amounts due on any SEN of such series within five
Business Days (as defined herein) of its scheduled payment date and (iv) any
governmental authority of the Republic of Peru shall have condemned,
nationalized, seized or otherwise expropriated (for a period greater than 60
days) all or substantially all of the property of SP Limited or SPCC, a Trigger
Event (as defined herein) will automatically occur (each, an "Automatic Trigger
Event").
 
     In addition, if, among other things, (i) the Company fails to meet its
financial covenants or violates other covenants which restrict the effecting of
certain mergers, consolidations or sales of assets, (ii) liens, other than
permitted liens, are incurred on the Export Receivables or the Company's copper
inventory or the Collateral Trustee or the Trustee ceases to have a perfected,
first priority security interest subject to certain permitted liens in the
Collateral or the Note Collateral, respectively, (iii) the Company defaults on
the payment of indebtedness greater than $30 million other than a Mandatory
Prepayment Event or otherwise defaults, which default results in the
acceleration of the repayment of such indebtedness, (iv) any Governmental
Authority of the Republic of Peru shall have enacted any rule, regulation or law
or have taken any other action which imposes restrictions on the free access to
foreign exchange affecting SPCC, SP Limited or the Branch or which prohibits the
payment of Export Receivables into the Collection Account and such rule,
regulation, law or action shall result in a Material Adverse Effect (as defined
herein) or (v) certain other events of default under the Indenture ("Events of
Default") occur, then the holders of 51% or more in principal outstanding amount
of the Notes may vote to declare that a Trigger Event has occurred (each, a
"Declared Trigger Event"). The Indenture provides that, upon the occurrence of
and during the continuance of an Automatic Trigger Event, any other event
described in clause (i), (ii), (iii) or (iv) of the immediately preceding
sentence, after applicable notice and cure periods, or any other Declared
Trigger Event (collectively, a "Retention Trigger Event"), the Trustee will
retain on deposit an amount equal to the scheduled principal of, and interest
on, the Notes due on the next monthly Payment Date. In addition, upon the
occurrence and during the continuance of an Automatic Trigger Event or a
Declared Trigger Event (a "Blocking Event"), the Trustee also will retain on
deposit a percentage of the remaining Collections equal to the applicable
blocked percentage (the "Blocked Percentage") and the remaining Collections will
be remitted to the Company. The Blocked Percentage will vary from 100% to 50%
depending on the amount of the Program which has been utilized at such time.
Amounts retained in the Note Collateral Account will be invested in Eligible
Investments. In the event that a Trigger Event based on the Debt Service
Coverage Ratios continues for a period in excess of twelve months and in certain
other cases, the Blocked Collections will be used to partially redeem the Notes
on each monthly Payment Date at a price equal to the principal amount of the
Notes being redeemed, plus a Make-Whole Premium, if any.
 
     Unless a Retention Trigger Event or Debt Service Retention Event has
occurred, the Company will make direct payments to the holders of scheduled
principal and interest on each monthly Payment Date. If a Retention
 
                                       10
<PAGE>   13
 
Trigger Event or a Debt Service Retention Event has occurred and is continuing,
payments of principal and interest on each monthly Payment Date will be made
from funds on deposit in the Note Collateral Account. In the event that the
Company fails to make the required payments or there are insufficient funds on
deposit in the Note Collateral Account to make the required payment, amounts on
deposit in the Note Reserve Account will be used to make the payments.
 
     The Note Reserve Account will be established and funded from the proceeds
of the issuance of the Old Notes. The required balance in the Note Reserve
Account (the "Required Balance") will be equal to the principal plus interest
due for the following three-month period under the Notes. Following any
withdrawal from the Note Reserve Account or any increase in the Required Balance
resulting from the commencement of the amortization of the Notes, Collections
deposited in the Note Collateral Account will be transferred to the Note Reserve
Account to bring the amounts on deposit in such account to the Required Balance.
The Company may, at its option, choose to substitute for any or all of the
Required Balance, one or more stand-by letters of credit issued by one or more
banks with a rating of A-1 and P-1, or better, by Moody's Investors Services,
Inc. ("Moody's") and Standard & Poor's Rating Services ("Standard & Poor's"),
respectively and D-1 by Duff & Phelps Credit Rating Co. ("Duff & Phelps"), if
rated by Duff & Phelps. Amounts on deposit in the Note Reserve Account will be
invested at the direction of the Company in short term, high grade investments.
 
     Events of Default include, among other things, (i) default in the payment
of principal, interest and Additional Amounts, (ii) the violation of covenants
restricting the effecting of certain mergers, consolidations or sales of assets,
(iii) the commencement of bankruptcy proceedings against the Guarantor, the
Issuer (or their respective Material Subsidiaries, as defined in the Indenture)
or the Branch, (iv) the Trustee ceasing to have a perfected, first priority
security interest in the Collateral, subject to certain permitted liens, and
additional collateral not being provided within 30 days, (v) the default in
payment of other indebtedness in excess of $30 million or (vi) the violation of
certain other covenants that are not cured within applicable grace periods. Upon
the occurrence of an Event of Default, the holders of a majority in principal
amount of the Notes may declare the principal amount of the Notes to be
immediately due and payable and thereafter 100% of the Collections in the Note
Collateral Account will be retained and applied to amounts due to the holders of
the Notes.
 
   
     Certain export receivables and contracts, including contracts covering up
to 40,000 tons in the aggregate, which may secure other debt arrangements of the
Company, may be excluded each year from the pool of export receivables and
contracts securing the Notes (the "Excluded Receivables"). SP Limited may elect
to exclude up to an additional 10% of Net Certified Export Sales (as defined in
the Amended and Restated Collateral Trust Agreement) from the Program Amount so
long as the Debt Service Coverage Ratios are being met; provided, that the
Program Amount will be reduced by the same percentage of receivables that are so
excluded. In addition, in any year when SP Limited's anticipated export copper
sales are less than 320,000 tons, if SP Limited sells more than 20% of its
copper production domestically, the Program Amount will be reduced by a
percentage equal to the percentage of domestic sales in excess of 20%. In 1997,
SP Limited expects to sell approximately 6% of its copper production
domestically.
    
 
     Receivables.  SP Limited sells substantially all of its copper production
directly to customers pursuant to Dollar-denominated annual and long-term sales
contracts. The majority of its copper production is sold to customers in Europe,
Asia and the United States. In general, SP Limited seeks each year to sell 100%
of its forecast mine production pursuant to long-term or annual sales contracts.
Any excess is generally sold on a spot basis to entities with whom SP Limited
has commercial relationships.
 
     SP Limited's principal copper customers include Union Miniere, Mitsui &
Co., Ltd., Pechiney Group, BICC Group, Asarco, Cerro Sales Corporation, MG Metal
& Commodity Co. Ltd., Delta Enfield Metals, Ltd., AB Electrokoppar and Colata
Continua Italiana SpA. These customers are expected to account for approximately
60% of SP Limited's total sales in 1997. SP Limited has a long-term commitment
to sell 46,300 tons of copper annually to Union Miniere. This contract expires
in 2003. SP Limited also has a long-term commitment to sell 26,500 tons of
copper annually to Mitsui, which expires in 2000. The receivables under the
Mitsui copper sales contract are Excluded Receivables.
 
                                       11
<PAGE>   14
 
The remaining 40% of SP Limited's total sales that is not accounted for by the
customers described above is accounted for by other customers around the world.
SP Limited has long-standing relationships with the majority of its customers
and relatively stable sales volumes to its customers.
 
     The table below shows anticipated sales quotas for SP Limited's principal
export customers for 1997.
 
          1997 ANTICIPATED SALES QUOTAS TO PRINCIPAL EXPORT CUSTOMERS
                                  (SHORT TONS)
 
<TABLE>
<CAPTION>
                                                                               PRODUCTS
                                                                   ---------------------------------
                                                                                   SX/EW     BLISTER
                            CUSTOMER                               ILO CATHODES   CATHODES   COPPER
- -----------------------------------------------------------------  ------------   --------   -------
<S>                                                                <C>            <C>        <C>
Union Miniere (Belgium)..........................................       6,600         660     46,300
Mitsui (Japan)...................................................      16,100      20,400
Pechiney Group (France)..........................................      27,800         550
BICC (England)...................................................      18,500       1,300
Asarco (U.S.)....................................................      18,600
MG Metals (England)..............................................      12,600
Colata (Italy)...................................................       9,900
Enfield (England)................................................      10,400         220
Cerro Sales (U.S.)...............................................       7,550       2,800
Electrokoppar (Sweden)...........................................       9,900
                                                                   ------------   --------   -------
          Total..................................................     137,950      25,930     46,300
                                                                    =========     =======     ======
</TABLE>
 
     SP Limited anticipates that approximately 6% of its copper sales in 1997
will be to domestic purchasers. In 1996, approximately 2% of copper sales were
sold domestically.
 
     SP Limited's electrolytic copper cathodes are registered on the London
Metal Exchange (the "LME"). All of SP Limited's copper sales, including domestic
sales, are denominated in U.S. dollars, except in certain limited circumstances,
and use LME prices as a reference. Domestic sales are denominated in U.S.
dollars, but are payable in Soles at the prevailing exchange rate. Most
customers receive shipments on a monthly basis at a constant volume throughout
the year. As a result, there is little seasonality in SP Limited's sales
volumes.
 
     SP Limited generally invoices its customers for copper sales on the basis
of market prices for refined metals and the amounts of metal contained in
unrefined products. Provisional invoices are issued upon shipment to customers.
Adjusted final invoices are issued following determination of the average LME
price for the month of final pricing as established by the contract which is
generally the month following delivery of the copper. In the case of blister
copper sales, the invoice reflects a deduction for third party refining charges.
Copper is shipped from the port of Ilo and title and risk of loss of the
shipment pass to the customer upon the loading of copper onto the ship at Ilo.
 
     SP Limited's sales contracts provide for cash payment upon delivery of
documents, which entitle the customers to take possession of the copper at the
port of arrival. Blister copper contracts provide for payment of 90% of the
estimated amount due upon delivery of documents, with the remaining 10% due
following receipt of final assays to determine the actual amount of contained
copper and other metals. Contracts for sales to European customers call for cash
payment and delivery of documents upon delivery of copper to the port of
arrival. Contracts for sales to Asian customers call for cash payment and
delivery of documents twenty days after shipment, which is usually two or more
weeks before the copper's arrival at its Asian destination. As an accommodation
to certain long-standing customers, SP Limited provides documents prior to
payment in accordance with industry practices.
 
     SP Limited's internal credit group evaluates the creditworthiness of each
potential customer by reviewing financial records and external credit reports.
SP Limited monitors its outstanding receivables and takes appropriate actions to
collect full payment for all of its sales. SP Limited has experienced two
uncollected debts during the past fifteen years totaling US$410,000.
 
                                       12
<PAGE>   15
 
                               THE EXCHANGE OFFER
 
   
Notes Offered..................    Up to $150,000,000 principal amount of 7.90%
                                   Series A-1 Secured Export Notes due 2007. The
                                   terms of the New Notes and the Old Notes are
                                   identical in all material respects, except
                                   that the offer of the New Notes will have
                                   been registered under the Securities Act and
                                   therefore, the New Notes will not be subject
                                   to certain transfer restrictions,
                                   registration rights and related additional
                                   interest provisions applicable to the Old
                                   Notes.
    
 
The Exchange Offer.............    The Issuer is offering, upon the terms and
                                   subject to the conditions of the Exchange
                                   Offer, to exchange $1,000 principal amount of
                                   New Notes for each $1,000 principal amount of
                                   Old Notes. See "The Exchange Offer" for a
                                   description of the procedures for tendering
                                   Old Notes. The Exchange Offer is intended to
                                   satisfy obligations of the Issuer under the
                                   Registration Rights Agreement, dated May 30,
                                   1997, between the Issuer and Credit Suisse
                                   First Boston Corporation, Chase Securities
                                   Inc., Citicorp Securities, Inc., Deutsche
                                   Morgan Grenfell Inc., Goldman Sachs & Co. and
                                   J.P. Morgan Securities Inc.
 
Consent to Amendments in
Amended and Restated Collateral
  Trust Agreement..............    By tendering their Old Notes, each holder
                                   participating in the Exchange Offer will be
                                   deemed to have consented, under the
                                   Registration Rights Agreement and the Amended
                                   and Restated Collateral Trust Agreement, to
                                   the changes made in the Second Amended and
                                   Restated Collateral Trust Agreement. See
                                   "Description of Notes -- The Amended and
                                   Restated Collateral Trust and Security
                                   Agreement".
 
   
Tenders, Expiration Date;
  Withdrawal...................    The Exchange Offer will expire at 5:00 p.m.,
                                   New York City time, on           , 1997, or
                                   such later date and time to which it is
                                   extended. The tender of Old Notes pursuant to
                                   the Exchange Offer may be withdrawn at any
                                   time prior to the Expiration Date. Any Old
                                   Notes not accepted for exchange for any
                                   reasons will be returned without expense to
                                   the tendering holder thereof as promptly as
                                   practicable after the expiration or
                                   termination of the Exchange Offer.
    
 
Federal Income Tax
Consequences...................    The exchange pursuant to the Exchange Offer
                                   will not result in any income, gain or loss
                                   to the holders or the Issuer for federal
                                   income tax purposes. See "Taxation -- United
                                   States Taxation -- Tax Consequences of the
                                   Exchange Offer".
 
Use of Proceeds................    There will be no proceeds to the Issuer from
                                   the issuance of the New Notes pursuant to the
                                   Exchange Offer.
 
Exchange Agent.................    Citibank, N.A. is serving as Exchange Agent
                                   in connection with the Exchange Offer.
 
       CONSEQUENCE OF EXCHANGING OLD NOTES PURSUANT TO THE EXCHANGE OFFER
 
     Based upon interpretations contained in letters issued to third parties by
the staff of the Commission, the Issuer believes that, generally, any holder of
Old Notes (other than a broker-dealer, as set forth below, and any holder who is
an "affiliate" of the Issuer within the meaning of Rule 405 under the Securities
Act) who exchanges its Old Notes for New Notes pursuant to the Exchange Offer
may offer such New Notes for resale,
 
                                       13
<PAGE>   16
 
resell such New Notes, or otherwise transfer such New Notes without compliance
with the registration and prospectus delivery provisions of the Securities Act,
provided such New Notes are acquired in the ordinary course of the holder's
business and such holder has no arrangement or understanding with any person to
participate in a distribution of such New Notes. Eligible holders wishing to
accept the Exchange Offer must represent to the Issuer in the Letter of
Transmittal that such conditions have been met and must represent, if such
holder is not a broker-dealer, or is a broker-dealer but will not receive New
Notes for its own account in exchange for Old Notes, that neither such holder
nor the person receiving such New Notes, if other than the holder, is engaged in
or intends to participate in the distribution of such New Notes. Each
broker-dealer that receives New Notes for its own account in exchange for Old
Notes must represent that the Old Notes tendered in exchange therefor were
acquired as a result of market-making activities or other trading activities and
must acknowledge that it will deliver a prospectus in connection with any resale
of such New Notes. See "Plan of Distribution". To comply with the securities
laws of certain jurisdictions, it may be necessary to qualify for sale or
register the New Notes prior to offering or selling such New Notes. The Issuer
does not currently intend to take any action to register or qualify the New
Notes for resale in any such jurisdiction. If a holder of Old Notes does not
exchange such Old Notes for New Notes pursuant to the Exchange Offer, such Old
Notes will continue to be subject to the restrictions on transfer contained in
the legend thereon. In general, the Old Notes may not be offered or sold, unless
registered under the Securities Act, except pursuant to an exemption from, or in
a transaction not subject to, the Securities Act and applicable state securities
laws. Any holder who tenders in the Exchange Offer with the intention to
participate, or for the purpose or participating, in a distribution of New Notes
could not rely on the position of the staff of the Commission enunciated in
Exxon Capital Holdings Corporation (available May 13, 1988) or similar no-action
letters and, in the absence of an exemption therefrom, must comply with the
registration and prospectus delivery requirements of the Securities Act in
connection with a secondary resale transaction. Failure to comply with such
requirements in such instance may result in such holder incurring liability
under the Securities Act for which the holder is not indemnified by the Issuer.
See "The Exchange Offer -- Consequences of Failure to Exchange" and
"Registration Rights Agreement; Special Interest".
 
                                       14
<PAGE>   17
 
                        SUMMARY DESCRIPTION OF THE NOTES
 
     The terms of the New Notes and the Old Notes are identical in all material
respects, except that the offer of the New Notes will have been registered under
the Securities Act and, therefore, the New Notes will not be subject to certain
transfer restrictions, registration rights and related special interest
provisions applicable to the Old Notes.
 
Issuer.....................  Southern Peru Limited
 
Guarantor..................  Southern Peru Copper Corporation
 
Securities Offered.........  Up to $150 million principal amount of 7.90%
                             Secured Export Exchange Notes due 2007.
 
Program Amount.............  $750 million available in total for (i) issuance in
                             series of SENs and (ii) outstandings under the $600
                             million secured term loan and revolving credit
                             facility.
 
Maturity Date..............  May 30, 2007
 
   
Scheduled Interest Payment
  Dates....................  The 30th day of each month (or the 28th day of
                             February), accruing from                     , 1997
                             (each, a "Payment Date"). The New Notes will bear
                             interest from           , 1997. Interest on each
                             New Note will accrue from the latter of (i) the
                             last interest payment date on which interest was
                             paid on the Old Note surrendered in exchange
                             therefor, or (ii) if the Old Note is surrendered
                             for exchange to occur on a date after the record
                             date for the next succeeding interest payment date
                             and prior to such interest payment date, the date
                             of such interest payment date.
    
 
Scheduled Amortization.....  Principal on the Notes is payable on each monthly
                             Payment Date, commencing June 30, 2000, in an
                             amount such that there will be "level debt"
                             installment payments of principal and interest on
                             the Notes over a period of 7 years.
 
Optional Redemption........  The Notes are redeemable in whole or in part at the
                             option of the SP Limited at 100% of the principal
                             amount thereof then outstanding, plus accrued
                             interest and a Make-Whole Premium equal to the
                             excess, if any, of (i) the present value of the
                             future debt service on the Notes being redeemed
                             (discounted at 75 basis points above the then
                             current yield on U.S. Treasury securities of a
                             maturity comparable to the remaining average life
                             of the Notes) over (ii) the outstanding principal
                             amount of the Notes being redeemed.
 
Ratings....................  The Notes and the SENs Program have been rated Baa3
                             by Moody's, BBB- by Standard & Poor's and BBB- by
                             Duff & Phelps. See "Description of
                             Notes -- Ratings".
 
Ranking of the Notes.......  The Notes are direct, unconditional senior
                             obligations of SP Limited and its Branch and will
                             rank pari passu with the other outstanding series
                             of SENs and with borrowings under the Credit
                             Facility. The Notes are entitled to the benefits
                             and security of the Collateral described below.
 
Guarantee..................  The Guarantee is a direct, unconditional senior
                             obligation of SPCC which will rank pari passu with
                             the guarantee by SPCC of borrowings under the
                             Credit Facility.
 
Collateral.................  The Notes are secured by the following Collateral:
 
Export Receivables, Export
  Contracts............... SP Limited will grant a security interest in the
                           Export Contracts and the Export Receivables to the
                           Collateral Trustee for the benefit of the holders,
                           lenders under the Credit Facility and holders of
                           certain other
 
                                       15
<PAGE>   18
 
   
                           secured debt of SP Limited. Export receivables
                           subject to the security interest in favor of the
                           Collateral Trustee may exclude receivables from the
                           sale of copper products (i) pursuant to specified
                           contracts up to an amount of 40,000 tons annually and
                           (ii) at the option of SP Limited, up to 10% of Net
                           Certified Export Sales (as defined herein), provided
                           that if SP Limited elects to exclude such 10%, the
                           Program Amount will be reduced by a percentage equal
                           to the percentage of receivables so excluded. If the
                           Company has utilized the full Program Amount of $750
                           million, it may not exclude such 10%. SP Limited may
                           not elect to exclude such 10% if either the
                           Three-Month Debt Service Coverage Ratio or the
                           Six-Month Debt Service Coverage Ratio (each as
                           defined herein) is not satisfied with respect to the
                           preceding three or six months, respectively. In
                           addition, SP Limited may exclude receivables in
                           respect of Excess Certified Export Sales. See
                           "Description of Notes -- The Collateral" and
                           "-- Certain Definitions".
    
 
Collection Account........ Collections in respect of Export Receivables will be
                           deposited in a segregated trust account maintained by
                           the Collateral Trustee in New York for the benefit of
                           the Secured Parties (including the holders of the
                           Notes).
 
Note Collateral Account... The Collateral Trustee will transfer on a daily basis
                           from the Collection Account a portion of the
                           Collections equal to the Note Total Collateral
                           Percentage into the Note Collateral Account. The Note
                           Total Collateral Percentage is equal to the Note
                           Basic Collateral Percentage plus the Additional
                           Percentage (as defined herein), if any. The Note
                           Basic Collateral Percentage is proportionate to the
                           ratio of the original principal amount of outstanding
                           Notes to the Program Amount. Except as described
                           below, amounts in the Note Collateral Account will be
                           remitted daily to SP Limited. Amounts in the Note
                           Collateral Account will be retained by the Trustee up
                           to an amount equal to the scheduled debt service on
                           the Notes due on the next monthly Payment Date upon
                           the occurrence and continuance of a Retention Trigger
                           Event or a Debt Service Retention Event. In addition,
                           during the continuance of a Blocking Event, a portion
                           of the remaining Collections deposited in the Note
                           Collateral Account equal to the Blocked Percentage
                           will be retained in the Note Collateral Account. Upon
                           acceleration of the Notes following the occurrence of
                           an Event of Default, all Collections in the Note
                           Collateral Account will be retained and used to make
                           payments on the Notes.
 
Note Reserve Account...... SP Limited will be required to maintain the Required
                           Balance in the Note Reserve Account. The Required
                           Balance is equal to the debt service due on the Notes
                           for the next three monthly Payment Dates. The
                           Required Balance will be funded initially from the
                           proceeds of the Notes. Alternatively, letters of
                           credit issued for the benefit of the Trustee may be
                           substituted for all or part of the Required Balance.
                           On any monthly Payment Date that SP Limited fails to
                           pay the scheduled principal of, and interest on the
                           Notes due on such date, the Trustee will draw on the
                           Note Reserve Account (or the letters of credit) to
                           meet such scheduled debt service on the Notes. Any
                           deficiency in the Required Balance will be
                           replenished with funds deposited to the Note
                           Collateral Account. See "Description of Notes -- The
                           Collateral".
 
                                       16
<PAGE>   19
 
Taxes; Additional
Amounts....................  Payments on the Notes (including principal and
                             interest) will be made free and clear of any
                             withholding or deduction for or on account of any
                             Peruvian Tax, unless SP Limited is required by law
                             to pay such Peruvian Tax directly or by means of
                             withholding or deduction. In case of withholding or
                             deduction, additional amounts will, subject to
                             certain exceptions, be paid (the "Additional
                             Amounts") so that holders of the Notes will receive
                             the amounts that they would have received had no
                             such Peruvian Tax been withheld or deducted. See
                             "Description of Notes -- Payments of Additional
                             Amounts".
 
                             Payments of interest on the Notes to holders that
                             are not corporations, partnerships or trusts
                             organized under the laws of the United States or a
                             State thereof or a corporation or other entity
                             organized or established under the laws of any
                             jurisdiction outside Peru will be subject to income
                             tax withholding in Peru, currently at a rate of
                             30%, for which no Additional Amounts will be paid.
                             As a consequence, no Additional Amounts will be
                             payable to individuals or estates. Therefore, such
                             holders could face adverse tax consequences if they
                             purchase the Notes. See "Taxation -- Peruvian
                             Taxation".
 
Tax Redemption.............  The Notes are redeemable at the option of SP
                             Limited or SPCC as a whole (or in part if SP
                             Limited or its Branch or SPCC is or will become
                             obligated to pay Additional Amounts or excess
                             Interest Tax (as defined below) aggregating at
                             least $1,000,000 per annum) at their principal
                             amount together with accrued interest and any
                             Additional Amounts thereon to the date of
                             prepayment if at any time SP Limited or its Branch
                             or SPCC for any reason would be obligated,
                             notwithstanding efforts to avoid such obligation,
                             to pay Additional Amounts in excess of those
                             attributed to Peruvian Tax of 1% withheld from
                             interest payments to holders of Notes that are not
                             domiciled in Peru for Peruvian tax purposes or to
                             pay a tax in excess of 1% on payments of interest
                             to holders of Notes that are not domiciled in Peru
                             for Peruvian tax purposes directly to the
                             applicable Peruvian taxing authority (an "Interest
                             Tax"), provided that SP Limited delivers an opinion
                             of independent legal counsel confirming the tax
                             obligation. See "Description of Notes -- Optional
                             Redemptions for Tax Reasons". If the Issuer or
                             Guarantor is or will become obligated to pay excess
                             Additional Amounts or excess Interest Tax only with
                             respect to Notes held by a certain type (or types)
                             of holders, the Issuer or Guarantor may effect a
                             partial redemption for tax reasons of the Notes
                             held by such holders and may not redeem the Notes
                             of other holders. Any other partial redemption of
                             the Notes for tax reasons will be limited to the
                             aggregate amount of Notes required to be redeemed
                             such that the aggregate Additional Amounts and
                             Interest Tax on the outstanding Notes after such
                             redemption equals the amount of Additional Amounts
                             and Interest Tax which would have been payable at a
                             withholding or tax rate of 1% (without giving
                             effect to such partial redemption).
 
                             Holders of two-thirds or more of the aggregate
                             principal amount of the Notes may waive the right
                             to Additional Amounts in respect of withholding
                             taxes in excess of a rate of 1% or agree to receive
                             interest payments net of Interest Taxes in excess
                             of 1%, in which case SP Limited or SPCC will not be
                             entitled to redeem the Notes for tax reasons and
                             will not be obligated to pay any excess Additional
                             Amounts.
 
Certain Covenants..........  In the Indenture, the Company covenants to maintain
                             a Consolidated Tangible Net Worth at least equal to
                             $750 million and a Debt to Capitalization (each as
                             defined herein) ratio of no greater than 50%. The
                             Indenture
 
                                       17
<PAGE>   20
 
                             also contains covenants restricting, among other
                             things, the creation of liens on the Principal
                             Properties (as defined herein), and the effecting
                             of certain mergers, consolidations or sales of
                             assets. In addition, the Company will covenant that
                             it will not create liens with respect to Export
                             Contracts or Export Receivables other than those in
                             favor of the Collateral Trustee and certain
                             permitted liens. See "Description of
                             Notes -- Covenants" and "-- Trigger Events".
 
Trigger Events.............  Trigger Events in the Indenture, include, among
                             other things, (i) if the ratio of Collections in
                             the Note Collateral Account to the sum of scheduled
                             debt service on the Notes, each for the preceding
                             three months, is less than 1.50, 1.75 or 2.00 (if
                             the principal amount outstanding under the Program
                             for such period is less than $300 million, $300 to
                             $500 million or greater than $500 million,
                             respectively), (ii) if the ratio of the Collections
                             in the Note Collateral Account to the sum of
                             scheduled debt service on the Notes, each for the
                             preceding six months, is less than 1.75, 2.00 and
                             2.25 (if the principal amount outstanding under the
                             Program for such period is less than $300 million,
                             $300 to $500 million or greater than $500 million,
                             respectively), (iii) the Company failing to meet
                             its financial covenants or violating other
                             covenants which restrict the effecting of certain
                             mergers, consolidations or sales of assets, (iv)
                             the creation of liens, other than permitted liens,
                             on the Export Receivables or the Company's copper
                             inventory or the Collateral Trustee or Trustee
                             ceases to have a perfected, first priority security
                             interest in the Collateral subject to permitted
                             liens, (v) the Company defaulting on the payment of
                             indebtedness greater than $30 million or otherwise
                             defaulting if such default results in the
                             acceleration of the repayment of such indebtedness
                             other than as a result of a Mandatory Prepayment
                             Event (as defined herein), (vi) any Governmental
                             Authority of the Republic of Peru shall have
                             enacted any rule, regulation or law or have taken
                             any other action which imposes restrictions on the
                             free access to foreign exchange affecting SPCC, SP
                             Limited or the Branch or which prohibits the
                             payment of Export Receivables into the Collection
                             Account and such rule, regulation, law or action
                             shall result in a Material Adverse Effect (as
                             defined in the Indenture) and (vii) the occurrence
                             of other Events of Default. Generally, the events
                             described above (except for certain specified
                             events, including the events specified in clauses
                             (i) and (ii) above) will not become Trigger Events
                             until the Company has failed to remedy a default
                             after the applicable grace period set forth in the
                             Indenture which generally commences on the earlier
                             of knowledge of the default by a Responsible
                             Officer of the Company or receipt of notice by the
                             Company from the Trustee or Holders of 10% of the
                             aggregate principal amount of the Notes. Upon the
                             occurrence of a Trigger Event which becomes a
                             Retention Trigger Event and/or a Blocking Event
                             (which, in the case of certain Trigger Events
                             requires the vote of holders of 51% or more of the
                             outstanding principal amount of the Notes), the
                             Collateral Trustee will retain collections in the
                             Note Collateral Account as provided above under
                             "Note Collateral Account" until such Trigger Event
                             is cured or deemed to be cured as provided in the
                             Indenture. See "Description of Notes -- Trigger
                             Events".
 
Accelerated Amortization
Event......................  Certain Blocking Events, with the passage of time
                             or the vote of 51% or more of the outstanding
                             principal amount of the Notes, will become
                             Accelerated Amortization Events (as defined in the
                             Indenture). Blocked Collections will be applied to
                             redemption of the Notes at a price equal to
 
                                       18
<PAGE>   21
 
                             par plus a Make-Whole Premium. An Accelerated
                             Amortization Event may be rescinded or waived by
                             the affirmative vote of holders of 51% or more of
                             the outstanding principal amount of Notes.
                             Following cure of the underlying Trigger Event, the
                             resulting Accelerated Amortization Event shall be
                             deemed cured, and there will be no further
                             prepayment of Notes. Prepayments will be applied
                             pro rata to all remaining scheduled payments on the
                             Notes. Upon cure of the underlying Trigger Event,
                             the Company will again pay principal of, and
                             interest on, the Notes pursuant to the original
                             schedule of "level debt" installment payments of
                             principal and interest, with each such installment
                             amount reduced pro rata to reflect the pro rata
                             application of prepayments, during the pendency of
                             the Accelerated Amortization Event. See
                             "Description of Notes -- Accelerated Amortization
                             Event".
 
Events of Default..........  Events of Default in the Indenture include, among
                             others, the following: (i) failure to pay principal
                             when due or interest within five business days of
                             the date when due; (ii) failure to comply with
                             financial and certain other covenants; (iii)
                             bankruptcy events; (iv) failure to deliver notice
                             and form acknowledgment to customers with intent to
                             avoid the security arrangements for the Notes; (v)
                             the creation of liens, other than permitted liens,
                             on the Export Receivables or the Company's copper
                             inventory or the Trustee or the Collateral Trustee
                             ceasing to have a perfected first priority security
                             interest in the collateral, subject to permitted
                             liens, and (vi) the Company defaulting on the
                             payment of indebtedness greater than $30 million or
                             otherwise defaulting if such default results in the
                             acceleration of the repayment of such indebtedness
                             other than as a result of a Mandatory Prepayment
                             Event and expropriation of all or substantially all
                             of SP Limited's assets for a period in excess of 60
                             days. Generally, the events described above (except
                             for certain specified events) will not become
                             Events of Default until the Company has failed to
                             remedy a default after the applicable grace period
                             set forth in the Indenture, which grace period
                             generally commences upon the earlier of (i)
                             knowledge of the default by a responsible officer
                             of the Company or (ii) receipt of notice by the
                             Company from the Trustee or holders of 10% of the
                             aggregate principal amount of the Notes.
 
                             The Notes will become due and payable and 100% of
                             the Collections deposited in the Note Collateral
                             Account will be retained and used to repay the
                             Notes automatically upon the occurrence of a
                             bankruptcy-related Event of Default or in all other
                             cases upon the direction of holders having 51% of
                             the outstanding principal amount of the Notes;
                             provided, however, that if any Event of Default
                             constituted a Trigger Event, the holders of Notes
                             will conduct a vote (separate from any vote taken
                             to direct the Collateral Trustee to retain Blocked
                             Collections) to declare the Notes due and payable.
 
Indenture..................  The Notes are issued pursuant to an Indenture and a
                             Supplemental Indenture.
 
Governing Law..............  The Indenture, the Notes and the Amended and
                             Restated Collateral Trust Agreement are each
                             governed by the laws of the State of New York.
 
Risk Factors...............  For a discussion of certain material factors to be
                             considered by potential investors in connection
                             with an investment in the Notes, see "Risk
                             Factors".
 
Collateral Trustee.........  Deutsche Bank AG, New York Branch
 
Indenture Trustee..........  Citibank, N.A.
 
                                       19
<PAGE>   22
 
              SELECTED SUMMARY CONSOLIDATED FINANCIAL INFORMATION
 
     The following summary financial information of SPCC and its consolidated
subsidiaries, as of and for each year in the five years ended December 31, 1996
has been derived from the consolidated financial statements audited by Coopers &
Lybrand, L.L.P. independent accountants. The summary financial information as of
and for the six months ended June 30, 1997 and June 30, 1996 is unaudited. In
the opinion of management, all adjustments (consisting only of normal recurring
accruals) have been made to present fairly on a basis consistent with generally
accepted accounting principles the condensed consolidated balance sheet and
statements of earnings for such periods. The results of operations for the six
months ended June 30, 1997 are not necessarily indicative of results for the
year ending December 31, 1997. This information is qualified in its entirety by,
and should be read in conjunction with, the Consolidated Financial Statements
and the related notes thereto included elsewhere and incorporated herein by
reference in this Prospectus.
 
   
<TABLE>
<CAPTION>
                                   SIX MONTHS ENDED JUNE
                                            30,                               YEAR ENDED JUNE 30,
                                  -----------------------   --------------------------------------------------------
                                     1997         1996         1996         1995        1994       1993       1992
                                  ----------   ----------   ----------   ----------   --------   --------   --------
                                        (DOLLARS IN THOUSANDS, EXCEPT FOR PER SHARE AMOUNTS AND COPPER PRICE)
<S>                               <C>          <C>          <C>          <C>          <C>        <C>        <C>
CONSOLIDATED STATEMENTS OF
  EARNINGS:
  Net sales.....................  $  441,008   $  369,577   $  753,032   $  928,840   $701,678   $547,511   $622,033
  Operating costs and
    expenses(1).................     291,658      233,371      504,267      562,183    559,651    477,326    490,094
  Operating income..............     149,350      136,206      248,765      366,657    142,027     70,185    131,939
  Minority interest of labor
    shares in income of Peruvian
    Branch......................       3,418        3,364        5,208       43,558     18,610     11,218     20,510
  Earnings before cumulative
    effect of the change in
    accounting principle........     115,416       94,337      180,512      217,754     91,224     29,130     45,638
  Cumulative effect of the
    change in accounting
    principle...................          --           --           --           --         --    165,092(2)       --
                                    --------     --------   ----------   ----------   --------   --------   --------
  Net earnings..................  $  115,416   $   94,337   $  180,512   $  217,754   $ 91,224   $194,222   $ 45,638
                                    ========     ========   ==========   ==========   ========   ========   ========
PER SHARE AMOUNTS(3)
  Earning before cumulative
    effect of the change in
    accounting principle........  $     1.44   $     1.18   $     2.25   $     3.31   $   1.39   $   0.45   $   0.69
  Cumulative effect of the
    change in accounting
    principle...................          --           --           --           --         --       2.51         --
  Net earnings..................        1.44         1.18         2.25         3.31       1.39       2.96       0.69
  Dividends paid................        0.65         0.95         1.47         1.27       0.33       0.27       0.23
BALANCE SHEET INFORMATION (END
  OF PERIOD):
  Cash and marketable
    securities..................  $  419,115   $  237,737   $  174,205   $  262,099   $136,333   $ 67,548   $ 83,073
  Working capital...............     608,816      318,129      297,795      312,476    242,384    184,761    164,587
  Net property..................     854,632      811,345      855,808      779,368    522,850    390,719    390,187
  Total assets..................   1,612,814    1,255,757    1,279,849    1,271,701    968,506    727,951    723,253
  Long-term debt................     271,050      105,397       82,892       76,828    114,118     15,600         --
  Total liabilities and minority
    interest....................     534,497      285,279      264,822      318,214    333,657    162,911    334,435
  Stockholders' equity..........   1,078,317      970,478    1,015,027      953,487    634,849    565,040    388,818
</TABLE>
    
 
                                       20
<PAGE>   23
 
<TABLE>
<CAPTION>
                                   SIX MONTHS ENDED JUNE
                                            30,                             YEAR ENDED DECEMBER 31,
                                  -----------------------   --------------------------------------------------------
                                     1997         1996         1996         1995        1994       1993       1992
                                  ----------   ----------   ----------   ----------   --------   --------   --------
                                        (DOLLARS IN THOUSANDS, EXCEPT FOR PER SHARE AMOUNTS AND COPPER PRICE)
<S>                               <C>          <C>          <C>          <C>          <C>        <C>        <C>
OTHER ITEMS:
  Depreciation, amortization and
    depletion...................  $   23,107       20,670   $   41,623   $   35,952   $ 39,742   $ 34,601   $ 32,491
  Capital expenditures..........      61,354       51,931      120,803      183,041    181,912     31,859     23,063
  Cash dividends................      52,125       76,204      117,913       83,747     21,415     18,000     15,000
  Ratio of earnings to fixed
    charges(4)..................       20.26        21.49        19.95        23.35      15.14     123.57     294.51
  Average LME Copper Price
    (per pound).................  $     1.12   $     1.14   $     1.04   $     1.33   $   1.05   $   0.87   $   1.04
</TABLE>
 
- ---------------
(1) Includes provision for workers' participation of $10.9 million, $10.4
    million, $18.0 million, $32.2 million, $13.9 million, $8.8 million and $14.1
    million in the six months ended June 30, 1997 and 1996 and in years ended
    December 31, 1996, 1995, 1994, 1993 and 1992, respectively.
 
(2) Represents the cumulative effect, as of January 1, 1993, of adopting
    Statement of Financial Accounting Standards ("SFAS") No. 109 "Accounting for
    Income Taxes".
 
(3) Per share amounts are presented after giving retroactive effect to a 100 to
    1 stock split declared and made on November 4, 1994.
 
(4) The ratio of earnings to fixed charges has been computed by dividing
    operating income by interest expense.
 
                                       21
<PAGE>   24
 
                     SELECTED SUMMARY OPERATING INFORMATION
 
     The following table presents summary production and sales data for the
Company for the periods indicated. For more information regarding such data, see
"Business and Properties".
 
<TABLE>
<CAPTION>
                                  SIX MONTHS ENDED JUNE
                                           30,                                    YEAR ENDED DECEMBER 31,
                                 ------------------------    ------------------------------------------------------------------
                                    1997          1996          1996          1995          1994          1993          1992
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
<S>                              <C>           <C>           <C>           <C>           <C>           <C>           <C>
COPPER MINING
  Ore Mined (in tons):
    Toquepala mine..............  9,302,000     8,984,000    18,609,000    16,937,000    15,907,000    16,044,000    15,559,000
    Cuajone mine................ 10,499,000    10,321,000    21,249,000    21,378,000    21,785,000    21,409,000    21,471,000
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total................... 19,801,000    19,305,000    39,858,000    38,315,000    37,692,000    37,453,000    37,030,000
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
  Average Copper Ore Grade:
    Toquepala mine..............       0.74%         0.87%         0.81%         0.86%         0.80%         0.83%         0.85%
    Cuajone mine................       0.93%         0.95%         0.96%         0.79%         0.84%         0.83%         0.86%
        Weighted Average........       0.84%         0.91%         0.89%         0.82%         0.82%         0.83%         0.86%
COPPER PRODUCTION
  (contained copper in tons):
  Mines
    Toquepala mine..............     60,067        63,780       126,464       128,064       111,797       115,047       113,232
    Cuajone mine................     83,180        80,922       166,006       145,491       156,037       150,410       157,946
    SX/EW(1)....................     24,029        22,658        46,585         5,006            --            --            --
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................    167,276       167,360       339,055       278,561       267,834       265,457       271,178
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
ILO SMELTER
  (blister copper in tons):
  From SPCC concentrates........    124,984       137,643       294,997       268,761       268,432       265,046       268,407
  From purchased concentrates...     13,700         8,255        21,807        48,467        53,671        47,749        35,482
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................    138,684       145,898       316,804       317,228       322,103       312,795       303,889
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
REFINED COPPER (in tons) (2):
  Cathode production (for
    SPCC).......................    125,715       101,871       219,800       216,207       210,671       198,375       197,059
  SX/EW(1)......................     24,029        22,658        46,585         5,006            --            --            --
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................    149,744       124,529       266,385       221,213       210,671       198,375       197,059
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
SILVER PRODUCTION
  (troy ounces contained in
    blister):
  From SPCC concentrates........  1,369,147     1,434,195     3,096,506     2,957,670     2,979,199     2,813,242     2,675,094
  From purchased concentrates...    167,573        87,787       192,684       605,244       555,511       444,983       345,686
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................  1,536,720     1,521,982     3,289,190     3,562,914     3,534,710     3,258,225     3,020,780
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
MOLYBDENUM PRODUCTION
  (in tons contained in
    concentrates):..............      2,198         1,913         4,370         4,004         3,060         3,156         3,542
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
COPPER SALES (IN TONS):
  Refined.......................    150,539       124,849       265,936       223,006       212,388       200,447       191,977
  In blister....................     27,436(3)     40,574        81,209       100,296       114,173       106,223       102,555
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................    177,975       165,423       347,145       323,302       326,561       306,670       294,532
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
COPPER EXPORTS (IN TONS):
  Refined.......................    139,677       123,261       257,151       223,006       212,388       200,447       191,977
  In blister....................     27,436(3)     40,574        80,604       100,296       114,173       106,223       102,555
                                 ----------    ----------    ----------    ----------    ----------    ----------    ----------
        Total...................    167,113       163,835       337,755       323,302       326,561       306,670       294,532
                                 ==========    ==========    ==========    ==========    ==========    ==========    ==========
</TABLE>
 
- ---------------
(1) The SX/EW facility commenced production in November 1995.
 
(2) The Ilo refinery was purchased by the Company in May 1994. The data prior to
    the acquisition reflects cathode production for SPCC on a toll basis.
 
(3) In the six months ended June 30, 1997 copper sales and copper exports in
    blister included 9,977 tons of copper contained in concentrate.
 
                                       22
<PAGE>   25
 
                                  RISK FACTORS
 
     Holders of Old Notes should consider carefully all the information in this
Prospectus and, in particular, the following risk factors before accepting the
Exchange Offer. For additional information concerning Peru and certain matters
described below see "Annex A -- The Republic of Peru". As a general matter,
investing in the securities of an issuer, substantially all of whose operations
are in a developing country such as Peru, involves a higher degree of risk than
investing in securities of issuers with substantially all of their operations in
the United States and other jurisdictions.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
     Holders of Old Notes who do not exchange their Old Notes for New Notes
pursuant to the Exchange Offer will continue to be subject to the restrictions
on transfer of such Old Notes as set forth in the legend thereon, and, except in
certain limited circumstances, will no longer have any registration rights with
respect to the Old Notes. However, the Company will offer the holders who are
not permitted to participate in the Exchange Offer the right to exchange in a
private exchange offer the Old Notes for New Notes, which will be subject to
restrictions on transferability. In general, the Old Notes may not be offered or
sold, unless registered under the Securities Act, except pursuant to an
exemption from, or in a transaction not subject to, the Securities Act and
applicable state securities laws. The Issuer does not intend to register the Old
Notes under the Securities Act. The Issuer believes that, based upon
interpretations contained in letters issued to third parties by the staff of the
Commission, New Notes issued pursuant to the Exchange Offer in exchange for Old
Notes may be offered for resale, resold or otherwise transferred by each holder
thereof (other than a broker-dealer, as set forth below, and any such holder
which is an "affiliate" of the Issuer within the meaning of Rule 405 under the
Securities Act) without compliance with the registration and prospectus delivery
provisions of the Securities Act provided that such New Notes are acquired in
the ordinary course of such holder's business and such holder has no arrangement
or understanding with any person to participate in the distribution of such New
Notes. Eligible holders wishing to accept the Exchange Offer must represent to
the Issuer in the Letter of Transmittal that such conditions have been met and
must represent, if such holder is not a broker-dealer, or is a broker-dealer but
will not receive New Notes for its own account in exchange for Old Notes, that
neither such holder nor the person receiving such New Notes, if other than the
holder, is engaged in or intends to participate in the distribution of such New
Notes. Each broker-dealer that receives New Notes for its own account pursuant
to the Exchange Offer must represent that the Old Notes tendered in exchange
therefor were acquired as a result of market-making activities or other trading
activities and must acknowledge that it will deliver a prospectus in connection
with any resale of such New Notes. The Letter of Transmittal states that by so
acknowledging and by delivering a prospectus, a broker-dealer will not be deemed
to admit that it is an "underwriter" within the meaning of the Securities Act.
This Prospectus, as it may be amended or supplemented from time to time, may be
used by a broker-dealer in connection with the resales of New Notes received in
exchange for Old Notes where such Old Notes were acquired by such broker-dealer
as a result of market-making activities or other trading activities. The Issuer
has agreed that, for a period of 90 days after the consummation of the Exchange
Offer it will make this Prospectus available to any broker-dealer for use in
connection with any such resale. See "Plan of Distribution". However, to comply
with the securities laws of certain jurisdictions, if applicable, the New Notes
may not be offered or sold unless they have been registered or qualified for
sale in such jurisdiction or an exemption from registration or qualification is
available and is complied with. The Issuer does not currently intend to take any
action to register or qualify the New Notes for resale in any such
jurisdictions. In addition, the tender of Old Notes pursuant to the Exchange
Offer will reduce the principal amount of the Old Notes outstanding, which may
have an adverse effect upon, and increase the volatility of, the market price of
the Old Notes due to a reduction in liquidity.
 
FACTORS RELATING TO THE COPPER INDUSTRY, THE COMPANY AND THE SOURCE OF PAYMENT
FOR NOTES
 
  Production of Copper; Reserves
 
     Substantially all of the Company's revenues are derived from copper
produced by the Toquepala mine, the Cuajone mine and the smelter and refinery at
Ilo, all of which are located within a 30-mile radius in the southern part of
Peru. If operations at any of these locations were significantly reduced,
interrupted or curtailed, the
 
                                       23
<PAGE>   26
 
Company's ability to generate export receivables, revenues and profits and make
required payments on the Notes could be materially and adversely affected.
 
     As of December 31, 1996, SPCC had sulfide ore reserves at the Toquepala
mine of 332 million tons and at the Cuajone mine of 1,400 million tons. In
addition, SPCC had leachable reserves of 665 million tons and mineralized
material of 380 million tons at the two mines. The Company's reported ore
reserves are estimated quantities of proven and probable ore that under present
and anticipated conditions may be economically mined and processed by the
extraction of their mineral content. The Company determines the amount of its
ore reserves in accordance with the regulations of the Commission. The volume
and grade of reserves actually recovered and rates of production from the
Company's present ore reserves may not conform exactly to geological
measurements of the reserves. Further, market price fluctuations in copper and
changes in operating and capital costs may render certain ore reserves
uneconomic to mine. See "Business and Properties -- Reserves".
 
     The business of mining, smelting and refining copper is generally subject
to a number of risks and hazards, including industrial accidents, labor
disputes, unexpected geological conditions, slope failures, changes in the
regulatory environment, environmental hazards and weather and other natural
phenomena such as earthquakes and floods. Such occurrences could result in
damage to, or destruction of, mineral properties or production facilities,
personal injury or death, environmental damage, delays in mining, monetary
losses and possible legal liability. The Company maintains insurance typical in
the copper mining industry and in amounts that the Company believes to be
adequate, but which may not provide complete coverage in certain circumstances.
However, insurance against certain risks (including certain liabilities for
environmental pollution or other hazards as a result of exploration and
production) is not generally available to the Company or to other companies
within its industry.
 
     Under each of the Company's copper sales agreements, the Company or its
customer may suspend or cancel delivery of copper during a period of force
majeure. Events of force majeure under the agreements include acts of nature,
strikes, fires, floods, wars, transportation delays, government actions or other
events that are beyond the control of the parties. Any suspension or
cancellation of deliveries under copper sales contracts that are not replaced by
delivery under new contracts or sales on the spot market would reduce the amount
of Export Receivables available to secure the Notes and could have a material
adverse effect on the business, financial condition, results of operations or
prospects of the Company.
 
  Prices of Copper/Cyclicality of Industry
 
     The copper market is highly cyclical and the Company's business, financial
condition, results of operations and prospects depend to a large degree on the
international prices for copper established by the LME. Such prices have
historically fluctuated widely and are affected by numerous factors beyond the
Company's control, including the overall demand for and worldwide supply of
copper, the availability and price of competing commodities, international
economic trends, currency exchange fluctuations, expectations of inflation,
actions of commodity markets participants, consumption and demand patterns and
political events in major producing countries. See "Overview of Copper Market".
The Company believes that it is currently ranked among the lowest cost, private
sector copper producers. There can be no assurance, however, that the Company
will continue to be one of the lowest cost copper producers and that competition
from lower cost producers will not have a material adverse effect on the
business, financial condition, results of operations or prospects of the
Company.
 
     Depending on metal markets and other conditions, the Company may enter into
forward sales or purchase put options or establish synthetic put options to
reduce the risk of copper price declines on its anticipated future production.
From time to time, the Company has hedged a portion of its copper production,
and subject to market conditions, may choose to pursue such opportunities in the
future. All hedging activity is reviewed by a senior management committee and
reported to the Board of Directors.
 
     For the full year 1996, the Company sold or exercised put options covering
151.2 million pounds of copper for a pre-tax gain of $11.1 million. Earnings for
the first six months included a pre-tax gain of $5.6 million in 1997 and a
pre-tax loss of $0.3 million in 1996 from the Company's price protection
program. There were no pre-tax gains or losses from price protection in the
second quarter of 1997 compared with a pre-tax gain of $0.5 million in the
second quarter of 1996. At June 30, 1997, the Company held copper put options,
with a strike
 
                                       24
<PAGE>   27
 
price of 95 cents, for 94.1 million pounds of fourth quarter 1997 production and
44 million pounds of first quarter 1998 production. The Company has purchased
put options covering portions of its copper production in the past and,
depending on metal markets and other conditions, may purchase put options or
employ other metal price hedging strategies in the future in order to reduce the
risk of copper price declines on its anticipated future production. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Metal Hedging and Trading Activity", "Business and
Properties -- Sales of Metals and Hedging".
 
  Expansion and Modernization Program
 
     The proceeds of the Offering of Old Notes will be used by the Company, in
part, to fund the expansion and modernization program. The expansion and
modernization program is being undertaken by the Company in order to enhance the
competitive position and financial performance of the Company and to comply with
Peruvian environmental regulations applicable to its operations. The Company's
modernization plan for the Ilo smelter is designed to avoid significant
disruptions in smelter production of blister copper during construction. The
modernization project has two phases: installation of a flash furnace and
replacement of existing converter operations. During the first phase, which is
expected to be completed in 2001, the Company plans to operate two existing
reverberatory furnaces until the new flash smelting furnace reaches design rates
of production. During the second phase, the Company expects to continue to
operate its existing converters until the new units are operating at design
capacity. However, there can be no assurance that current production levels will
be maintained during the modernization, that there will be no interruptions of
production or that the costs of the modernization will not significantly exceed
management's current estimates. See "Summary -- The Company -- Expansion and
Modernization Program".
 
     Any failure to complete, or any significant delay in completion of, the
smelter modernization could have a material adverse effect on the business,
financial condition, results of operations or prospects of the Company, if the
Company were required to reduce or cease copper production due to failure to
comply with the PAMA. Under the PAMA, the Company has until January 2007 to
achieve compliance with environmental controls applicable to the smelter.
Although the Company believes that its modernization plan, which calls for
completion by the year 2003, provides sufficient time to meet this schedule,
there can be no assurance that the smelter modernization will be completed by
such date. See "-- Impact of Government Regulation".
 
     The Company's expansion and modernization program has an estimated capital
cost of $1 billion to be spent over approximately six years. Although management
expects that cash from existing and future operations and from the issuance of
SENs and borrowings under the Credit Facility and from anticipated borrowings in
the future will be sufficient to cover the costs of the Company's capital
investment plan, there can be no assurance that the Company will not be required
to seek additional funds in order to complete its expansion and modernization
program. Following the Offering of Old Notes and borrowings under the Credit
Facility there can be no assurance that the Company's increased leverage will
not have an adverse impact on the Company's liquidity. If additional funds are
necessary, there can be no assurance that the Company will be able to obtain the
required funds on terms and conditions acceptable to the Company. If such
additional financing is unavailable, the Company may have to delay completion of
the expansion and modernization program until additional financing or sufficient
internally generated funds become available and any such delay could have a
material adverse effect on the business, financial condition, results of
operations or prospects of the Company.
 
  Supply and Cost of Fuel Oil and Electricity
 
     The Company requires substantial amounts of fuel oil and electricity for
its operations and energy costs constitute a substantial portion of the
Company's cost of production. Although the Company believes that fuel oil and
electricity are available to it in adequate quantities at market prices, the
availability and prices may be subject to curtailment or change due to, among
other things, new laws or regulations, imposition of new taxes or tariffs,
interruptions in production by suppliers, worldwide price levels and market
conditions. During the 1970s and 1980s, the Company's ability to import fuel oil
was restricted by government policies. The Company was required to purchase fuel
oil domestically from a government-owned oil producer at prices substantially
above those prevailing in the world market. The Company has recently sold its
power facility to a wholly owned subsidiary of Tractebel S.A. ("Tractebel").
Tractebel has agreed to provide electricity to meet SPCC's requirements for the
next 20 years, including increased requirements as a result of the expansion and
modernization program. Under this agreement, the Company's cost of power will
increase somewhat from its
 
                                       25
<PAGE>   28
 
current level, while the Company will benefit by avoiding significant capital
expenditures. The Company believes it will be able to import sufficient fuel oil
and, under this agreement, will have sufficient electricity to meet its needs.
Nevertheless, a protracted interruption in the supply of fuel oil or
electricity, or substantial increases in fuel oil or electricity costs, could
have a material adverse effect on the business, financial condition, results of
operations or prospects of the Company. See "Business and
Properties -- Electrical Power" and "-- Other Facilities and Water Resources".
 
  Labor Matters
 
     Approximately 60% of the Company's workforce is represented by labor
unions. The Company recently entered into new five-year collective bargaining
agreements with its nine labor unions, which replaced the previous three-year
contracts. Although management believes its present labor relations are
generally good, the Company has, in the past, experienced work stoppages and
strikes. Most of these work stoppages have been of only a few days' duration,
although the Company has experienced more protracted strikes, including one for
approximately 145 days in 1988, but since 1991 only five days have been lost due
to work stoppages. There can be no assurance that a work stoppage or strike will
not occur prior to expiration of the current labor agreements or during
negotiations on new labor agreements (including extensions of the existing labor
agreements) or as to the effect of any such work stoppage or strike on the
Company's production levels. Work stoppages or other labor-related developments
affecting the Company could have a material adverse effect on the business,
financial condition, results of operations or prospects of the Company. See
"Business and Properties -- Employees".
 
  Program Collateralized by Substantially All Receivables
 
     Security for the Notes consists solely of (i) the Export Receivables of SP
Limited under export contracts for the sale of copper products outside of Peru,
(ii) the Note Reserve Account and (iii) the Note Collateral Account. On any day,
in the absence of a Retention Trigger Event or Debt Service Retention Event,
Collections in respect of Export Receivables that are deposited to the
Collection Account and the Note Collateral Account will be released to SP
Limited.
 
     Substantially all of SP Limited's export receivables will be pledged to the
Collateral Trustee in connection with the Credit Facility and SENs to be issued
under the Program. The Notes permit the Collateral Trustee to retain Collections
or portions thereof in the Note Collateral Account in the event of certain
Trigger Events, Accelerated Amortization Events and Events of Default. In
addition, the terms of the Credit Facility permit the Collateral Trustee to
retain amounts deposited to the Credit Facility Collateral Account upon the
occurrence of certain Blocking Events under the SENs and upon the occurrence and
continuance of an Event of Default under the Credit Facility. See "Description
of Credit Facility". It is possible under such circumstances that Blocked
Collections under the Notes, the Credit Facility and any subsequent SENs series
would represent a significant portion of the Company's operating cash flow. Any
reduction in cash flow available to the Company to fund its operations on a
day-to-day basis could affect its ability to produce copper and meet the
delivery requirements of its customers. If the Company's operations were
significantly curtailed as a result of reduced cash flow available to fund
operations during a Blocking Event, the Company's ability to meet its
obligations under sales contracts in respect of Export Receivables securing the
Notes during the pendency and after the curing of such Blocking Event would be
materially and adversely affected, as would the business, financial condition,
results of operations and prospects of the Company.
 
  Receivables Excluded from the Program
 
   
     Certain receivables of SP Limited in respect of export copper sales are
excluded from the lien and security interest granted by SP Limited to the
Collateral Trustee. Specified export contracts covering up to 40,000 tons
annually which may secure other debt arrangements of SP Limited may be excluded.
Also, SP Limited may exclude, on an annual basis, additional export contracts
providing for sales of copper up to an aggregate annual amount equal to the sum
of (i) 10% of Net Certified Export Sales and (ii) Excess Certified Export Sales
(as defined herein), if any, in such calendar year, with proportionate
adjustments for exclusions occurring after commencement of the calendar year.
See "Description of Notes -- Excluded Receivables".
    
 
                                       26
<PAGE>   29
 
  Effects of U.S. Bankruptcy Law
 
     The principal collateral for the Notes is the percentage security interest
in favor of the Collateral Trustee for the benefit of the holders of Notes in
the Export Contracts and Export Receivables to be generated in the future from
time to time. The amount of Export Receivables in existence at any time in which
the Notes will have a percentage security interest will only represent a small
portion of the Program Amount. In addition, under Section 552 of the United
States Bankruptcy Code (the "Bankruptcy Code"), assets that are acquired by a
debtor in a U.S. bankruptcy proceeding after the commencement of bankruptcy
proceedings are not subject to a security interest created by such debtor before
such commencement unless such assets constitute "proceeds, product, offspring,
or profits of such property," in which case such assets would be subject to the
security interest except to the extent that the bankruptcy court, after notice
and a hearing and based on the equities of the case, orders otherwise. As a
result, even if Export Receivables continue to be generated after the
commencement of U.S. bankruptcy proceedings involving SP Limited, it is unlikely
that such Export Receivables will be subject to the security interest in favor
of the Collateral Trustee on behalf of holders of Notes or any other Secured
Party.
 
     Under the terms of the Amended and Restated Collateral Trust Agreement, the
Collateral Trustee would have the right, and would be required in certain
circumstances, to sell the Collateral in order to pay the principal of, and
accrued interest on, the Notes and debt held by other Secured Parties. However,
upon the commencement of bankruptcy proceedings in which SP Limited is a debtor,
the Collateral Trustee will be stayed from foreclosing upon and selling the
Collateral. Even if the Collateral Trustee were able to exercise its remedies,
in light of the foregoing discussion of the scope of the security interest, it
is likely the proceeds allocable to the Notes from the sale of the Collateral
would not be sufficient to pay the aggregate outstanding principal balance of
the Notes plus accrued interest. In any plan of reorganization or liquidation
under the Bankruptcy Code, secured creditors are entitled to receive their
collateral or other consideration that provides the equivalent thereof. However,
the Trustee's claim on behalf of the holders of Notes, to the extent not covered
by the Collateral, would be unsecured and would rank pari passu in priority of
payment with all other senior unsecured creditors of the Company (subject to
certain statutory preferences) and the amount, if any, recoverable in respect of
such claim, as with other unsecured debt obligations of SP Limited, would depend
upon the outcome of the U.S. bankruptcy proceeding.
 
  Enforceability of Judgments under Peruvian Law
 
     Substantially all of the assets of SP Limited are located in Peru and are
held by the Branch in Peru. In the event that the holders were to obtain a
judgment in the United States against SP Limited or SPCC and seek to enforce
such judgment in Peru, the holders' ability to enforce the judgment in Peru
would be subject to Peruvian laws regarding enforcement of foreign judgments. In
general, Peruvian law provides that a judgment of a competent court outside of
Peru rendered against SP Limited or SPCC in connection with an action arising
out of or relating to the Notes or the other Transaction Documents (as defined
herein), would be recognized and could be enforced against the assets of the
Branch in Peru, subject to the following statutory limitations set forth in the
Peruvian civil code: (i) the judgment must not resolve matters for which
exclusive jurisdiction of Peruvian courts applies (i.e., disputes relating to
real estate located in Peru); (ii) the competence of the foreign court which
issued the judgment must be recognized by Peruvian conflict of laws rules; (iii)
the party against whom the judgment was obtained must have been properly served
in connection with the foreign proceedings; (iv) the judgment of the foreign
court must be a final judgment, not subject to any further appeal; (v) no
pending proceedings may exist in Peru among the same parties and on the same
subject; (vi) the judgment by the foreign court cannot be in violation of public
policy; and (vii) the foreign court must grant reciprocal treatment to judgments
issued by Peruvian courts.
 
     Moreover, there can be no assurance that a judgment rendered against SP
Limited or SPCC in the United States in a bankruptcy-related action would be
enforceable against the assets of the Branch in Peru or that a Peruvian court
would not assert jurisdiction in a bankruptcy proceeding relating to SP Limited.
 
  Guarantee by SPCC
 
     SPCC is a holding company with no independent operations and no significant
assets other than its ownership of the capital stock of SP Limited. It will,
therefore, be dependent upon the receipt of dividends or other distributions
from SP Limited to fund any obligations that it incurs, including obligations
under the
 
                                       27
<PAGE>   30
 
Guarantee. Accordingly, if SP Limited should at any time be unable to make
distributions to SPCC, SPCC's ability to meet its obligations under the
Guarantee would be materially and adversely affected.
 
  Impact of Government Regulation
 
     The Company's activities in Peru are dependent on concessions previously
granted by the government with respect to the Company's mining rights and
compliance by the Company with certain agreements entered into with the Peruvian
government. The concessions are in full force and effect under applicable
Peruvian laws and the Company is in compliance with all material terms and
requirements applicable to the concessions and is not under any condition,
occurrence or event that would cause the revocation, cancellation, lapsing,
expiration or termination thereof. The Company may, from time to time, let
lapse, revoke, cancel or terminate concessions that are not material to the
conduct of its business. The principal concessions include the mining and
processing concessions at Toquepala and Cuajone, the processing concessions for
the smelter and refinery and the mining and processing concessions for the SX/EW
facility. The concessions each have an indefinite term, subject to payment of
concession fees which totaled $183,300 in 1996.
 
     The Peruvian government has recently adopted environmental regulations
requiring various industrial companies operating in Peru to enter into
agreements with the government, pursuant to which they will undertake programs
to reduce, control or eliminate emission generations and/or waste discharges.
The Company's PAMA was approved by the Peruvian government in January 1997. See
"-- Expansion and Modernization Program", "Business and Properties" and
"Regulatory Framework -- Regulations, Permitting and Environmental Matters". The
Company has also entered into agreements from time to time with the Peruvian
government relating to taxes, exchange controls, repatriation of earnings and
investments and other matters which affect its business, financial condition and
results of operations. No assurance can be given that the Peruvian government
will not in the future demand changes to the terms and conditions of any of
these agreements, including the PAMA, or impose other conditions that may
adversely affect the Company's financial condition or results of operations.
 
     The Company's exploration, mining, milling, smelting and refining
activities are also subject to Peruvian laws and regulations which change from
time to time. Matters subject to regulation include, but are not limited to,
concession fees, transportation, production, reclamation, export, taxation,
labor standards, mine safety and occupational health. Although the Company
believes that it is in substantial compliance with all applicable laws, the
effect of any future regulatory changes on the Company's operations cannot
presently be determined. See "Regulatory Framework -- Regulations, Permitting
and Environmental Matters".
 
FACTORS RELATING TO PERU
 
  Political and Economic Situation
 
     During the past 30 years, Peru has experienced political instability under
both civilian and military governments. These governments have pursued various
policies, including frequent intervention in the economy and social structure.
Past governments have imposed controls on prices, exchange rates, local and
foreign investment and international trade, restricted the ability of companies
to dismiss employees, expropriated private sector assets and prohibited the
remittance of profits to foreign investors.
 
     Since the current administration took office in July 1990, the Peruvian
government has implemented a broad-based reform of Peru's political system,
economy and social conditions, aimed at stabilizing the economy, restructuring
the national government by reducing bureaucracy, privatizing state-owned
companies, promoting private investment, developing and strengthening free
markets, institutionalizing democratic representations, and enacting programs
for the strengthening of basic services related to education, health, housing
and infrastructure. Congress was dissolved in April 1992 and a democratically
elected congressional body was reestablished in November 1992. A new
Constitution was enacted and ratified in the fourth quarter of 1993. Under the
current administration, inflation as measured by the Peruvian Instituto Nacional
de Estadstica e Informatica (INEI) consumer price index has decreased from
7,650% in 1990 to 10.2% in 1995 and was 11.8% for 1996. In addition, the
country's gross domestic product ("GDP") in real terms increased by 5.3% in
1993, 12.8% in 1994, 6.9% in 1995 and 2.5% in 1996.
 
                                       28
<PAGE>   31
 
     In April 1995, the incumbent president was reelected to a second five-year
term of office with approximately 64% of the vote. Additionally, the
administration's political party, the Cambio 90 -- Nueva Mayora, won a majority
of the seats in Congress. Notwithstanding the progress achieved in restructuring
Peru's political institutions and revitalizing the economy during the
administration's first term, there can be no assurance that the current
administration or future administrations can sustain such progress. While the
Peruvian economy has experienced strong growth in recent years, there can be no
assurance that such growth will continue at similar rates in the future or at
all. The Company's results of operations and financial condition could also be
affected by changes in economic or other policies of the Peruvian government or
other political or economic developments in Peru.
 
  Exchange Controls
 
     During the 1970s and 1980s, government policies restricted the ability of
the Company and its Branch to, among other things, repatriate funds and import
products, including oil, from abroad. In addition, currency exchange rates were
strictly controlled and all export sales revenues were required to be deposited
in Peru's Central Reserve Bank where they were exchanged from U.S. Dollars to
the then local currency at less-than-market rates of exchange. These policies
generally affected the results of operations of the Company and the Branch
similarly. Controls on repatriation of funds limited the ability of the
Company's stockholders to receive dividends outside of Peru, but did not limit
the ability of holders of Labor Shares to receive distributions of earnings in
Peru. The current Peruvian legal framework imposes no restrictions on the
ability of a company operating in Peru to transfer foreign currency from Peru to
other countries or to convert Peruvian currency into foreign currency or foreign
currency into Peruvian currency. Prior to 1991, Peru had restrictive exchange
controls and exchange rates. In the 1970s and 1980s, all foreign exchange
proceeds were required to be deposited with the Central Reserve Bank of Peru.
During this period the Company, under a bilateral agreement with the Central
Reserve Bank of Peru, was allowed access to foreign currency derived from its
export sales to make debt service payments on its foreign currency obligations.
Under this agreement, proceeds from the Company's exports were paid into an
account held in trust for the Central Reserve Bank of Peru at Chase Manhattan
Bank in New York. Pursuant to irrevocable instructions from the Central Reserve
Bank of Peru, the trustee was allowed to transfer funds to the Company's
accounts to pay for such items as debt service, imports and dividends. During
the period of exchange controls and restricted access to foreign currency, the
Company repaid all of its debts on time as scheduled. Notwithstanding the
Company's ability to service its debt during previous periods of government
exchange controls, there can be no assurance that the Peruvian government will
continue its current policy of permitting currency transfers and conversions
without restriction or that the Company would be able to timely service its debt
obligations were the Peruvian government to reinstitute exchange controls.
 
  Terrorist Activity
 
     Peru experienced significant terrorist activity in the 1980s and early
1990s, during which period anti-government groups escalated their acts of
violence against the government, the private sector and Peruvian residents.
According to Peruvian government estimates, terrorist activity in Peru during
the last sixteen years has resulted in an estimated 25,000 deaths and damage to
property and the economy is estimated at US$25 billion. The Company's operations
have not been directly affected by the terrorist activity.
 
     There has been substantial progress in suppressing terrorist activity since
1990, in part as a result of the arrest of the leaders and approximately 2,000
members of the two principal terrorist groups. Approximately 6,000 additional
persons have agreed to cooperate with the government under an amnesty law.
Notwithstanding the success achieved, some incidents of terrorist activity
continue to occur, including the hostage incident at the residence of the
Japanese Ambassador to Peru, which was resolved earlier this year. There can be
no assurance that the progress achieved in combating terrorist activity can be
sustained.
 
  Inflation and Currency Devaluation
 
     Peru has in the past experienced high levels of inflation. However, the
inflation rate in Peru, as measured by the INEI consumer price index, fell from
7,650% in 1990 to 139.2% in 1991, 56.7% in 1992, 39.5% in 1993, 15.4% in 1994
and 10.2% in 1995. In 1996, the inflation rate was 11.8%. Although the Peruvian
government's
 
                                       29
<PAGE>   32
 
   
stabilization plan has significantly reduced inflation, there can be no
assurance that domestic inflation will not increase from its current level. In
addition, the Peruvian currency has been devalued numerous times during the last
20 years. The devaluation rate was 4,019.3% in 1990, 83.7% in 1991, 69.1% in
1992, 31.7% in 1993, 1.4% in 1994 and 6.0% in 1995. In 1996, the devaluation
rate was 12.1%. A portion of the operating costs of the Company are denominated
in Soles and therefore could be significantly affected by the rate of inflation
in Peru. If inflation in Peru were to increase without a corresponding
devaluation of the Sol, the financial position and results of operations of the
Company could be materially and adversely affected.
    
 
     The Company generally does not enter into currency hedging arrangements, as
substantially all of the Company's sales are denominated in U.S. Dollars.
 
  Taxation of Non-Peruvian Individuals
 
     Payments of interest on the Notes to holders that are not (a) corporations,
partnerships or trusts organized under the laws of the United States or a State
thereof or (b) a corporation or other entity organized or established under the
laws of any other jurisdiction outside Peru and that are domiciled outside Peru
will be subject to income tax withholding in Peru, currently at a rate of 30%,
for which no Additional Amounts will be paid. As a consequence, no Additional
Amounts will be payable to individuals or estates. Therefore, such holders could
face adverse tax consequences if they purchase the Notes. See
"Taxation -- Peruvian Taxation".
 
OTHER FACTORS
 
  Certain Loan Agreement Restrictions
 
     SP Limited has entered into an agreement with a group of lenders to loan
funds under the Credit Facility. Under the Credit Facility, the Company may
borrow up to $600 million, including $200 million available under a revolving
credit facility. The Credit Facility will be secured with a percentage interest
in the Export Contracts and the Export Receivables thereunder. See
"Summary -- Transaction Structure". Under the terms of the Credit Facility, SPCC
has covenanted, among other things, to maintain a Consolidated Tangible Net
Worth (as defined therein) of $750 million and a debt to capitalization ratio of
 .50 to 1.00. Further, SPCC may not fail, at the end of two consecutive fiscal
quarters, to have an EBITDA (earnings before interest, taxes, depreciation and
amortization) to interest coverage ratio for the most recent twelve months of at
least 1.5 to 1. See "Description of the Credit Facility". The Credit Facility
also provides that upon an event of default, rather than remitting the daily
Collections deposited to the Credit Facility Collateral Account (as defined
therein) to the Company, the Collateral Agent will retain Collections from the
percentage of the Export Receivables allocated as security to the Credit
Facility for thirty days and, if required thereafter by the Required Lenders (as
defined therein), until the event of default has been cured.
 
     As of June 30, 1997, SP Limited had 94.7 million of debt outstanding under
loan agreements with Corporacion Andina de Fomento ("CAF"), Mitsui & Co. Ltd.
("Mitsui") and the Export Import Bank of the United States ("U.S. Eximbank"), as
well as $50 million of bonds outstanding in Peru and $150 million of Old Notes,
which are expected to be exchanged for New Notes pursuant to the Exchange Offer.
In addition, SP Limited had available $600 million under the Credit Facility.
See "Description of Credit Facility". On July 31, 1997, SP Limited prepaid the
$40.0 million balance outstanding on the Mitsui loan. As security for the CAF
loan, SP Limited has pledged certain SX/EW concessions and has granted CAF a
mortgage on the SX/EW facility. SP Limited also maintains an escrow account
equal to six months' debt service under the CAF loan agreement. A default by SP
Limited on the CAF loan could result in CAF's commencing foreclosure proceedings
on the SX/EW facility. U.S. Eximbank has a security interest in the receivables
under annual copper sales contracts covering 7,700 tons of copper production and
in an escrow account equal to six months' debt service under the loan. The CAF
loan agreement contains covenants requiring, among other things, maintenance of
a ratio of long-term debt to stockholders' equity and minimum stockholders'
equity of at least $750 million. The U.S. Eximbank loan agreement contains
covenants requiring a minimum ratio of current assets to current liabilities and
compliance with a limitation on total long-term liabilities.
 
                                       30
<PAGE>   33
 
     Any reduction of (or commitment to reduce) Asarco's direct or indirect
voting interest in the Company to 50% or less would constitute an event of
default under certain of the financing agreements including the Credit Facility.
 
  Voting Rights; Effective Control by Principal Stockholders
 
     The Company has outstanding two classes of capital stock: the common stock
and Class A common stock. The Company's Board of Directors is composed of 15
members. Two directors are elected by the holders of common stock, voting as a
separate class; one director is the President of the Company and 13 directors
(including the President) are elected by the holders of Class A common stock,
voting as a separate class. On all other matters with respect to which the
Company's stockholders have voting rights, each share of Common Stock is
entitled to one vote and each share of Class A common stock is entitled to five
votes. Class A common stockholders and the Company have entered into an
agreement (the "Stockholders' Agreement") which, in accordance with the terms of
the Company's Restated Certificate of Incorporation provides that the Class A
common stockholders are entitled to elect 13 of the 15 directors of the Company.
Based on its ownership of Class A common stock and the terms of the
Stockholders' Agreement, Asarco nominates and elects a majority of the directors
of the Company and determines the outcome of substantially all actions requiring
stockholder approval. See "Summary -- The Company -- Principal Stockholders" and
"Certain Transactions -- Stockholders' Agreement".
 
  Absence of Public Market
 
     The New Notes will be a new issue of securities for which there is
currently no public market. The Issuer does not intend to apply for listing of
the New Notes on any securities exchange or for quotation through the National
Association of Securities Dealers Automated Quotation System. There can be no
assurance that an active trading market for the New Notes will develop. If a
trading market develops for the New Notes, future trading prices of such
securities will depend on many factors, including prevailing interest rates, the
Issuer's results of operations and financial condition and the market for
similar securities.
 
                       RATIO OF EARNINGS TO FIXED CHARGES
 
     The following table sets forth the Company's consolidated ratio of earnings
to fixed charges for the periods shown.
 
<TABLE>
<CAPTION>
                          SIX MONTHS ENDED
                              JUNE 30,                           YEAR ENDED DECEMBER 31,
                        ---------------------   ---------------------------------------------------------
                          1997        1996        1996        1995        1994        1993        1992
                        ---------   ---------   ---------   ---------   ---------   ---------   ---------
<S>                     <C>         <C>         <C>         <C>         <C>         <C>         <C>
Ratio of earnings to
  fixed charges.......      20.26       21.49       19.95       23.35       15.14      123.57      294.51
</TABLE>
 
     The ratio of earnings to fixed charges has been computed by dividing
operating income by interest expense.
 
                                       31
<PAGE>   34
 
                                 CAPITALIZATION
 
     The following table sets forth the capitalization of SPCC as of June 30,
1997.
 
<TABLE>
<CAPTION>
                                                                                JUNE 30, 1997
                                                                            ----------------------
                                                                            (DOLLARS IN THOUSANDS)
<S>                                                                         <C>
Short-term debt:
  Current portion of long-term debt.......................................        $   23,683
Long-term debt:
  $35 Million Export Financing Credit Agreement, term loan maturing 1996
     through 2001.........................................................            17,500
  $60 Million CAF Credit Facility, term loan maturing 1996 through 2001...            23,550
  $50 Million Mitsui Credit Facility, term loan maturing 1996 through
     2001.................................................................            30,000
  $600 Million Credit Facility, term and revolving loans maturing 2000
     through 2004.........................................................                 0
  $150 Million SENS.......................................................           150,000
  $50 Million Bond Issue..................................................            50,000
          Total long-term debt............................................           271,050
Minority interest of labor shares in the Branch...........................            22,094
 
Stockholder's equity:
  Common Stock, $0.01 par value, 34,099,167 shares authorized; 14,302,149
     shares outstanding...................................................               143
  Class A Common Stock, $0.01 par value, 65,900,833 shares authorized;
     65,900,833 shares outstanding........................................               659
  Additional paid-in capital..............................................           265,745
  Retained earnings.......................................................           812,242
  Treasury stock at cost, 27,944 shares...................................              (472)
          Total stockholders' equity......................................         1,078,317
          Total capitalization(1).........................................        $1,395,144
          Debt to Capital Ratio...........................................             21.13%
</TABLE>
 
- ---------------
(1) Total capitalization represents the sum of total long-term debt, minority
    interest of labor shares in the Branch and total stockholders' equity.
 
                                       32
<PAGE>   35
 
              SELECTED SUMMARY CONSOLIDATED FINANCIAL INFORMATION
 
     The following summary financial information of SPCC and its consolidated
subsidiaries, as of and for each year in the five years ended December 31, 1996
has been derived from the consolidated financial statements audited by Coopers &
Lybrand, L.L.P., independent accountants. The summary financial information as
of and for the six months ended June 30, 1997 and June 30, 1996 is unaudited. In
the opinion of management, all adjustments (consisting only of normal recurring
accruals) have been made to present fairly on a basis consistent with generally
accepted accounting principles the condensed consolidated balance sheet and
statements of earnings for such periods. The results of operations for the six
months ended June 30, 1997 are not necessarily indicative of results for the
year ending December 31, 1997. This information is qualified in its entirety by,
and should be read in conjunction with, the Consolidated Financial Statements
and the related notes thereto included elsewhere and incorporated herein by
reference in this Prospectus.
 
   
<TABLE>
<CAPTION>
                                           SIX MONTHS ENDED JUNE
                                                    30,                             YEAR ENDED DECEMBER 31,
                                          -----------------------   --------------------------------------------------------
                                             1997         1996         1996         1995        1994       1993       1992
                                          ----------   ----------   ----------   ----------   --------   --------   --------
                                                (DOLLARS IN THOUSANDS, EXCEPT FOR PER SHARE AMOUNTS AND COPPER PRICE)
<S>                                       <C>          <C>          <C>          <C>          <C>        <C>        <C>
CONSOLIDATED STATEMENTS OF EARNINGS:
  Net sales.............................     441,008   $  369,577   $  753,032   $  928,840   $701,678   $547,511   $622,033
  Operating costs and expenses(1).......     291,658      233,371      504,267      562,183    559,651    477,326    490,094
  Operating income......................     149,350      136,206      248,765      366,657    142,027     70,185    131,939
  Minority interest of labor shares in
    income of the Branch................       3,418        3,364        5,208       43,558     18,610     11,218     20,510
  Earnings before cumulative effect of
    the change in accounting
    principle...........................     115,416       94,337      180,512      217,754     91,224     29,130     45,638
  Cumulative effect of the change in
    accounting principle................          --           --           --           --         --    165,092(2)      --
                                          ----------   ----------   ----------   ----------   --------   --------   --------
  Net earnings..........................  $  115,416   $   94,337   $  180,512   $  217,754   $ 91,224   $194,222   $ 45,638
                                          ==========   ==========   ==========   ==========   ========   ========   ========
PER SHARE AMOUNTS(3)
  Earnings before cumulative effect of
    the change in accounting
    principle...........................  $     1.44   $     1.18   $     2.25   $     3.31   $   1.39   $   0.45   $   0.69
  Cumulative effect of the change in
    accounting principle................          --           --           --           --         --       2.51         --
  Net earnings..........................        1.44         1.18         2.25         3.31       1.39       2.96       0.69
  Dividends paid........................        0.65         0.95         1.47         1.27       0.33       0.27       0.23
BALANCE SHEET INFORMATION (END OF
  PERIOD):
  Cash and marketable securities........     419,115   $  237,737   $  174,205   $  262,099   $136,333   $ 67,548   $ 83,073
  Working capital.......................     608,816      318,129      297,795      312,476    242,384    184,761    164,587
  Net property..........................     854,632      811,345      855,808      779,368    522,850    390,719    390,187
  Total assets..........................   1,612,814    1,255,757    1,279,849    1,271,701    968,506    727,951    723,253
  Long-term debt........................     271,050      105,397       82,892       76,828    114,118     15,600         --
  Total liabilities and minority
    interest............................     534,497      285,279      264,822      318,214    333,657    162,911    334,435
  Stockholders' equity..................   1,078,317      970,478    1,015,027      953,487    634,849    565,040    388,818
OTHER ITEMS:
  Depreciation, amortization and
    depletion...........................  $   23,107   $   20,670   $   41,623   $   35,952   $ 39,742   $ 34,601   $ 32,491
  Capital expenditures..................      61,354       51,931      120,803      183,041    181,912     31,859     23,063
  Cash dividends........................      52,125       76,204      117,913       83,747     21,415     18,000     15,000
  Ratio of earnings to fixed
    charges(4)..........................       20.26        21.49        19.95        23.35      15.14     123.57     294.51
  Average LME Copper Price (per
    pound)..............................  $     1.12   $     1.14   $     1.04   $     1.33   $   1.05   $   0.87   $   1.04
</TABLE>
    
 
- ---------------
(1) Includes provision for workers' participation of $10.9 million, $10.4
    million, $18.0 million, $32.2 million, $13.9 million, $8.8 million and $14.1
    million in the six months ended June 30, 1997 and 1996 and in years ended
    December 31, 1996, 1995, 1994, 1993 and 1992, respectively.
 
(2) Represents the cumulative effect, as of January 1, 1993, of adopting
    Statement of Financial Accounting Standards ("SFAS") No. 109 "Accounting for
    Income Taxes".
 
(3) Per share amounts are presented after giving retroactive effect to a 100 to
    1 stock split declared and made on November 4, 1994.
 
(4) The ratio of earnings to fixed charges has been computed by dividing
    operating income by interest expense.
 
                                       33
<PAGE>   36
 
                     SELECTED SUMMARY OPERATING INFORMATION
 
     The following table presents summary production and sales data for the
Company for the periods indicated. For more information regarding such data, see
"Business and Properties".
 
<TABLE>
<CAPTION>
                                SIX MONTHS ENDED JUNE
                                         30,                                    YEAR ENDED DECEMBER 31,
                               ------------------------    ------------------------------------------------------------------
                                  1997          1996          1996          1995          1994          1993          1992
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
<S>                            <C>           <C>           <C>           <C>           <C>           <C>           <C>
COPPER MINING OPERATIONS
  Ore Mined (in tons):
    Toquepala mine...........   9,302,000     8,984,000    18,609,000    16,937,000    15,907,000    16,044,000    15,559,000
    Cuajone mine.............  10,499,000    10,321,000    21,249,000    21,378,000    21,785,000    21,409,000    21,471,000
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............  19,801,000    19,305,000    39,858,000    38,315,000    37,692,000    37,453,000    37,030,000
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
  Average Copper Ore Grade:
    Toquepala mine...........        0.74%         0.87%         0.81%         0.86%         0.80%         0.83%         0.85%
    Cuajone mine.............        0.93%         0.95%         0.96%         0.79%         0.84%         0.83%         0.86%
         Weighted Average....        0.84%         0.91%         0.89%         0.82%         0.82%         0.83%         0.86%
COPPER PRODUCTION
  (contained copper in tons):
  Mines
    Toquepala mine...........      60,067        63,780       126,464       128,064       111,797       115,047       113,232
    Cuajone mine.............      83,180        80,922       166,006       145,491       156,037       150,410       157,946
    SX/EW(2).................      24,029        22,658        46,585         5,006            --            --            --
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............     167,276       167,360       339,055       278,561       267,834       265,457       271,178
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
ILO SMELTER (blister copper
  in tons)
  From SPCC concentrates.....     124,984       137,643       294,997       268,761       268,432       265,046       268,407
  From purchased
    concentrates.............      13,700         8,255        21,807        48,467        53,671        47,749        35,482
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............     138,684       145,898       316,804       317,228       322,103       312,795       303,889
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
REFINED COPPER (in tons)(1)
  Cathode production (for
    SPCC)....................     125,715       101,871       219,800       216,207       210,671       198,375       197,059
  SX/EW(2)...................      24,029        22,658        46,585         5,006            --            --            --
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............     149,744       124,529       266,385       221,213       210,671       198,375       197,059
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
SILVER PRODUCTION (troy
  ounces contained in
  blister):
  From SPCC concentrates.....   1,369,147     1,434,195     3,096,506     2,957,670     2,979,199     2,813,242     2,675,094
  From purchased
    concentrates.............     167,573        87,787       192,684       605,244       555,511       444,983       345,686
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............   1,536,720     1,521,982     3,289,190     3,562,914     3,534,710     3,258,225     3,020,780
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
MOLYBDENUM PRODUCTION (in
  tons contained in
  concentrates):.............       2,198         1,913         4,370         4,004         3,060         3,156         3,542
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
COPPER SALES (in tons):
  Refined....................     150,539       124,849       265,936       223,006       212,388       200,447       191,977
  In blister.................      27,436(3)     40,574        81,209       100,296       114,173       106,223       102,555
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............     177,975       165,423       347,145       323,302       326,561       306,670       294,532
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
COPPER EXPORTS (in tons):
  Refined....................     139,677       123,261       257,151       223,006       212,388       200,447       191,977
  In blister.................      27,436(3)     40,574        80,604       100,296       114,173       106,223       102,555
                               ----------    ----------    ----------    ----------    ----------    ----------    ----------
         Total...............     167,113       163,835       337,755       323,302       326,561       306,670       294,532
                               ==========    ==========    ==========    ==========    ==========    ==========    ==========
</TABLE>
 
- ---------------
(1) The Ilo refinery was purchased by the Company in May 1994. The data prior to
    the acquisition reflects cathode production for SPCC on a toll basis.
 
(2) The SX/EW facility commenced production in November 1995.
 
(3) In the six months ended June 30, 1997 copper sales and copper exports in
    blister included 9,977 tons of copper contained in concentrate.
 
                                       34
<PAGE>   37
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     The following discussion should be read in conjunction with the
Consolidated Financial Statements and Notes thereto included elsewhere and
incorporated herein by reference in this Prospectus as well as the data set
forth in "Selected Consolidated Financial Information".
 
OVERVIEW
 
     The Company's business is affected by the factors outlined below which
should be considered in reviewing the financial position, results of operations
and cash flows of the Company for the periods described herein.
 
     Inflation and Devaluation of the Peruvian Sol.  A portion of the Company's
operating costs are denominated in Peruvian Soles. Since the revenues of the
Company are primarily denominated in U.S. dollars, when inflation in Peru is not
offset by a corresponding devaluation of the Sol, the financial position,
results of operations and cash flows of the Company could be adversely affected.
The Peruvian economy has improved significantly following the implementation of
the government's stabilization and reform plan in 1991. The recent inflation and
devaluation rates are as follows:
 
<TABLE>
<CAPTION>
                                                                           YEARS ENDED DECEMBER
                                                         SIX MONTHS                31,
                                                         ENDED JUNE       ----------------------
                                                          30, 1997        1996     1995     1994
                                                        -------------     ----     ----     ----
    <S>                                                 <C>               <C>      <C>      <C>
    Peruvian Inflation Rate...........................       4.14%        11.8%    10.2%    15.4%
    Sol/Dollar Devaluation Rate.......................       2.04%        12.1%     6.0%     1.4%
</TABLE>
 
     Peruvian Branch.  The consolidated financial statements included herein are
prepared in U.S. dollars and in accordance with U.S. GAAP. The Branch consists
of substantially all of the assets and liabilities of SPCC, associated with its
copper operations in the Republic of Peru. The Branch is registered with the
Peruvian government as a branch of a foreign mining company. The results of the
Branch are consolidated in the financial statements of the Company.
 
     The Branch maintains its books of account in Soles, prepares financial
information in accordance with Peruvian GAAP and reports such information to the
Peruvian government on this basis for purposes of calculating its Peruvian
income tax liability as well as amounts payable for workers' participation.
Since these amounts are determined on the basis of Peruvian GAAP, they cannot be
directly derived from the consolidated financial statements of the Company.
Peruvian GAAP requires the inclusion in the financial statements of the Branch
of the Result of Exposure to Inflation, which seeks to account for the effects
of inflation by adjusting the value of non-monetary assets and liabilities and
equity by a factor corresponding to wholesale price inflation rates during the
period covered by the financial statements. Monetary assets and liabilities are
not so adjusted.
 
RESULTS OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND JUNE 30, 1996
 
     The Company reported net earnings of $59.6 million, or $0.74 per share, for
the second quarter ended June 30, 1997 compared with net earnings of $45.2
million, or $0.56 per share, for the second quarter of 1996. For the six month
period ended June 30, 1997, the Company reported net income of $115.4 million or
$1.44 per share, compared with net income of $94.3 million or $1.18 per share in
the comparable 1996 period.
 
     The Company's earnings in the second quarter 1997 increased $14.4 million
compared with the comparable 1996 period. Higher sales prices for copper and
molybdenum, as well as a reduction in the Company's effective tax rate,
primarily due to a reinvestment tax incentive in Peru, contributed to the
increase in earnings. As a result of a sharp decline in copper prices in June of
1996, second quarter provisionally priced copper sales were adjusted. The impact
of the adjustment in the second quarter 1996 reduced sales by $13.8 million and
net earnings by $8.2 million.
 
     Net earnings for the six months ended June 30, 1997 increased $21.1
million, over the same period in 1996, primarily as a result of 1996 price
adjustments to provisionally priced sales, the reduction in the Company's
 
                                       35
<PAGE>   38
 
effective tax rate due to the reinvestment tax incentive allowed in Peru and
pre-tax gains of $5.6 million recorded in the first quarter of 1997 related to
the Company's price protection program.
 
     Copper mine production decreased 2% in the second quarter of 1997 compared
with the second quarter of 1996 to 170.1 million pounds. Ore grades at the
Company's Toquepala and Cuajone mines were lower; however, throughput and better
recoveries at the Company's concentrators offset much of the effect of the lower
grades. Copper mine production for the six month period ended June 30, 1997 was
approximately the same as in the comparable 1996 period.
 
     In the first quarter of 1997, the Government of Peru approved a
reinvestment allowance for the Company's program to expand the Cuajone mine. The
reinvestment allowance provides the Company with tax incentives in Peru and, as
a result, certain U.S. tax credit carryforwards, for which no benefit has
previously been recorded, are expected to be realized. The estimated net
earnings impact of the reduction in the Company's effective tax rate, as a
result of the reinvestment allowance, for the second quarter of 1997 is
approximately $4.5 million and $7.7 million for the six months ended June 30,
1997. Pursuant to the reinvestment allowance the Company will receive tax
deductions in Peru in amounts equal to the cost of the qualifying property
(approximately $245 million). As qualifying property is acquired, the book
carrying value of the qualifying property will be reduced to reflect the tax
benefit associated with the reinvestment allowance (approximately $73 million).
As a result, book depreciation expenses related to the qualifying property will
be reduced over its useful life (approximately 15 years).
 
   
     In the second quarter the Company placed $150 million of secured export
notes. In addition, a $50 million bond offering was sold in the Peruvian market.
At June 30, the Company had $419 million of cash and marketable securities and
an undrawn committed bank facility of $600 million. Under reasonable
assumptions, these funds are sufficient to assure the financing of the Company's
$1 billion expansion program which is proceeding on schedule. Construction
contracts for the Cuajone mine expansion have been awarded and site construction
commenced in July. Engineering work on the Ilo smelter expansion is also
underway.
    
 
     Net Sales:  Net sales in the second quarter of 1997 were $226.2 million,
compared with $173.2 million in the second quarter of 1996. Sales for the six
months ended June 30, 1997 were $441.0 million compared with $369.6 million for
the comparable 1996 period. The $53.0 million increase in net sales in the
second quarter of 1997 is primarily attributable to 1996 price adjustments to
provisionally priced sales, higher sales volume and higher copper and molybdenum
prices. The increase in sales in the six month period ended June 30, 1997 as
compared with the comparable prior year period reflects increased sales volume,
adjustments to provisionally priced sales in 1996 and the recognition of a $5.6
million gain on the sale of copper put options covering first quarter 1997
copper sales.
 
     At June 30, 1997, the Company has recorded sales of 73.6 million pounds of
copper, at a provisional price of $1.17 per pound. These sales are subject to
final pricing based on average monthly LME copper prices in the third quarter of
1997.
 
                                       36
<PAGE>   39
 
     Prices:  Sales prices for the Company's metals are established principally
by reference to prices quoted on the London Metal Exchange ("LME"), the New York
Commodity Exchange ("COMEX") or published in "Metals Week" for dealer oxide
prices for molybdenum products.
 
<TABLE>
<CAPTION>
                                                                        SIX MONTHS ENDED
                                                                            JUNE 30,
                                                                       -------------------
                                                                        1997        1996
                                                                       -------     -------
    <S>                                                                <C>         <C>
    PRICE/VOLUME DATA
 
    Average Metal Prices
      Copper (per pound-LME).........................................  $  1.12     $  1.14
      Molybdenum (per pound-Metals Week Dealer Oxide)................  $  4.38     $  3.56
      Silver (per ounce-COMEX).......................................  $  4.87     $  5.42
 
    Sales Volume (in thousands)
      Copper (pounds)................................................  356,000     330,800
      Molybdenum (pounds)(1).........................................    4,488       3,804
      Silver (ounces)................................................    1,495       1,545
</TABLE>
 
- ---------------
(1) The Company's molybdenum production is sold in concentrate form. The volume
    represents pounds of molybdenum contained in concentrate.
 
     Metal Hedging Activities.  Depending on the market fundamentals of a metal
and other conditions, the Company may purchase put options to reduce or
eliminate the risk of metal price declines on a portion of its anticipated
future production. Put options purchased by the Company establish a minimum
sales price for the production covered by such put options and permit the
Company to participate in price increases above the option price. Depending upon
market conditions the Company may sell put options it holds or exercise the
options at maturity. Gains or losses, net of unamortized acquisition costs are
recorded as current liabilities or current assets and are subsequently
recognized in the period in which the underlying hedged production is sold.
 
     Earnings for the six months included a pre-tax gain of $5.6 million in 1997
and a pre-tax loss of $0.3 million in 1996 from the Company's price protection
program. There were no pre-tax gains or losses from price protection in the
second quarter of 1997 compared with a pre-tax gain of $0.5 million in the
second quarter of 1996.
 
                 COPPER PRICE PROTECTION HELD AT JUNE 30, 1997
                     (IN MILLIONS, EXCEPT PER LB. AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                          PERCENT OF
                                                         STRIKE PRICE     UNAMORTIZED     ESTIMATED
                  POUNDS                   PERIOD         PER POUND          COST         PRODUCTION
    ----------------------------------  -------------    ------------     -----------     ----------
    <S>                                 <C>              <C>              <C>             <C>
    94.1..............................   10/97-12/97        $ 0.95           $ 1.4            54%
    44.0..............................    1/98-3/98         $ 0.95             0.6            28%
                                                                             -----
                                                                             $ 2.0
</TABLE>
 
     Operating Costs and Expenses.  Operating costs and expenses were $152.2
million in the second quarter of 1997 compared with $109.1 million for the same
period in 1996. For the six month period ended June 30, 1997 operating costs
were $291.7 million as compared with $233.4 million in the comparable 1996
period.
 
     Cost of sales for the three month and six month period ended June 30, 1997
was $119.8 million and $228.3 million, respectively, this compares to $82.2
million and $176.9 million in the comparable 1996 periods. The increase in the
second quarter of 1997 is primarily attributable to greater sales of copper
produced from purchased concentrates, higher power costs and increased mine
stripping at the Toquepala mine. In the second quarter of 1997 the Company sold
its power plant to an independent power company in order to avoid substantial
capital improvements to meet the power needs of expanded operations, and as a
consequence power costs have increased. These factors which increased second
quarter 1997 cost of sales also affected the six month period ended June 30,
1997.
 
                                       37
<PAGE>   40
 
     Depreciation expense for the three and six month periods ended June 30,
1997 was $11.6 million and $23.1 million, respectively, compared with $10.3
million and $20.7 million in the comparable periods in 1996. The higher 1997
depreciation reflects additions to property.
 
     Nonoperating Items.  Interest income for the three month and six month
periods ended June 30, 1997 was $4.8 million and $7.7 million, respectively,
compared to $4.9 million and $11.1 million in the comparable 1996 periods. The
decrease in 1997 reflects lower interest rates on invested funds, offset in part
in the second quarter of 1997 by $1.1 million interest income received on a
federal income tax refund. The increase of $1.6 million in interest expense in
the second quarter of 1997 reflects financing fees primarily on new borrowings.
 
     Taxes on Income.  Taxes on income for the three and six month periods ended
June 30, 1997 were $15.8 million and $35.6 million, respectively, as compared
with $21.8 million and $48.1 million for the respective periods in 1996. The
decrease was principally due to a reduction in the Company's effective tax rate
as a result of the reinvestment allowance in Peru.
 
     Minority Interest of Labor Shares:  The income statement provision for
minority interest of labor shares during the second quarter represents an
accrual of approximately 2.5% in 1997 and 3.3% in 1996, of the operating
Branch's after-tax earnings, as determined under Peruvian GAAP. The labor share
percentage participation in earnings decreased due to the purchase of labor
shares by the Company.
 
     Cash Flows -- Operating Activities:  Net cash provided from operating
activities for the three month and six month period ended June 30, 1997 was
$84.0 million and $144.9 million, respectively as compared with $68.0 million
and $81.3 million in the comparable 1996 periods. The increase in the second
quarter was primarily a result of higher net earnings. The increase in the six
month period was primarily a result of lower payments for prior year's Peruvian
income taxes and workers' participation and higher net earnings, partially
offset by higher accounts receivable in 1997.
 
     Cash Flows -- Investing Activities:  Investing activities used cash of
$199.2 million for the second quarter of 1997 compared with $37.4 million for
the second quarter of 1996. The 1997 period included purchases of
held-to-maturity investments of $208.8 million consisting of bank time deposits
with maturities ranging from three months to one year and proceeds from the sale
of property of $41.9 million. In the second quarter of 1997, capital
expenditures were $32.3 million compared with $37.4 million in the respective
period of 1996.
 
     In the six month period ended June 30, 1997 and 1996 capital expenditures
were $61.4 million and $51.9 million, respectively. Proceeds from sale of
held-to-maturity investments in the six month period ended June 30, 1997 and
1996 were $1.0 million and $42.5 million, respectively.
 
     Cash Flows -- Financing Activities:  Financing activities in the second
quarter of 1997 included the placement of $200 million of debt. Dividends paid
in the second quarter of 1997 were $28.1 million as compared with $24.1 million
in the comparable 1996 period. For the six months ended June 30, 1997 and 1996,
dividends paid were $52.1 million and $76.2 million, respectively.
 
     Liquidity and Capital Resources:  At June 30, 1997, the Company's debt as a
percentage of total capitalization (total debt, minority interests and
stockholders' equity) was 21.1%, compared with 9.3% at December 31, 1996. Debt
at June 30, 1997 was $294.7 million, compared with $106.6 million at the end of
1996.
 
     In April 1997, the Company entered into a $600 million seven-year loan
facility with a group of international financial institutions. The facility
consists of a $400 million term loan and a $200 million revolving credit line.
The term loan bears an interest rate of LIBOR plus 1.75%.
 
   
     In May, the Company privately placed $150 million of Secured Export Notes
in the United States and offshore. These notes which have an average maturity of
seven years and a final maturity in 2007 were priced at par with a coupon rate
of 7.9%. In addition, in June the Company sold $50 million of bonds, due June
2004 to investors in Peru. The bonds have a fixed interest rate of 8.25%. Under
reasonable assumptions, these funds and the loan facility of $600 million will
provide the Company with sufficient resources for its $1 billion expansion
program.
    
 
                                       38
<PAGE>   41
 
     In the second quarter of 1997, the Company paid a dividend to shareholders
of $28.1 million or $0.35 per share. On July 30, 1997, the Company declared a
quarterly dividend on the common stock of $0.37 per share payable September 2,
1997 to stockholders of record at the close of business on August 15, 1997.
 
     Dividends by the Company are limited by covenants under the Company's
financing agreements. Certain of these dividend restrictions directly apply to
SP Limited as the issuer of the debt, however, they also apply to SPCC in
consolidation or as the guarantor. The most restrictive of these covenants
limits the payment of dividends by SPCC to 50% of consolidated net income.
 
     Expansion and Modernization Project:  In September 1996, the Company
announced a two stage project which includes an expansion of the Cuajone mine
and an expansion and modernization of its copper smelter at Ilo. The total
capital cost for this project is estimated at $1.0 billion, budgeted to be spent
over the next six years.
 
     The Cuajone mine expansion is expected to increase the Company's annual
copper production by 130 million pounds and require an estimated capital
investment of approximately $245 million. Construction contracts for the
expansion have been awarded and site construction commenced in July. Completion
of this stage of its expansion program is expected in 1999.
 
     Engineering for the second stage of the program, the expansion and
modernization of the Ilo smelter began in 1997, following completion of
preliminary engineering SPCC plans to modernize and increase the capacity of its
existing copper smelter at Ilo. The expected cost of the second stage, based on
the Company's preliminary engineering studies, is approximately $787 million and
is expected to be completed in 2003.
 
     A future opportunity for a third stage of the expansion and modernization
plan, consisting of a second expansion at Cuajone and further expansion of the
Ilo smelter capacity will be evaluated at a later date and will depend on the
availability of financing and other conditions at the time. A decision to
proceed on this stage of the project is not expected before 2000. The Company
anticipates that the projects will be funded from a combination of existing
cash, internally generated funds and external financing.
 
     Environmental Matters.  The Company has made a significant number of
environmental capital expenditures, including, a sulfuric acid plant at the Ilo
smelter for partial recapture of sulfur dioxide, completed in 1995 at a cost of
$103.0 million; a sewage treatment plant at Ilo, completed in 1994 at a cost of
$2.0 million; and a tailings storage facility at Quebrada Honda, which became
operational in 1996 and will be completed in 1997 at a cost of approximately $60
million. The Company has also incurred capital costs of $3.0 million for
environmental projects as a result of the commitment made in connection with the
Ilo refinery acquisition. In addition, in April 1996 the Company began a $35
million expansion of the Ilo sulfuric acid plant. The expansion will increase
the capture of sulfur dioxide emissions from the smelter from 18% to 30% and
will also increase sulfuric acid production at the smelter to 330,000 tons per
year in 1998, the expected year of expanded plant operation. Capital
expenditures in connection with these and other environmental projects were
approximately $29.8 million in 1996.
 
     The Company's exploration, mining, milling, smelting and refining
activities are subject to Peruvian laws and regulations, including environmental
laws and regulations, which change from time to time. The Company's recently
approved environmental compliance and management plan, PAMA, sets forth the
investment to be made by the Company to comply with Peruvian environmental
regulations applicable to its operations. To implement the PAMA, the Company is
required to make a minimum annual investment of 1% of net annual sales until
compliance is met. The PAMA will require the Company to make significant
additional capital expenditures to achieve compliance with the maximum
permissible levels for its emission and waste discharges ("MPLs") within a
period of five years, except for environmental controls applicable to its
smelter operation which must be put in place within ten years. The PAMA
contemplates a number of environmental projects, the largest and most capital
intensive of which is the planned modernization of the Ilo smelter. Management
believes that under current Peruvian law and regulations, compliance with the
PAMA will satisfy the MPL requirements pertaining to the Company's operations
during the applicable five-or ten-year implementation period. The Company
remains, however, subject to other environmental requirements applicable to its
operations.
 
     Impact of New Accounting Standards.  In February 1997, the Financial
Accounting Standards Board issued Statement of Financial Accounting Standards
No. 128, "Earnings Per Share" (the "Statement"). The Statement
 
                                       39
<PAGE>   42
 
specifies the computation, presentation and disclosure requirements for earnings
per share ("EPS"). It will require the Company to present both basic and diluted
EPS amounts from income for continuing operations and net income on the face of
the income statement. The Company does not expect the impact of this statement
to have a material effect on its calculation of EPS. The statement will be
effective for financial statements issued for periods ending after December 15,
1997, including interim periods.
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 "Reporting Comprehensive Income". The
Company is currently assessing the impact of this statement, which is effective
for fiscal years beginning after December 15, 1997.
 
RESULTS OF OPERATIONS FOR THE YEARS ENDED DECEMBER 31, 1996, 1995 AND 1994
 
     Earnings.  The Company reported net earnings for the year 1996 of $180.5
million or $2.25 per share, compared with net earnings of $217.8 million, or
$3.31 per share, in 1995 and net earnings of $91.2 million, or $1.39 per share
in 1994. Earnings are significantly affected by changes in copper prices. Lower
copper prices decreased 1996 net earnings by an estimated $109 million compared
with 1995. This decline in earnings due to lower copper prices are somewhat
offset by increased production and lower production costs. Sales of copper
produced from the Company's mines, including the new SX/EW facility increased
significantly in 1996 compared with 1995.
 
     The improvement in the 1995 earnings over 1994 was primarily due to higher
copper and molybdenum prices and reduced operating costs, in part, as a result
of the acquisition of the Ilo refinery in May 1994.
 
     Net earnings in 1996 reflect a reduction in the minority interest of labor
shares in the Branch. An exchange of labor shares for common shares was
completed in the fourth quarter of 1995 and reduced the interest of labor shares
from 17.3% to 3.3.%. At December 31, 1996, the interest of labor shares was
2.8%.
 
     As a result of ongoing drilling programs at the Company's mines, proven and
probable ore reserves increased substantially in 1996. At December 31, 1996,
proven and probable ore reserves at Toquepala were 331.6 million tons with an
average grade of 0.82% copper, and at Cuajone were 1,400.3 million tons with an
average grade of 0.65% copper. In addition, leachable reserves at the two mines
were 665 million tons with an average grade of 0.22% copper.
 
     Net Sales.  Net sales in 1996 were $753.0 million compared with $928.8
million in 1995 and $701.7 million in 1994. While copper sales volume was 47.7
million pounds higher in 1996 than in 1995, net sales decreased by $175.8
million, principally due to lower copper prices. Copper sales volume was 6.5
million pounds lower in 1995 than in 1994 primarily due to slightly lower
smelter production in 1995 and a reduction in inventory levels in 1994. The
resulting decrease in copper sales volume was more than offset by higher copper
and molybdenum prices and higher molybdenum volume in 1995.
 
     Prices.  Sales prices for the Company's metals are established principally
by reference to prices quoted on the LME, COMEX or published in "Metals Week"
for dealer oxide prices for molybdenum products. See "Overview of Copper
Market".
 
                                       40
<PAGE>   43
 
PRICE/VOLUME DATA
 
<TABLE>
<CAPTION>
                                                           1996         1995         1994
                                                         --------     --------     --------
    <S>                                                  <C>          <C>          <C>
    AVERAGE METAL PRICES
      Copper (per pound -- LME)........................  $   1.04     $   1.33     $   1.05
      Molybdenum (per pound)...........................      3.61         7.42         4.50
      Silver (per ounce -- COMEX)......................      5.18         5.18         5.28
    SALES VOLUME (IN THOUSANDS)
      Copper (pounds)..................................   694,290      646,604      653,122
      Molybdenum (pounds)(1)...........................     8,813        8,402        5,698
      Silver (ounces)..................................     3,110        3,761        3,184
</TABLE>
 
- ---------------
(1) The Company's molybdenum production is sold in concentrate form. Volume
    represents pounds of molybdenum contained in concentrate.
 
     Financial Instruments.  Depending on the market fundamentals of a metal and
other conditions, the Company may purchase put options to reduce or eliminate
the risk of metal price declines below the options strike price on a portion of
its anticipated future production. Put options purchased by the Company
establish a minimum sales price for the production covered by such put options
and permit the Company to participate in price increases above the option price.
The cost of options is amortized on a straight-line basis during the period in
which the options are exercisable. Depending upon market conditions the Company
may either sell options it holds or exercise the options at maturity. Gains or
losses, net of unamortized acquisition costs, are recognized in the period in
which the underlying production is sold and are reported as a component of the
underlying transaction.
 
     For the full year 1996, the Company realized pre-tax gains of $16.7 million
as a result of its copper price protection program, of which $11.1 million was
recognized in 1996. The remaining $5.6 million will be recognized in the first
quarter of 1997 when the underlying production is sold. Copper put options with
a cost of $1.2 million expired during the first six months of 1996. The
recognized pre-tax gains (losses) of the Company's metal hedging activities, net
of transaction costs were $9.9 million $(2.1) million and $(1.8) million in
1996, 1995 and 1994, respectively.
 
     Operating Costs and Expenses.  Operating costs and expenses were $504.3
million in 1996 compared with $562.2 million in 1995 and $559.7 million in 1994.
Cost of sales decreased to $389.6 million in 1996 from $439.4 million in 1995.
While the volume of all copper sold increased by 47.7 million pounds in 1996 as
compared with 1995, cost of sales decreased by $49.8 million. The cost of sales
decrease was principally attributable to a reduction in sales of copper produced
from purchased concentrates of 61.3 million pounds, and an increase of 109.0
million pounds in sales of copper produced from Company mines, of which 83.1
million pounds represented increased production from the new low-cost SX/EW
facility. The unit cost of purchased concentrates in 1995 was considerably
higher, as a result of market prices. Cost of sales decreased from $454.0
million in 1994 to $439.4 million in 1995, principally reflecting the savings
derived from operating the Ilo refinery, purchased in May 1994, partially offset
by higher sales volumes of by-products and the higher cost of purchased
concentrates.
 
     Administrative and other expenses were $50.0 million in 1996 compared with
$52.7 million in 1995 and $48.1 million in 1994.
 
     Depreciation, amortization and depletion expense was $41.6 million in 1996
compared with $36.0 million in 1995 and $39.7 million in 1994. The increase in
1996 includes the depreciation expense on major additions to property in late
1995. Increased ore reserves had the effect of reducing depreciation,
amortization and depletion expense by $6.1 million in 1995. The increase in ore
reserves in 1996 had no material impact on 1996 depreciation expense.
 
     The provision for workers participation was $18.0 million in 1996 compared
with $32.2 million in 1995 and $13.9 million in 1994. The decrease in 1996 was
due to lower pre-tax profits of the Branch, and the 1995 increase
 
                                       41
<PAGE>   44
 
reflects higher profits. Peruvian law provides that workers in mining companies
participate in 8% of pre-tax profits. Such participations are paid in the
following year.
 
     Non-Operating Items.  Interest income was $18.3 million in 1996 compared
with $14.8 million in 1995 and $6.5 million for 1994. The increases in 1996 and
1995 reflected higher interest rates and higher invested cash balances. Interest
income is expected to decrease as available cash is used to fund the Company's
expansion program. Other income was $11.4 million in 1996 compared with $12.8
million in 1995 and $23.2 million in 1994. 1995 and 1994 include pre-tax gains
on sales of investments of $1.3 million and $18.4 million, respectively.
Exchange gains included in other income are $6.7 million, $6.0 million and $1.6
million for the years 1996, 1995 and 1994, respectively. Interest expense was
$12.5 million in 1996 compared with $13.9 million in 1995 and $7.8 million for
1994. Interest expense in 1995 included the write-off of $2.0 million of
previously capitalized loan fees related to the pre-payment of $77 million of
the Company's long-term debt.
 
     Taxes on Income.  Taxes on income were $80.2 million, $119.1 million and
$54.1 million for 1996, 1995 and 1994, respectively, and include $74.9 million,
$114.5 million and $46.8 million for Peruvian income taxes and $5.3 million,
$4.6 million and $7.3 million, respectively, for U.S. federal and state taxes.
U.S. income taxes are primarily attributable to investment income as well as
limitations on use of foreign tax credits in determining the alternative minimum
tax.
 
     The Company obtains income tax credits in Peru for value-added taxes
("VAT") paid in connection with the purchase of capital equipment and other
goods and services employed in its operations and records these payments as a
prepaid expense. Under current Peruvian law, the Company is entitled to credit
the amount of such VAT against its Peruvian income tax liability or receive a
refund.
 
     Minority Interest of Labor Shares.  The minority interest of labor shares
of the Branch was $5.2 million in 1996 compared with $43.6 million in 1995 and
$18.6 million in 1994. The income statement provision for minority interest of
labor shares represents an accrual of 3.1%, 17.3% and 17.5% for 1996, 1995 and
1994, respectively, of the Branch's after-tax earnings as determined under
Peruvian GAAP.
 
     The reduction in the minority interest of labor shares principally reflects
the effect of the exchange of SPCC common stock for labor shares completed in
the fourth quarter of 1995.
 
     Cash Flows -- Operating Activities.  Net cash flow from operating
activities was $158.8 million in 1996, compared with $330.4 million for 1995 and
$134.9 million in 1994. The decrease in operating cash flow in 1996 was a result
of higher Peruvian income taxes paid in 1996, principally relating to the final
tax payment for 1995 and lower cash earnings. The increase in operating cash
flow in 1995 reflects higher cash earnings and changes in working capital.
 
     Cash Flows -- Investing Activities.  Net cash used for investing activities
was $79.3 million in 1996 as compared with $119.5 million in 1995 and $138.8
million in 1994. Capital expenditures in 1996 were $120.8 million as compared
with $183.0 million in 1995 and $181.9 million in 1994. In 1996, $19.4 million
was spent to complete the Quebrada Honda tailings project, through the starter
dam phase. In addition, $27.2 million was spent on new large capacity shovels
and haul trucks for the mines. In 1995, the Company spent $36 million for
completion of the sulfuric acid plant at the Ilo smelter and $77 million for
completion of the Toquepala SX/EW plant. In 1995, $61.1 million was transferred
from a restricted account and used to support the capital spending.
 
     In May 1994, the Company purchased the Ilo refinery from a Peruvian
government-owned entity for $65 million in cash and a commitment to make an
additional $20.2 million of capital improvements over three years. The Company
had substantially completed this commitment at December 31, 1996. The
acquisition of the refinery has allowed the Company to integrate its operation
from the mining and smelting of copper to the production of refined copper and
to reduce its cash costs of operations.
 
     In 1994, the Company realized proceeds of $50.3 million from the sale of
investments. Investments in marketable securities include a net redemption in
1996 and 1995 of $41.5 million and $0.5 million, respectively, as compared with
a net investment in marketable securities of $7.2 million in 1994.
 
     Cash Flows -- Financing Activities.  Financing activities used cash of
$127.6 million in 1996 as compared with $86.1 million in 1995 and cash provided
of $64.7 million in 1994. The 1996 amount includes purchase of
 
                                       42
<PAGE>   45
 
labor shares and treasury stock of $8.3 million, net borrowings of $2.6 million
as compared with net repayment of borrowings of $13.3 million in 1995 and net
proceeds from borrowing of $90.3 million in 1994. The 1995 amount includes
proceeds from a subscription of labor shares of $10.9 million. Distributions to
the labor share minority interest were $4.1 million in 1996. Dividends paid in
1996 were $117.9 million as compared with $83.7 million in 1995 and $21.4
million in 1994. On February 4, 1997 a dividend of $0.30 a share, totaling $24.1
million was declared, payable March 3, 1997.
 
     The information set forth below under "-- Liquidity and Capital Resources";
"Exchange Offer for Labor Shares"; "Dividends and Capital Stock"; "Environmental
Matters"; "Accounting Matters" and "Subsequent Events" has been derived from
SPCC's Annual Report on Form 10-K for the fiscal year ended December 31, 1996.
For updates with respect to certain of the information in these sections, see
the corresponding sections under "-- Results of Operations for the Six Months
Ended June 30, 1997 and June 30, 1996".
 
LIQUIDITY AND CAPITAL RESOURCES
 
     1991 Agreement.  In December 1991, the Company and the Government of Peru
signed an agreement (the "1991 Agreement") resolving all open issues concerning
the conclusion of the investment recovery contract which governed the
development and operation of the Cuajone mine. Under the 1991 Agreement, the
Company agreed to undertake an investment program over the five years,
1992-1996, and the Peruvian Government agreed not to discriminate against the
Company in comparison with treatment given to other mining companies. As part of
this agreement, in 1991 the Company transferred $55.0 million from its accounts
in New York to an interest-bearing account with the Central Reserve Bank of
Peru, to be withdrawn by the Company at its discretion solely for application to
the investment program. In March 1995, these funds, aggregating $61.1 million,
including accumulated interest, were transferred to the Branch as a capital
contribution and used for the capital spending program. In conjunction with the
transfer, labor shareholders contributed $10.9 million to the capital of the
Branch.
 
     At December 31, 1996, the Company had expended $443.6 million under the
agreed five-year program and has met its obligations under the 1991 Agreement.
 
     Financing.  In January 1996, the Company borrowed $47 million, the
remaining commitment available under a $50 million loan from Mitsui at a rate of
LIBOR plus 2.87%. In addition, in November 1996, the Company prepaid $12.9
million, the remaining loan balance from two Peruvian commercial banks. At
December 31, 1996 the Company had outstanding borrowings under its long-term
loan agreements of $106.6 million. There were no amounts available under these
facilities at December 31, 1996. The loans are payable in semi-annual
installments through 2001 and bear interest based on LIBOR, except for a 6.43%
fixed-rate loan from the U.S. Eximbank. The December 31, 1996 balance on this
loan was $26.3 million.
 
     The financing agreements contain covenants which limit the payment of
dividends to stockholders. Under the most restrictive loan, the Company may not
pay a dividend if the aggregate amount of all dividend payments with respect to
any fiscal quarter is greater than 50% of Net Income (as defined therein) of the
Company for such fiscal quarter. However, this agreement permits dividends with
respect to the final quarter of each fiscal year to the extent that total
dividends for such fiscal year do not exceed 50% of the first $50 million of
earnings plus 100% of earnings in excess of $50 million for such fiscal year.
These dividend restrictions directly apply to SP Limited as the issuer of the
debt. However, on consolidation they also apply to SPCC. Net assets of SP
Limited unavailable for the payment of dividends to SPCC totaled $821 million at
December 31, 1996.
 
     The financing agreements are collateralized by pledges of receivables from
34,200 tons of copper per year and liens on certain product inventory, fixed
assets and mining concessions. In addition, certain of the agreements require
the Company to maintain a minimum stockholders' equity of $750 million,
specified ratios of debt to equity, current assets to current liabilities and an
interest coverage test. Any reduction of Asarco's voting interest in the Company
to less than a majority would constitute an event of default under one of the
financing agreements. The Company is in compliance with the various loan
covenants at December 31, 1996. Included in other assets are $11.3 million held
in escrow accounts as required by the Company's loan agreements. The funds will
be released from escrow as scheduled loan repayments are made.
 
                                       43
<PAGE>   46
 
     At December 31, 1996, the Company's debt as a percentage of total
capitalization was 9.3% as compared with 8.8% at December 31, 1995. Debt at
December 31, 1996 was $106.6 million, compared with $93.9 million at the end of
1995.
 
     Cash Position and Requirements.  At December 31, 1996, the Company's cash
and cash equivalents and marketable securities amount to $174.2 million as
compared with $262.1 million at December 31, 1995.
 
     Expansion and Modernization Project.  In September 1996, the Company
announced a project including an expansion of the Cuajone mine and an expansion
and modernization of its copper smelter at Ilo. Commencement of the project will
begin once financing has been arranged. The Company is in the process of
arranging financing for the program. In January 1997, the Company received
preliminary commitments from a group of six financial institutions for a loan
facility of $600 million with a final maturity of 7 years. The commitment and
terms of the financing are subject to final documentation which is expected to
be completed in early 1997. Upon closing of this financing, the Company expects
to commence the modernization and expansion project. Additional financing for
the project also is being sought from other sources. The Cuajone mine expansion
which will expand the annual copper production by 130 million pounds represents
the first stage of the project. Engineering for the second stage of the program,
the modernization of the Ilo smelter has begun. Following completion of the
preliminary engineering and securing of the financing, SPCC plans to modernize
its existing copper smelter at Ilo to meet current international environmental
guidelines and to increase capacity. Total capital cost for the first two stages
of the project is estimated at $1.0 billion, budgeted to be spent over the next
six years.
 
     Stage I, the expansion of the Cuajone mine, is expected to require a
capital investment of approximately $245 million and is expected to be completed
in early 1999. Stage II, the expansion and modernization of the Ilo smelter, is
expected to cost approximately $787 million, based on the Company's preliminary
engineering studies, and is expected to be completed in 2003.
 
     A future opportunity for a third stage of the expansion and modernization
plan, consisting of a second expansion at Cuajone and further expansion of the
Ilo smelter capacity will be evaluated at a later date and will depend on the
availability of financing and other conditions at the time. A decision to
proceed on this stage of the project is not expected before 2000. The Company
expects that the projects will be funded from a combination of existing cash,
internally generated funds and external financing.
 
EXCHANGE OFFER FOR LABOR SHARES
 
     In November 1995, the Company offered to exchange newly issued common stock
for any and all of the outstanding labor shares of the Peruvian Branch.
 
     The exchange offer expired on December 29, 1995, with 80.8% of outstanding
labor shares exchanged for 11,480,093 shares of common stock. The common stock
has been listed on the New York Stock Exchange and the Lima Stock Exchange since
January 5, 1996.
 
     In conjunction with the exchange of labor shares, the founding common
stockholders of the Company exchanged their shares for Class A common shares.
 
     The exchange of common stock for labor shares has been accounted for as a
purchase of a minority interest. The value of the common stock issued in the
exchange (based on the average per share trading value for the three business
days ended January 9, 1996) plus issuance costs exceeded the carrying value of
the minority interests acquired by $82.0 million, net of tax. The increase in
value was assigned to metal inventory and to proven and probable sulfide and
leachable ore reserves and mineralized material.
 
DIVIDENDS AND CAPITAL STOCK
 
     The Company paid dividends to stockholders of $117.9 million, or $1.47 per
share, in 1996, $83.7 million or $1.27 per share, in 1995 and $21.4 million, or
$0.33 per share in 1994.
 
     At the end of 1996 and 1995, the authorized and outstanding capital stock
of the Company consisted of 66,550,833 and 68,750,833 shares of Class A common
stock, par value $0.01 per share, respectively; and 33,449,167 and 31,249,167
authorized shares of common stock, par value $0.01 per share, respectively, of
which
 
                                       44
<PAGE>   47
 
13,633,674 shares were outstanding at December 31, 1996 and 11,479,667 shares
were outstanding at December 31, 1995. At the end of 1994, 76,251,193 shares of
old common stock were issued of which 65,717,493 shares were outstanding.
 
ENVIRONMENTAL MATTERS
 
     As part of the 1991 Agreement, the Company made a significant number of
environmental capital expenditures, including a sulfuric acid plant at the Ilo
smelter for partial recapture of sulfur dioxide, completed in 1995 at a cost of
$103.0 million; a sewage treatment plant at Ilo, completed in 1994 at a cost of
$2.0 million; and a tailings storage facility at Quebrada Honda, which became
operational in 1996 at a cost of $40.8 million. The Company has also incurred
capital costs of $3.0 million for environmental projects as a result of the
commitment made in connection with the Ilo refinery acquisition. In addition, in
April 1996 the Company began a $35.0 million expansion of the Ilo sulfuric acid
plant. The expansion will increase the capture of sulfur dioxide emissions from
the smelter from 18% to 30% and will also increase sulfuric acid production at
the smelter to 330,000 tons per year in 1998, the expected year of expanded
plant operation. Capital expenditures in connection with these and other
environmental projects were approximately $29.8 million in 1996.
 
     The Company's exploration, mining, milling, smelting and refining
activities are subject to Peruvian laws and regulations, including environmental
laws and regulations, which change from time to time. The Company recently
approved an environmental compliance and management plan, PAMA, which sets forth
the investments to be made by the Company to comply with current Peruvian
environmental regulations applicable to its operations. To implement the PAMA,
the Company is required to make a minimum annual investment of 1% of net annual
sales until compliance is met. The PAMA will require the Company to make
significant additional capital expenditures to achieve compliance with the
maximum permissible levels for its MPLs within a period of five years, except
for environmental controls applicable to its smelter operation which must be put
in place within ten years. The PAMA contemplates a number of environmental
projects, the largest and most capital intensive of which is the planned
modernization of the Ilo smelter. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations -- Expansion and Modernization
Project". Management believes that under current Peruvian law and regulations,
compliance with the PAMA will satisfy the MPL requirements pertaining to the
Company's operations during the applicable five or ten year implementation
period. The Company remains, however, subject to other environmental
requirements applicable to its operations.
 
ACCOUNTING MATTERS
 
     The American Institute of Certified Public Accountants issued Statement of
Position 96-1, "Environmental Remediation Liabilities" ("SOP 96-1") in October
1996. SOP 96-1 provides authoritative guidance on specific accounting issues in
connection with recognizing, measuring and disclosing environmental remediation
liabilities. Application of SOP 96-1 in the fourth quarter of 1996 had no effect
on the Company's financial statements.
 
SUBSEQUENT EVENT
 
     On February 21, 1997, the Company entered into agreements with a wholly
owned subsidiary of Tractebel, for the sale of a new turbine at its Ilo power
plant and a 20-year power purchase agreement for its copper operations in Peru.
In April 1997, the Company completed the sale of its existing power plant assets
to Tractebel.
 
                                       45
<PAGE>   48
 
                               THE EXCHANGE OFFER
 
TERMS OF THE EXCHANGE OFFER; PERIOD FOR TENDERING OLD NOTES
 
     Upon the terms and subject to the conditions set forth in this Prospectus
and in the accompanying Letter of Transmittal (which together constitute the
Exchange Offer), the Issuer will accept for exchange Old Notes which are
properly tendered on or prior to the Expiration Date and not withdrawn as
permitted below. As used herein, the term "Expiration Date" means 5:00 p.m., New
York City time, on                , 1997; provided, however, that if the Issuer,
in its sole discretion, has extended the period of time for which the Exchange
Offer is open, the term "Expiration Date" means the latest time and date to
which the Exchange Offer is extended.
 
     As of the date of this Prospectus, $150,000,000 aggregate principal amount
of the Old Notes were outstanding. This Prospectus, together with the Letter of
Transmittal, is first being sent on or about the date set forth on the cover
page to all holders of Old Notes at the addresses set forth in the security
register with respect to Old Notes maintained by the Trustee. The Issuer's
obligations to accept Old Notes for exchange pursuant to the Exchange Offer is
subject to certain conditions as set forth under "Certain Conditions to the
Exchange Offer" below.
 
     The Issuer expressly reserves the right, at any time or from time to time,
to extend the period of time during which the Exchange Offer is open, and
thereby delay acceptance of any Old Notes, by giving oral or written notice of
such extension to the Exchange Agent (as defined below) and notice of such
extension to the holders as described below. During any such extension, all Old
Notes previously tendered will remain subject to the Exchange Offer and may be
accepted for exchange by the Issuer. Any Old Notes not accepted for exchange for
any reason will be returned without expense to the tendering holder thereof as
promptly as practicable after the expiration or termination of the Exchange
Offer.
 
     The Issuer expressly reserves the right to amend or terminate the Exchange
Offer, and not to accept for exchange any Old Notes not theretofore accepted for
exchange, upon the occurrence of any of the conditions of the Exchange offer
specified below under "Certain Conditions to the Exchange Offer". The Issuer
will give oral or written notice of any extension, amendment, non-acceptance or
termination to the holders of the Old Notes as promptly as practicable, such
notice in the case of any extension to be issued by means of a press release or
other public announcement no later than 9:00 a.m., New York City time, on the
next business day after the previously scheduled Expiration Date.
 
     Holders of Old Notes do not have any appraisal or dissenters' rights under
the General Corporation Law of the State of Delaware or the Indenture in
connection with the Exchange Offer. The Issuer intends to conduct the Exchange
Offer in accordance with the applicable requirements of the Exchange Act and the
rules and regulations of the Commission thereunder.
 
PROCEDURES FOR TENDERING OLD NOTES
 
     The tender to the Issuer of Old Notes by a holder thereof as set forth
below and the acceptance thereof by the Issuer will constitute a binding
agreement between the tendering holder and the Issuer upon the terms and subject
to the conditions set forth in this Prospectus and in the accompanying Letter of
Transmittal. Except as set forth below, a holder who wishes to tender Old Notes
for exchange pursuant to the Exchange Offer must transmit a properly completed
and duly executed Letter of Transmittal, including all other documents required
by such Letter of Transmittal, to Citibank, N.A. (the "Exchange Agent") at the
address set forth below under "Exchange Agent" on or prior to the Expiration
Date. In addition, (i) certificates for such Old Notes must be received by the
Exchange Agent along with the Letter of Transmittal, (ii) a timely confirmation
of a book-entry transfer (a "Book-Entry Confirmation") of such Old Notes, if
such procedure is available, into the Exchange Agent's account at The Depository
Trust Company (the "Book-Entry Transfer Facility") pursuant to the procedure for
book-entry transfer described below, must be received by the Exchange Agent
prior to the Expiration Date or (iii) the holder must comply with the guaranteed
delivery procedures described below. THE METHOD OF DELIVERY OF OLD NOTES,
LETTERS OF TRANSMITTAL AND ALL OTHER REQUIRED DOCUMENTS IS AT THE ELECTION AND
RISK OF THE HOLDERS. IF SUCH DELIVERY IS BY MAIL, IT IS RECOMMENDED THAT
REGISTERED MAIL, PROPERLY INSURED, WITH RETURN RECEIPT RE-
 
                                       46
<PAGE>   49
 
QUESTED, BE USED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ASSURE
TIMELY DELIVERY. NO LETTERS OF TRANSMITTAL OR OLD NOTES SHOULD BE SENT TO THE
COMPANY.
 
     Signatures on a Letter of Transmittal or a notice of withdrawal, as the
case may be, must be guaranteed unless the Old Notes surrendered for exchange
pursuant thereto are tendered (i) by a registered holder of such Old Notes and
the certificates for New Notes to be issued in exchange therefor are to be
issued (or any untendered amount of Old Notes are to be reissued) to the
registered holder or (ii) for the account of an Eligible Institution (as defined
below). In the event that signatures on a Letter of Transmittal or a notice of
withdrawal, as the case may be, are required to be guaranteed, such guarantees
must be by a firm which is a member of a registered national securities exchange
or a member of the National Association of Securities Dealers, Inc. or by a
commercial bank or trust company having an office or correspondent in the United
States (collectively, "Eligible Institutions"). If Old Notes are registered in
the name of a person other than the person signing the Letter of Transmittal,
the Old Notes surrendered for exchange must be endorsed by, or be accompanied
by, a written instrument or instruments of transfer or exchange, in satisfactory
form as determined by the Issuer in its sole discretion, duly executed by the
registered holder with the signature thereon guaranteed by an Eligible
Institution.
 
     All questions as to the validity, form, eligibility (including time of
receipt) and acceptance of Old Notes tendered for exchange will be determined by
the Issuer in its sole discretion, which determination shall be final and
binding. The Issuer reserves the absolute right to reject any and all tenders of
any particular Old Notes not properly tendered or to not accept any particular
Old Notes which acceptance might, in the judgment of the Issuer or its counsel,
be unlawful. The Issuer also reserves the absolute right in its sole discretion
to waive any defects or irregularities or conditions of the Exchange Offer as to
any particular Old Notes either before or after the Expiration Date (including
the right to waive the ineligibility of any holder who seeks to tender Old Notes
in the Exchange Offer). The interpretation of the terms and conditions of the
Exchange Offer as to any particular Old Notes either before or after the
Expiration Date (including the Letter of Transmittal and the instructions
thereto) by the Issuer shall be final and binding on all parties. Unless waived,
any defects or irregularities in connection with the tenders of Old Notes for
exchange must be cured within such reasonable period of time as the Issuer shall
determine. Neither the Issuer, the Exchange Agent nor any other person shall be
under any duty to give notification of any defect or irregularity with respect
to any tender of Old Notes for exchange, nor shall any of them incur any
liability for failure to give such notification.
 
     Each holder participating in the Exchange Offer shall be required to
represent to the Company that at the time of the consummation of the Exchange
Offer (i) any New Notes received by such holder will be acquired in the ordinary
course of business, (ii) such holder will have no arrangements or understanding
with any person to participate in the distribution of the Old Notes or the New
Notes within the meaning of the Securities Act, (iii) such holder is not an
"affiliate," as defined in Rule 405 of the Securities Act, of the Company or if
it is an affiliate, such holder will comply with the registration and prospectus
delivery requirements of the Securities Act to the extent applicable, (iv) if
such holder is not a broker-dealer, that it is not engaged in, and does not
intend to engage in, the distribution of the New Notes and (v) if such holder is
a broker-dealer, that it will receive New Notes for its own account in exchange
for Old Notes that were acquired as a result of market-making activities or
other trading activities and that it will be required to acknowledge that it
will deliver a prospectus in connection with any resale of such New Notes.
 
ACCEPTANCE OF OLD NOTES FOR EXCHANGE; DELIVERY OF NEW NOTES
 
     Upon satisfaction or waiver of all of the conditions to the Exchange Offer,
the Issuer will accept, promptly after the Expiration Date, all Old Notes
properly tendered and will issue the New Notes promptly after acceptance of the
Old Notes. See "Certain Conditions to the Exchange Offer" below. For purposes of
the Exchange Offer, the Issuer shall be deemed to have accepted properly
tendered Old Notes for exchange when, as and if the Issuer has given oral or
written notice thereof to the Exchange Agent.
 
     In all cases, issuance of New Notes for Old Notes that are accepted for
exchange pursuant to the Exchange Offer will be made only after timely receipt
by the Exchange Agent of certificates for such Old Notes or a timely Book-Entry
Confirmation of such Old Notes into the Exchange Agent's account at the
Book-Entry Transfer
 
                                       47
<PAGE>   50
 
Facility pursuant to the book-entry transfer procedures described below, a
properly completed and duly executed Letter of Transmittal and all other
required documents. If any tendered Old Notes are not accepted for any reason
set forth in the terms and conditions of the Exchange Offer or if certificates
representing Old Notes are submitted for a greater principal amount than the
holder desires to exchange, such unaccepted or non-exchanged Old Notes will be
returned without expense to the tendering holder thereof (or, in the case of Old
Notes tendered by book-entry transfers into the Exchange Agent's account at the
Book-Entry Transfer Facility pursuant to the book-entry transfer procedures
described below, such non-exchanged Old Notes will be credited to an account
maintained with such Book-Entry Transfer Facility) as promptly as practicable
after the expiration or termination of the Exchange Offer.
 
INTEREST ON THE NEW NOTES
 
   
     The New Notes will bear interest from             , payable on the 30th day
of each month (or the 28th day of February), accruing from the Interest Date.
Interest on each New Note will accrue from the later of (i) the last interest
payment date on which interest was paid on the Old Note surrendered in exchange
therefor, or (ii) if the Old Note is surrendered for exchange to occur on a date
after the record date for the next succeeding interest payment date and prior to
such interest payment date, the date of such interest payment date.
    
 
BOOK-ENTRY TRANSFER
 
     The Exchange Agent will make a request to establish an account with respect
to the Old Notes at the Book-Entry Transfer Facility for purposes of the
Exchange Offer promptly after the date of this Prospectus. Any financial
institution that is a participant in the Book-Entry Transfer Facility's systems
may make book-entry delivery of Old Notes by causing the Book-Entry Transfer
Facility to transfer such Old Notes into the Exchange Agent's account in
accordance with the Book-Entry Transfer Facility's Automated Tender Offer
Program ("ATOP") procedures for transfer. However, the exchange for the Old
Notes so tendered will only be made after timely confirmation of such book-entry
transfer of Old Notes into the Exchange Agent's account, and timely receipt by
the Exchange Agent of an Agent's Message (as such term is defined in the next
sentence) and any other documents required by the Letter of Transmittal. The
term "Agent's Message" means a message, transmitted by the Book-Entry Transfer
Facility and received by the Exchange Agent and forming a part of a Book-Entry
Confirmation, which states that the Book-Entry Transfer Facility has received an
express acknowledgment from a participant tendering Old Notes that are the
subject of such Book-Entry Confirmation that such participant has received and
agrees to be bound by the terms of the Letter of Transmittal, and that the
Issuer may enforce such agreement against such participant.
 
GUARANTEED DELIVERY PROCEDURES
 
     If a registered holder of the Old Notes desires to tender such Old Notes
and the Old Notes are not immediately available, or time will not permit such
holder's Old Notes or other required documents to reach the Exchange Agent
before the Expiration Date, or the procedure for book-entry transfer cannot be
completed on a timely basis, a tender may be effected if (i) the tender is made
through an Eligible Institution, (ii) prior to the Expiration Date, the Exchange
Agent receives from such Eligible Institution a properly completed and duly
executed Letter of Transmittal (or a facsimile thereof) and Notice of Guaranteed
Delivery, substantially in the form provided by the Issuer (by telegram, telex,
facsimile transmission, mail or hand delivery), setting forth the name and
address of the holder of Old Notes and the amount of Old Notes tendered, stating
that the tender is being made thereby and guaranteeing that within five New York
Stock Exchange ("NYSE") trading days after the date of execution of the Notice
of Guaranteed Delivery, the certificates of all physically tendered Old Notes,
in proper form for transfer, or a Book-Entry Confirmation, as the case may be,
and any other documents required by the Letter of Transmittal will be deposited
by the Eligible Institution with the Exchange Agent, and (iii) the certificates
for all physically tendered Old Notes, in proper form for transfer, or a
Book-Entry Confirmation, as the case may be, and all other documents required by
the Letter of Transmittal, are received by the Exchange Agent within five NYSE
trading days after the date of execution of the Notice of Guaranteed Delivery.
 
                                       48
<PAGE>   51
 
WITHDRAWAL RIGHTS
 
     Tenders of Old Notes may be withdrawn at any time prior to the Expiration
Date.
 
     For a withdrawal to be effective, a written notice of withdrawal must be
received by the Exchange Agent at one of the addresses set forth below under
"Exchange Agent". Any such notice of withdrawal must specify the name of the
person having tendered the Old Notes to be withdrawn, identify the Old Notes to
be withdrawn (including the principal amount of such Old Notes), and (where
certificates for Old Notes have been transmitted) specify the name in which such
Old Notes are registered, if different from that of the withdrawing holder. If
certificates for Old Notes have been delivered or otherwise identified to the
Exchange Agent, then, prior to the release of such certificates, the withdrawing
holder must also submit the serial numbers of the particular certificates to be
withdrawn and a signed notice of withdrawal with signatures guaranteed by an
Eligible Institution unless such holder is an Eligible Institution. If Old Notes
have been tendered pursuant to the procedure for book-entry transfer described
above, any note of withdrawal must specify the name and number of the account at
the Book-Entry Transfer Facility to be credited with the withdrawn Old Notes and
otherwise comply with the procedures of such facility. All questions as to the
validity, form and eligibility (including time of receipt) of such notices will
be determined by the Issuer, whose determination shall be final and binding on
all parties. Any Old Notes so withdrawn will be deemed not to have been validly
tendered for exchange for purposes of the Exchange Offer. Any Old Notes which
have been tendered for exchange but which are not exchanged for any reason will
be returned to the holder thereof without cost to such holder (or, in the case
of Old Notes tendered by book-entry transfer into the Exchange Agent's account
at the Book-Entry Transfer Facility pursuant to the book-entry transfer
procedures described above, such Old Notes will be credited to an account
maintained with such Book-Entry Transfer Facility for the Old Notes) as soon as
practicable after withdrawal, rejection of tender or termination of the Exchange
Offer. Properly withdrawn Old Notes may be retendered by following one of the
procedures described under "Procedures for Tendering Old Notes" above at any
time on or prior to the Expiration Date.
 
CERTAIN CONDITIONS TO THE EXCHANGE OFFER
 
     Notwithstanding any other provisions of the Exchange Offer, the Issuer
shall not be required to accept for exchange, or to issue New Notes in exchange
for, any Old Notes and may terminate or amend the Exchange Offer, if at any time
before the acceptance of such Old Notes for exchange or the exchange of the New
Notes for such Old Notes, such acceptance or issuance would violate applicable
law or any interpretation of the staff of the Commission.
 
     The foregoing condition is for the sole benefit of the Issuer and may be
asserted by the Issuer regardless of the circumstances giving rise to such
condition or may be waived by the Issuer in whole or in part at any time and
from time to time in its sole discretion. The failure by the Issuer at any time
to exercise the foregoing rights shall not be deemed to be a waiver of any such
right and each such right shall be deemed an ongoing right which may be asserted
at any time and from time to time.
 
     In addition, the Issuer will not accept for exchange any Old Notes
tendered, and no New Notes will be issued in exchange for any such Old Notes, if
at such time any stop order shall be threatened or in effect with respect to the
Registration Statement of which this Prospectus constitutes a part, or the
qualification of the Indenture under the Trust Indenture Act of 1939, as amended
(the "TIA").
 
EXCHANGE AGENT
 
     Citibank, N.A. has been appointed as the Exchange Agent for the Exchange
Offer. All executed Letters of Transmittal should be directed to the Exchange
Agent at one of the addresses set forth below. Questions and
 
                                       49
<PAGE>   52
 
requests for assistance, requests for additional copies of this Prospectus or of
the Letter of Transmittal and requests for Notices of Guaranteed Delivery should
be directed to the Exchange Agent, addressed as follows:
 
                                  Deliver To:
                                 CITIBANK, N.A.
 
<TABLE>
<S>                             <C>                             <C>
          By Hand:                        By Mail:                  By Overnight Carrier:
       Citibank, N.A.                  Citibank, N.A.                  Citibank, N.A.
                                      c/o Citicorp Data               c/o Citicorp Data
   Corporate Trust Window            Distribution, Inc.              Distribution, Inc.
 111 Wall Street, 5th Floor             P.O. Box 7072                  404 Sette Drive
  New York, New York 10043        Paramus, New Jersey 07653       Paramus, New Jersey 07652
</TABLE>
 
              Facsimile for Eligible Institutions: (201) 262-3240
                      To confirm fax only: (800) 422-2077
 
     DELIVERY TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR TRANSMISSION OF
INSTRUCTIONS VIA FACSIMILE OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A
VALID DELIVERY.
 
FEES AND EXPENSES
 
     The principal solicitation is being made by mail; however, additional
solicitation may be made by telegraph, telephone or in person by officers and
regular employees of the Issuer and its affiliates. No additional compensation
will be paid to any such officers and employees who engage in soliciting
tenders. The Issuer will not make any payment to brokers, dealers, or others
soliciting acceptances of the Exchange Offer. The Issuer, however, will pay the
Exchange Agent reasonable and customary fees for its services and will reimburse
it for its reasonable out-of-pocket expenses in connection therewith.
 
     The estimated cash expenses to be incurred in connection with the Exchange
Offer will be paid by the Issuer and are estimated in the aggregate to be
$225,000.
 
TRANSFER TAXES
 
     Holders who tender their Old Notes for exchange will not be obligated to
pay any transfer taxes in connection therewith, except that holders who instruct
the Issuer to register New Notes in the name of, or request that Old Notes not
tendered or not accepted in the Exchange Offer to be returned to, a person other
than the registered tendering holder will be responsible for the payment of any
applicable transfer tax thereon.
 
CONSEQUENCES OF FAILURE TO EXCHANGE
 
     Holders of Old Notes who do not exchange their Old Notes for New Notes
pursuant to the Exchange Offer will continue to be subject to the restrictions
on transfer of such Old Notes as set forth in the legend thereon and, except in
certain limited circumstances, will no longer have any registration rights with
respect to the Old Notes. In general, the Old Notes may not be offered or sold,
unless registered under the Securities Act, except pursuant to an exemption
from, or in a transaction not subject to, the Securities Act and applicable
state securities laws. The Issuer does not intend to register the Old Notes
under the Securities Act. The Issuer believes that, based upon interpretations
contained in letters issued to third parties by the staff of the Commission, New
Notes issued pursuant to the Exchange Offer in exchange for Old Notes may be
offered for resale, resold or otherwise transferred by each holder thereof
(other than a broker-dealer, as set forth below, and any such holder which is an
"affiliate" of the Issuer within the meaning of Rule 405 under the Securities
Act) without compliance with the registration and prospectus delivery provisions
of the Securities Act provided that such New Notes are acquired in the ordinary
course of such holders' business and such holder has no arrangement or
understanding with any person to participate in the distribution of such New
Notes. If any holder has any arrangement or understanding with respect to the
distribution of the New Notes to be acquired pursuant to the Exchange Offer,
such holder
 
                                       50
<PAGE>   53
 
(i) could not rely on the applicable interpretation of the staff of the
Commission and (ii) must comply with the registration and prospectus delivery
requirements of the Securities Act in connection with any resale transaction.
Each broker-dealer that receives New Notes for its own account in exchange for
Old Notes must acknowledge that it will deliver a prospectus in connection with
any resale of such New Notes. See "Plan of Distribution". In addition, to comply
with the securities laws of certain jurisdictions, if applicable, the New Notes
may not be offered or sold unless they have been registered or qualified for
sale in such jurisdiction or an exemption from registration or qualification is
available and is complied with. The Issuer does not currently intend to take any
action to register or qualify the New Notes for resale in any jurisdiction.
 
                                       51
<PAGE>   54
 
                            BUSINESS AND PROPERTIES
 
     The operations of the Company involve the mining, milling and flotation of
copper ore to produce copper concentrates, the smelting of copper concentrates
to produce blister copper and the refining of blister copper to produce cathode
copper. Silver, molybdenum and small amounts of other metals are also contained
in copper ore as by-products. Silver is sold as an element of blister copper or
is recovered in the refining process. Molybdenum is recovered from copper
concentrate in a molybdenum by-product plant.
 
COPPER PRODUCTION PROCESS
 
     Operations.  The process of producing copper begins at the mine pit. Waste
rock and copper bearing ore are first drilled and blasted and then loaded onto
diesel-electric trucks by electric shovels. Waste is hauled to dump areas.
Copper ore is deposited in rail cars and transported to the crushing circuit
where gyratory crushers break the ore into sizes no larger than 3/4 inch. The
ore is then transported to the rod and ball mills which grind it to the
consistency of powder. This finely ground ore is agitated in a water and
chemical solution and pumped as a slurry to the flotation separator. The
solution is then aerated, causing a froth which carries the copper minerals to
the surface but not the waste rock. The froth is skimmed off and filtered to
produce copper concentrates. The waste rock, called tailings, is sent to the
tailings storage facility. The copper concentrates (which contain a copper grade
of approximately 26% to 28%) are then shipped by rail to the smelter.
 
     At the smelter, the concentrates are blended with fluxes. The concentrates
are then fed into reverberatory furnaces or a Teniente converter where they are
melted, producing "matte" and "slag". Matte from the reverberatory furnaces
contains approximately 35% copper, and matte from the Teniente converter
contains approximately 73% copper. Slag is a residue of the smelting process
containing iron and other impurities. The matte is transferred by ladles to the
converters and is oxidized in two steps. First, the iron sulfides in the matte
are oxidized with silica, producing slag that is returned to the reverberatory
furnaces. Second, the copper in the matte sulfide is oxidized to produce blister
copper. The blister copper contains approximately 98.5% copper. Some of the
blister copper is sold to customers. The remainder is transferred to the Ilo
refinery.
 
     After additional treatment in the anode furnace, the copper is cast into
880-pound anodes and then moved to the refinery's electrolytic tank house. Anode
copper is approximately 99.0% copper. In the electrolytic refinery, anodes are
suspended in tanks containing sulfuric acid and copper sulfate. An electrical
current is passed through the anodes and chemical solution to deposit clean
copper on pure copper plates. The resulting refined copper cathodes are 99.99%
copper. Silver and small amounts of other metals contained in the anodes settle
on the bottom of the tank and are separately recovered.
 
     The Company is also producing copper cathodes at low cost using solvent
extraction/electrowinning technology at its SX/EW facility. In the SX/EW
process, ore is leached with sulfuric acid to extract the contained copper. At
Toquepala, the leachable material includes 495 million tons of previously mined
sulfides, oxides and waste rock which will be leached in place on existing dumps
and an additional 155 million tons of sulfides which will be mined over the next
15 years. At Cuajone, the leachable material includes 15 million tons of
previously mined oxides which will be crushed and placed on pads for heap
leaching. The dilute acid-copper solution from the leaching operation is
agitated vigorously with a solvent containing chemical additives that attract
copper ions. Because the solvent is lighter than water, it rises to the top,
carrying the copper with it. The solvent is then skimmed off and agitated with
an acid solution which releases the copper from the solvent. The resulting acid-
copper solution is transferred to electrowinning tanks where the copper is
plated out on cathodes, as in electrolytic refining. The SX/EW process produces
copper cathodes ready for shipment and sale without any milling, concentrating
or smelting of the ore.
 
TOQUEPALA MINE
 
     The Toquepala mine is a porphyry copper deposit located at an altitude of
10,000 feet on the western flank of the Andes near the Peruvian-Chilean border.
The ore body has been known since the early part of the nineteenth century, but
the economic feasibility of mining this ore body was not proven until 1952.
Construction and mine development began in 1956 and Toquepala has been in
production since 1960.
 
                                       52
<PAGE>   55
 
     The Toquepala copper deposit occurs within the same northwest-trending
copper belt that is the host of the Cuajone deposit. The geology of the
Toquepala deposit consists of diorite bodies and adjacent volcanic rocks that
are intruded by stocks and dikes of dacite porphyry composition. This intrusive
activity was followed by a period of intense hydrothermal alteration and
mineralization accompanied by the formation of breccia pipes.
 
     There have been several phases of copper mineralization associated with
successive periods of brecciation and hydrothermal activity. The result was
disseminated sulfide minerals being deposited in the altered rocks. There is no
close relationship between rock type and intensity of mineralization, although
the highest copper grades occur in the ore breccia regardless of the rock types
that make up the fragments in the breccia.
 
     Within the breccia column, there are zones of relatively homogeneous,
high-grade copper mineralization. However, a north-south trending zone within
the breccia, known as the "jumbled zone", contains high but erratic copper
values. Predicting grades in this "jumbled zone" is difficult.
 
     At December 31, 1996 proven and probable ore reserves were approximately
332 million tons at an average copper grade of 0.82%. Over the remaining life of
the mine, the waste-to-ore ratio is estimated to be 0.9 to 1 although the actual
ratio varies depending on the location of the ore within the mine.
 
     The Toquepala pit currently measures about 1.2 miles in diameter at its
surface perimeter and about 1,300 feet in depth. Operations are conducted in
three eight-hour shifts per day, six days per week. Blast hole drilling is
accomplished with five rotary drills. Over 95% of explosives consumption is in
the form of ammonium nitrate. The mine has 4 shovels of 15 yard capacity, one
shovel of 56 yard capacity and 20 trucks of 120-ton capacity and five 240-ton
capacity trucks. Toquepala also utilizes some rail haulage. The mine is planned
in sequential 35-meter wide push-backs, which is a standard porphyry copper
mining method. Roads are designed at 8% grades and 25 meter widths.
 
     Acquisition of new equipment and technology has been underway at Toquepala
to improve operations since 1991. The Toquepala concentrator was built in
1956-1958 to process 30,000 tons of ore per day and expanded to 43,500 tons per
day. Ore crushing capacity was increased in 1996, and the original 600 small
flotation cells were replaced with 20 large cells, each with 1,500 cubic feet
capacity. The mill incorporates electronic process controls and two ball mills
recently added in 1995 and 1996. Secondary and tertiary crushers have been
upgraded. In 1996, 478,400 tons of concentrate were produced, containing 126,464
tons of copper. In 1995, 481,600 tons of concentrate were produced, containing
128,064 tons of copper.
 
     A molybdenum recovery plant was constructed in 1962. The plant produced
concentrate containing 4.5 and 3.7 million pounds of molybdenum in 1996 and
1995, respectively. In 1996, Toquepala produced approximately 1.4 million ounces
of silver contained in copper concentrates which are sold in copper blister or
recovered in the refining process and subsequently sold. In 1995, Toquepala
produced approximately 1.6 million ounces of silver contained in copper
concentrates.
 
     In addition to an open pit mine, crushers and concentrator, the Toquepala
mine includes maintenance facilities capable of repairing equipment currently in
use. The equipment used at Toquepala is generally in good condition. Toquepala
is connected to Cuajone and Ilo by rail and by road and power is supplied from a
power plant at Ilo via a 66-mile transmission line.
 
                                       53
<PAGE>   56
 
     Set forth below are certain operating data for the periods indicated for
the Toquepala mine.
 
<TABLE>
<CAPTION>
                               SIX MONTHS ENDED
                                   JUNE 30,                             YEAR ENDED DECEMBER 31,
                            ----------------------  ---------------------------------------------------------------
                               1997        1996        1996         1995         1994         1993         1992
                            ----------  ----------  -----------  -----------  -----------  -----------  -----------
<S>                         <C>         <C>         <C>          <C>          <C>          <C>          <C>
MINING OPERATIONS:
Ore mined (in tons)........  9,302,000   8,984,000   18,609,000   16,937,000   15,907,000   16,044,000   15,559,000
Average copper grade.......       0.74%       0.87%        0.81%        0.86%        0.80%        0.83%        0.85%
PRODUCTION:
Copper (in tons) contained
  in concentrates..........     60,067      63,780      126,464      128,064      111,797      115,047      113,232
Silver (in troy ounces)....    624,485     669,171    1,493,529    1,556,417    1,400,561    1,400,561    1,190,726
Molybdenum contained in
  concentrates (in
  pounds)..................  2,858,000   1,568,000    4,483,431    3,674,399    3,057,568    2,570,606    3,616,242
</TABLE>
 
SX/EW FACILITY
 
     Since the 1960s, the Company has stored low grade material at its
properties that is capable of being processed into cathode copper through an
SX/EW process. Of the 665 million tons of stored material averaging 0.22%
copper, at the two mines, 650 million tons of this material are stored at
Toquepala. The SX/EW facility commenced operations in late 1995. In 1996, the
facility produced 46,585 tons of copper cathode at a cash cost below $0.35 cents
per pound.
 
     Set forth below are certain operating data for the periods indicated for
the SX/EW facility.
 
   
<TABLE>
<CAPTION>
                                                           SIX MONTHS
                                                             ENDED              YEAR ENDED
                                                            JUNE 30,           DECEMBER 31,
                                                       ------------------    -----------------
                                                        1997       1996       1996       1995
                                                       -------    -------    -------    ------
    <S>                                                <C>        <C>        <C>        <C>
    Copper (in tons).................................  24,029     22,658     46,585     5,006
</TABLE>
    
 
CUAJONE MINE
 
     The Cuajone mine is located 15 miles northwest of the Toquepala mine and is
also a porphyry copper deposit. Construction and development began in 1969 and
the mine has been in production since 1976.
 
     The Cuajone porphyry copper deposit consists of mineralized stocks of
latite porphyry and intrusive andesite which cut volcanic rocks of andesitic and
rhyolitic composition. A central breccia body consists of altered and
mineralized fragments of volcanic and intrusive rocks, contained in a relatively
fresh latite porphyry matrix.
 
     The dominant fracturing found within the pre-ore and intrusive rocks is a
stockwork cross-fracturing caused by the intrusion of the latite stock.
Superimposed on this stockwork fracturing is the intense faulting, fracturing
and shearing along the northwest-southeast direction. The zone of economic
copper mineralization at Cuajone is typified by its regular shape, homogeneity
of grade, and simple mineralogy. Only the central breccia zone, with its
inclusions of barren latite porphyry, represents major zones of internal waste.
 
     At December 31, 1996, current proven and probable ore reserves were
approximately 1,400 million tons of sulfide ore averaging 0.65% copper. The
average waste-to-ore ratio is estimated to be 1.3 to 1, although the actual
ratio varies depending on the location of the ore within the mine.
 
     The mine is currently roughly circular, about 1.2 miles in diameter, and is
generally about 1,600 feet deep. Operations are conducted in three eight-hour
shifts per day, six days per week. Blast hole drilling is accomplished with four
rotary drills.
 
     Loading is carried out by a fleet of mine shovels ranging in size from 15
to 56-cubic yards capacity. Use of truck and rail transport combines the
flexibility and grade-climbing abilities of trucks with the long-haul efficiency
of rail. There are twelve 240-ton trucks and six 120-ton trucks in the mine. As
part of the capital spending program, a large shovel with a 42-cubic yard
capacity was purchased for the mine in 1994 to work with the 240-ton haul
trucks. Recently, the Company purchased a new 56-cubic yard shovel. It is about
the size of a
 
                                       54
<PAGE>   57
 
three-story building and makes three passes to load a truck for the haul to the
rail line. The mine is planned and operated in sequential 35-meter wide
push-backs. Roads are currently at 8% and 10% gradients and are 25 meters wide.
 
     Ore from the mine is transported by rail to the Cuajone mill and
concentrator, located four miles from the mine. The concentrator's original
capacity of 48,000 tons per day was increased in 1995 to its current capacity of
64,000 tons per day.
 
     In 1996, 613,722 tons of concentrates were produced, containing 166,006
tons of copper. In 1995, 535,046 tons of concentrates were produced, containing
145,491 tons of copper.
 
     Molybdenum is a significant by-product at Cuajone. The distribution of
molybdenite differs from that of copper in that the molybdenum distribution is
erratic in terms of grade, though concentrations of high-grade molybdenum are
found in the northeast and southwest sides of the ore zone. A molybdenum
recovery plant was built in 1980. Production was 4.3 million pounds of
molybdenum in concentrates annually in 1996 and 1995.
 
     In 1996, Cuajone produced approximately 1.7 million ounces of silver
contained in copper concentrates, and sold in copper blister or recovered in the
refining process. During 1995, 1.4 million ounces of silver contained in copper
concentrates were produced.
 
     In addition to an open pit mine, crushers and concentrator, the Cuajone
mine includes facilities for maintaining mining and milling equipment. The
equipment used at Cuajone is generally in good condition. Cuajone is connected
to Toquepala and Ilo by rail and by road and power is supplied from a power
plant at Ilo via a 53-mile transmission line.
 
     Set forth below are certain operating data for the periods indicated for
the Cuajone mine.
 
<TABLE>
<CAPTION>
                            SIX MONTHS ENDED JUNE
                                     30,                                YEAR ENDED DECEMBER 31,
                           -----------------------   --------------------------------------------------------------
                              1997         1996         1996         1995         1994         1993         1992
                           ----------   ----------   ----------   ----------   ----------   ----------   ----------
<S>                        <C>          <C>          <C>          <C>          <C>          <C>          <C>
MINING OPERATIONS:
Ore mined (in tons)......  10,499,000   10,321,000   21,249,000   21,378,000   21,785,000   21,409,000   21,471,000
Average copper grade.....        0.93%        0.95%        0.96%        0.79%        0.84%        0.83%        0.86%
PRODUCTION:
Copper contained in
  concentrates (in
  tons)..................      83,180       80,922      166,006      145,491      156,037      150,410      157,946
Silver (in troy
  ounces)................     744,662      765,024    1,602,977    1,401,253    1,578,638    1,412,979    1,484,368
Molybdenum contained in
  concentrates (in
  pounds)................   1,539,000    2,259,000    4,256,808    4,334,215    3,061,821    3,741,738    3,467,786
</TABLE>
 
ILO SMELTER
 
     The Company's Ilo smelter began operations in 1960. It is located
approximately 10 miles north of the port town of Ilo and is accessible by road.
The smelter was expanded in 1977 to accommodate production from the Cuajone
mine. At the time of the expansion, two new reverberatory furnaces and three
converters were added. In 1996, the smelter processed over one million tons of
concentrate for the fifth successive year. The smelter is of conventional design
and uses two reverberatory furnaces to produce a copper matte which is then
blown in seven Pierce-Smith converters to produce copper metal. The smelter
currently has a nominal blister copper production capacity of 320,000 tons per
year. In 1996, blister copper production was 316,804 tons which was produced
from 294,997 tons of copper in concentrates from the Toquepala and Cuajone mines
and 21,807 tons of purchased copper in concentrates. In 1995, blister copper
production was 317,228 tons, of which 268,761 tons was produced from Toquepala
and Cuajone copper in concentrates, and 48,467 tons was produced from purchased
copper in concentrates. In 1995, the Company installed a Teniente converter to
replace a reverberatory furnace and an oxygen plant to supply oxygen-enriched
air to the new converter.
 
     In 1995, the Company installed a sulfuric acid plant capable of producing
200,000 tons of sulfuric acid per year from partial capture of air emissions of
sulfur dioxide at the Ilo smelter. In 1996, the Company produced
 
                                       55
<PAGE>   58
 
214,000 tons of sulfuric acid. The Company uses a portion of the sulfuric acid
in its SX/EW operation and sells the remainder on the open market.
 
     The following table sets forth the amount of blister copper produced at the
Ilo smelter for the periods indicated.
 
<TABLE>
<CAPTION>
                                                       BLISTER COPPER PRODUCTION
                                  -------------------------------------------------------------------
                                  SIX MONTHS ENDED
                                      JUNE 30,                    YEAR ENDED DECEMBER 31,
                                  -----------------   -----------------------------------------------
                                   1997      1996      1996      1995      1994      1993      1992
                                  -------   -------   -------   -------   -------   -------   -------
                                                               (IN TONS)
<S>                               <C>       <C>       <C>       <C>       <C>       <C>       <C>
From SPCC concentrates..........  124,984   137,643   294,997   268,761   268,432   265,046   268,407
From purchased concentrates.....   13,700     8,255    21,807    48,467    53,671    47,749    35,482
                                  --------  --------  --------  --------  --------  --------  --------
          Total smelter
            production..........  138,684   145,898   316,804   317,228   322,103   312,795   303,889
</TABLE>
 
ILO REFINERY
 
     The Ilo refinery is located 4 miles north of Ilo and was constructed in
1975. The refinery is connected to the Ilo smelter by 6 miles of rail lines.
Recently, the Company completed an expansion of the refinery, which increased
annual capacity to 247,000 tons of copper, all of which is supplied by the
Company's smelter.
 
     The refinery consists of an anode plant, an electrolytic plant and a
precious metals refinery. There are also a number of ancillary installations,
including a desalination plant and a small diesel powered electric generating
station. The refinery produces high quality (Grade A) copper cathode which has a
registered trademark on the LME. The refinery also produces gold, silver,
selenium and nickel sulfate as by-products.
 
     In May 1994, the Company acquired the Ilo refinery from a government-owned
entity through a process of competitive bidding in connection with the
privatization of the Ilo refinery. Substantially all of the revenues of the Ilo
refinery prior to its acquisition by the Company were toll-refining fees under a
contract between the government-owned entity and the Company, the terms of which
were determined by such entity. The Company was required by law to supply all of
the requirements of the refinery, as determined by the government-owned entity,
before the Company could ship to other customers. Because the refinery was
government-owned, access to the financial results of the Ilo refinery prior to
May 1994 is limited and the Company has tried to obtain and has not been
successful in obtaining any reliable financial information regarding such
operations. Revenues of the Company have not been increased due to the
acquisition since the Company's sales continue to represent the invoiced value
of refined copper, however, the Company's refining costs have been reduced.
 
     The Company's costs of operating the Ilo refinery are less than the
refining fee that the Company was previously required to pay for the refining of
its blister copper into copper cathodes. The acquisition of the Ilo refinery has
allowed the Company to integrate its operations from the mining of copper ore
through production of refined copper and to reduce its cash costs.
 
     The following table sets forth the amount of SPCC copper refined at the Ilo
refinery for the periods indicated.
 
<TABLE>
<CAPTION>
                        SIX MONTHS ENDED
                            JUNE 30,                          YEAR ENDED DECEMBER 31,
                      --------------------    --------------------------------------------------------
                        1997        1996        1996        1995        1994        1993        1992
                      --------    --------    --------    --------    --------    --------    --------
<S>                   <C>         <C>         <C>         <C>         <C>         <C>         <C>
Tons of copper....     125,715     101,871     219,800     216,207     210,671     198,375     197,059
</TABLE>
 
EXPANSION AND MODERNIZATION PROGRAM
 
     In September 1996, the Company announced its plan for the expansion of the
Cuajone copper mine and commencement of engineering studies for the
modernization and expansion of its copper smelter at Ilo. The Cuajone mine
expansion represents the beginning of a multi-year expansion and modernization
plan.
 
     Stage I, the expansion of the Cuajone mine, is expected to require a
capital investment of approximately $245 million (including cost escalation) and
is expected to be completed in early 1999. The expansion is designed
 
                                       56
<PAGE>   59
 
to increase ore production at Cuajone by 50% to 96,000 tons per day from the
current 64,000 tons per day and to increase copper production by the Company by
130 million pounds annually or 19%. The project will include upgrading Cuajone's
ore conveying system and installing an additional secondary and tertiary
crushing line, two ball mills, additional flotation capacity and an additional
tailings thickener. The Company also expects to purchase one new 56-cubic yard
shovel and 11 new 240-ton haul trucks.
 
     Stage II, the modernization of the Ilo smelter, is expected to cost
approximately $787 million (including cost escalation and contingencies) based
on the Company's engineering studies, and to be completed in 2003. The Company
is undertaking the smelter project in order to increase smelter production
capacity and to modernize the smelter in accordance with the PAMA. See
"Regulatory Framework -- Regulations, Permitting and Environmental Matters". The
modernization of the Ilo smelter will be completed in phases. A new smelting
furnace utilizing flash furnace technology and associated support and
environmental control facilities will be installed by 2001, which would increase
the capture of sulfur dioxide emissions to 70%. The converter operations will be
modernized by installing either flash technology or conventional Peirce-Smith
converter technology. This choice of converter technology is expected to be made
before 2000 and new converter operations are planned to be in service by 2003.
The time frame allowed to select the converter technology will allow the Company
to evaluate the operation by others of the new flash converting technology. The
Company's modernization plan for the Ilo smelter is designed to avoid
significant disruptions in smelter production of blister copper during
construction and startup. Plans call for the smelter to continue to operate its
existing furnaces and converters until the new installations prove capable of
operating reliably at designed rates. Upon completion of the smelter
modernization, management expects that 95% or more of smelter sulfur emissions
will be captured.
 
ELECTRICAL POWER
 
     Electrical power for the Company's operating facilities is generated by a
thermal electric plant owned and operated by a subsidiary of Tractebel and
located adjacent to the Ilo smelter. Power generation capacity is currently 110
megawatts. In addition, the Company has 30 megawatts of power generation
capacity from waste heat boilers in the smelter and two small hydro-generating
installations at Cuajone. In July 1997, the installation of a new gas turbine
owned by the subsidiary of Tractebel was completed. This new turbine will
increase capacity to approximately 180 megawatts. Power is distributed over a
139-mile, closed loop transmission circuit. The power generation plant consumes
approximately two million barrels of Number 6 fuel oil per year. Fuel is
purchased from a variety of sources on a spot purchase basis and there are no
government related restrictions on purchase sources. There have been no
significant reductions or interruptions of any operations because of energy
shortages.
 
     In February 1997, the Company entered into agreements with Tractebel for
the sale of the new turbine at the power plant and a 20-year power purchase
agreement for its copper operations in Peru. In April 1997, the Company sold its
power generation facilities at Ilo, Peru. The power purchase agreement contains
provisions obligating Tractebel to construct additional capacity upon notice to
meet the Company's increased electricity requirements from the planned expansion
and modernization. The parties also entered into an agreement for the sharing of
certain services between the power plant and the Company's smelter at Ilo. Under
this agreement, the Company's cost of power will increase somewhat from its
current level, while the Company will benefit by avoiding significant capital
expenditures that would be required to meet the needs of the expanded
operations.
 
OTHER FACILITIES AND WATER RESOURCES
 
     The Company owns and operates a standard gauge railroad connecting the
mines at Cuajone and Toquepala with the smelting and refining facilities at Ilo
which is used to transport industrial machinery and copper concentrates. The
rail line is over 134 miles in length and includes 16 miles of tunnels between
Toquepala and Cuajone. The Company's rail equipment includes 32 locomotives and
approximately 600 rail cars and self-propelled utility cars.
 
     The Company owns and operates port facilities in Ilo, where it receives
supplies and equipment and from where it ships refined and blister copper.
 
                                       57
<PAGE>   60
 
     The Company provides housing for approximately 4,000 employees and their
families at townsites in Toquepala, Cuajone and Ilo. The Company also provides a
full range of social services including modern hospitals and schools for
employees and their families.
 
     Water sources for operations at Toquepala and Cuajone are in the high
sierra at elevations of approximately 13,000 feet. SPCC has government water
concessions for well fields at Huaitiri and Titijones and surface water rights
from Lake Suches. Water flows from the fields through a distribution system to
reservoirs at Pampa de Vaca and Vina Blanca and on to Toquepala and Cuajone.
Water is used primarily for milling operations and population support. Average
water consumption for operations at Toquepala and Cuajone is 16,000 gallons per
minute.
 
     The Company operates desalination plants at Ilo capable of producing 1,000
gallons per minute of water for industrial and domestic use.
 
RESERVES
 
     The Company calculates its ore reserves by methods generally applied within
the mining industry and in accordance with the regulation of the Commission. All
mineral reserves are estimated quantities of proven and probable ore that under
present and anticipated conditions may be economically mined and processed by
the extraction of their mineral content.
 
     The term "proven reserves" means ore reserves for which (a) quantity is
computed from dimensions revealed in outcrops, trenches, workings or drill
holes; grade and/or quality are computed from the results of detailed sampling;
and (b) the sites for inspection, sampling and measurement are spaced so closely
and the geologic character is so well defined that size, shape, depth and
mineral content of reserves are well established. The term "probable reserves"
means ore reserves for which quantity and grade and/or quality are computed from
information similar to that used for proven reserves, but the sites for
inspection, sampling and measurement are farther apart or are otherwise less
adequately spaced. The degree of assurance, although lower than that for proven
reserves, is high enough to assume continuity between points of observation.
 
     The following table lists the Company's proven and probable sulfide ore
reserves as well as the average grade of such ore:
 
<TABLE>
<CAPTION>
                                                                           ORE RESERVES AT
                                                                          DECEMBER 31, 1996
                                                                          -----------------
    <S>                                                                   <C>
    TOQUEPALA MINE(1):
      Ore reserves (in millions of tons):...............................          332
      Grade-copper......................................................         0.82%
      Grade-molybdenum..................................................        0.039%
 
    CUAJONE MINE(2):
      Ore reserves (in millions of tons):...............................        1,400
      Grade-copper......................................................         0.65%
      Grade-molybdenum..................................................        0.023%
</TABLE>
 
- ---------------
(1) The average mill recovery rate at Toquepala in 1996 was 84.2%. The grade of
    copper at Toquepala adjusted for the copper equivalent value of the
    molybdenum and silver content using the Company's realized price for copper,
    silver and molybdenum oxide for 1996 would be 0.91% copper.
 
(2) The average mill recovery rate at Cuajone in 1996 was 81.7%. The grade of
    copper at Cuajone adjusted for the copper equivalent value of the molybdenum
    and silver content using the Company's realized price for copper, silver and
    molybdenum oxide for 1996 would be 0.72% copper.
 
                                       58
<PAGE>   61
 
     The Company also has leachable reserves at Toquepala and Cuajone. The
following table lists the Company's leachable reserves and the average grade of
the leachable material:
 
<TABLE>
<CAPTION>
                                                                          LEACHABLE RESERVES
                                                                         AT DECEMBER 31, 1996
                                                                         --------------------
    <S>                                                                  <C>
    TOQUEPALA MINE:
      Ore reserves (in millions of tons):..............................           650
      Grade-copper.....................................................          0.20%
    CUAJONE MINE:
      Ore reserves (in millions of tons):..............................            15
      Grade-copper.....................................................          0.98%
</TABLE>
 
     In addition, results of drilling at Toquepala and Cuajone have identified
mineralized material consisting of 200 million tons grading 0.71% copper at
Toquepala and 180 million tons grading 0.56% copper at Cuajone. This mineralized
material will not qualify as proven and probable reserves until such time as a
final and comprehensive economic and technical feasibility study has been
completed demonstrating that such additional material can be economically mined.
 
PRODUCTION COSTS OF COPPER
 
     Presented below is a table summarizing the Company's production costs for
copper sold during each period indicated below. The Company's production costs
for copper sold include all operating, administrative and overhead costs net of
margin realized on the sale of copper produced from purchased concentrates. Also
included as freight, refining and other sales costs are certain costs
representing allowances or costs incurred on the sale of blister copper that are
reported as deductions from net sales or in cost of products sold on the
financial statements. By-product credits include the net realized value of
silver and molybdenum sales. This calculation excludes the effects of exchange
gains or losses, workers' participation, interest income and expenses and other
income or expense.
 
<TABLE>
<CAPTION>
                                                   SIX MONTHS
                                                      ENDED
                                                    JUNE 30,            YEAR ENDED DECEMBER 31,
                                                  -------------     --------------------------------
                                                  1997     1996     1996     1995      1994     1993
                                                  ----     ----     ----     -----     ----     ----
                                                                (PER POUND OF COPPER)
<S>                                               <C>      <C>      <C>      <C>       <C>      <C>
Cost of products sold.........................    52.1c    45.3c    47.6c     49.7c    54.2c    47.7c
Freight, refining fees and allowances and
  other sales costs...........................     5.1      5.1      5.1       5.9     10.5     15.3
By-product credits............................    (6.7)    (5.3)    (5.7)    (11.6)    (6.3)    (5.1)
Administrative expenses.......................     7.5      7.0      6.9       8.3      8.0      9.0
                                                  ----     ----     ----      ----     ----     ----
  Total cash cost of products sold............    58.0     52.1     53.9      52.3     66.4     66.9
  Depreciation, amortization and depletion....     7.5      6.6      6.9       6.6      7.3      6.8
                                                  ----     ----     ----      ----     ----     ----
     Total....................................    65.5c    58.7c    60.8c     58.9c    73.7c    73.7c
                                                  ====     ====     ====      ====     ====     ====
</TABLE>
 
SALES OF METALS AND HEDGING
 
     In 1994, SPCC entered into two long-term copper sales contracts for periods
of seven and ten years covering approximately 72,750 tons of copper.
Substantially all of the remaining copper produced by the Company is sold under
annual contracts. For annual and long-term contracts, pricing is based on
prevailing monthly average copper prices quoted on the LME for a quotational
period, generally being the month of, the month prior, or the month following
the scheduled month of shipment or delivery according to the terms of the
contract. To the extent not sold under annual or long term contracts, copper may
be sold on commodity exchanges or on a spot sale basis to merchants and
consumers.
 
     The Company's smelter currently has a nominal capacity of 300,000 tons of
blister copper per year while the Ilo refinery has the capacity to refine
approximately 247,000 tons of copper cathodes. Therefore, the Company
 
                                       59
<PAGE>   62
 
sells approximately one-fifth of its copper to other refiners in the form of
blister. Blister copper is typically sold by reference to the LME market price
of copper at the time of shipment less a refining allowance that the Company
negotiates with its customers on an annual basis. During the past several years,
the amount of the refining allowance has varied widely from time to time
depending on world market conditions for blister copper at such time.
 
     Silver is sold under annual contracts or in spot sales and molybdenum is
sold in concentrate form to roasting plants and merchants and other refiners
under annual contracts. Sales prices are based on prevailing monthly averages of
molybdenum dealer oxide high/low prices as quoted in "Metals Week" for a
quotational period generally being the month of, the month prior to, or the
month following the scheduled month of shipment or delivery according to the
terms of the contract.
 
     Depending on metal markets and other conditions, the Company may enter into
forward sales, purchase put options or establish synthetic put options to reduce
or eliminate the risk of copper price declines on its anticipated future
production. Put options purchased by the Company establish a minimum price for
the production covered by such put options and permit the Company to participate
in price increases above the strike price of such put options. Forward sales
establish a selling price for future production at the time they are entered
into, thereby eliminating the risk of declining prices but also eliminating
potential gains on price increases if not bought back. Synthetic put options are
established by entering into a forward sale and purchasing a call option for the
same quantity of the relevant metal and for the time period relating to such
forward sale. The forward sale establishes a minimum price that will be
realized, while the call option permits the Company to participate in price
increases.
 
EMPLOYEES
 
     At June 30, 1997 the Company employed approximately 4,800 persons,
approximately 60% of whom were covered by labor agreements with nine labor
unions. During 1994 and 1995, the Company reduced its workforce by some 1,100
employees as part of a cost reduction effort. In connection with its purchase of
the Ilo refinery in May 1994, the Company added approximately 475 employees to
its workforce, of whom 300 were represented by two unions. The Company
experienced significant work stoppages prior to 1991; thereafter the Company
experienced no work stoppages in 1991 and 1993 and only limited work stoppages
in 1992. The Company experienced only one work stoppage in 1994, a three-day
strike at the smelter, which was declared illegal by the Ministry of Labor. No
work stoppages occurred during 1995 and 1996.
 
     The Company has completed negotiations for new five-year labor agreements
with all nine of its unions as of December 31, 1996. Management believes the new
agreements allow for more flexible work practices and increases in productivity.
In addition, the Company continues to sign individual one-year no strike
agreements with its employees.
 
     SPCC's employees largely reside in the town sites of Toquepala, Cuajone and
Ilo and more than 5,100 houses and apartments have been built by the Company for
its employees. This housing together with maintenance and utility services
(including water and electricity) are provided without cost to the majority of
SPCC's employees. These town site communities include educational and medical
facilities, churches, social clubs, shopping, banking and other needed services.
 
     SPCC supports an on-site school system for almost 4,000 of its employees'
children. Textbooks, uniforms, transportation and school supplies are provided
free of charge. Educational subsidies are also made to approximately 1,700
students attending private schools and universities outside the Company's
operating areas. SPCC maintains a total of 19 separate school facilities. Adult
education is sponsored in all three areas and includes continuing technical
training for workers in their areas of specialty and adult academic programs.
 
     Health care is provided free of charge to employees and family members at
three hospitals in Toquepala, Cuajone and Ilo.
 
LEGAL PROCEEDINGS
 
     In February 1993, the Mayor of Tacna brought a lawsuit against SP Limited
seeking $100 million in damages from alleged harmful deposition of tailings,
slag and smelter emissions. On May 3, 1996, the Superior
 
                                       60
<PAGE>   63
 
   
Court of Tacna, Peru affirmed the lower court's dismissal. In May 1996, the
plaintiff appealed to the Peruvian Supreme Court. In early September 1997, the
Peruvian Supreme Court declined to grant discretionary review of the appeal.
    
 
   
     In April 1996, SP Limited was served with a complaint filed in Peru by
approximately 800 former employees challenging the accounting of the Company's
Peruvian Branch and its allocation of financial results to the Mining Community,
the former legal entity representing workers in Peruvian mining companies, in
the 1970s. The complaint seeks the delivery of a substantial number of labor
shares of the Peruvian Branch plus dividends and contains similar allegations to
those made in a prior lawsuit dismissed in September 1995. Subsequently, 127
additional former employees filed a similar lawsuit. With respect to the first
lawsuit, during the second quarter of 1997, SP Limited was served with an
adverse opinion by the lower court. Peruvian outside counsel has informed SP
Limited that the lower court decision is not supported by facts or the law and
that the possibility that it will not be reversed or nullified by Peruvian
courts following appeal is remote. An appeal was filed during the second quarter
of 1997. With respect to the second lawsuit, in late August 1997, the district
court dismissed the complaint, and the plaintiffs have appealed that decision.
    
 
   
     SP Limited, Asarco, other present and former corporate shareholders of SP
Limited and certain other companies were defendants in a lawsuit in federal
district court in Corpus Christi, Texas brought in September 1995 by 698
Peruvian plaintiffs seeking damages for personal injury and property damage
allegedly caused by the operations of SP Limited in Peru. On May 19, 1997, the
appellate court affirmed the district court's orders dismissing the complaint
and from an earlier order of that court denying plaintiffs' motion to remand the
case to state court. The time for filing a petition for certiorari with the
Supreme Court of the United States has expired with no petition having been
filed. The case is therefore concluded.
    
 
     It is the opinion of management that the outcome of the legal proceedings
mentioned, as well as other miscellaneous litigation and proceedings now
pending, will not materially adversely affect the financial position or results
of operations of the Company and its consolidated subsidiaries. However, it is
possible that the outcome of the legal proceedings mentioned could have a
material effect on quarterly or annual operating results, when they are resolved
in future periods.
 
SUBSIDIARIES AND JOINT VENTURES
 
     The Company owns 99.5% of Fomenta S.A., a construction company and 99.99%
of Recursos e Inversiones Andinas S.A., a holding company and office supply
distributor. In addition, certain of the Company's exploration and development
activities are carried out through Compania Minera Los Tolmos, S.A. in
association with other Peruvian companies. The Company conducts much of its
purchasing and logistical operations through its wholly-owned subsidiary,
Logistics Services Incorporated. The Company does not believe the subsidiaries
or joint ventures to be material to its business. Furthermore the Company
believes the services these entities provide could be obtained from third
parties at reasonable cost.
 
COMPETITION
 
     The Company believes that competition in the copper market is based upon
price, quality of product and timing of delivery. The Company competes with
other mining companies and private individuals in connection with the
acquisition of mining claims and mineral leases and in connection with the
recruitment and retention of qualified employees.
 
SECURITY
 
     SPCC's operations and headquarters are in two distinct regions of Peru.
Mining, smelting and refining operations are in the southern part of Peru and
the headquarters of the Branch are in the capital city of Lima. Terrorist
activity has not had an adverse impact on the Company's operations.
 
                                       61
<PAGE>   64
 
                           OVERVIEW OF COPPER MARKET
 
     Copper is an internationally traded commodity the price of which is
effectively established on terminal markets including the LME and COMEX. The
following table sets forth quarterly average prices for refined copper since
1993 on the LME.
 
                            AVERAGE COPPER PRICE(1)
                                   ($/POUND)
 
   
<TABLE>
    <S>                                                                           <C>
    1994
    First Quarter...............................................................  $0.846
    Second Quarter..............................................................   0.972
    Third Quarter...............................................................   1.114
    Fourth Quarter..............................................................   1.259
 
    1995
    First Quarter...............................................................  $1.332
    Second Quarter..............................................................   1.311
    Third Quarter...............................................................   1.365
    Fourth Quarter..............................................................   1.318
 
    1996
    First Quarter...............................................................  $1.167
    Second Quarter..............................................................   1.123
    Third Quarter...............................................................   0.897
    Fourth Quarter..............................................................   0.977
 
    1997
    First Quarter...............................................................  $1.098
    Second Quarter..............................................................  $1.137
    Third Quarter...............................................................  $1.029
</TABLE>
    
 
- ---------------
(1) Source: LME, Monthly Average Settlement.
 
     Historically, the price of copper has been affected primarily by levels of
production and consumption, prevailing trends of inventory levels and, to a
lesser degree, inventory carrying costs (primarily interest rates),
international exchange rates and the actions of participants in the commodity
markets. These factors have been of varying importance in influencing the
prevailing price of copper and often have had divergent impacts on such price.
 
     The primary uses of copper are in the building and construction industry,
electrical and electronic products and, to a lesser extent, industrial machinery
and equipment, consumer and general products and transportation. The consumption
of copper for these purposes is affected by various factors, including trends in
the world economy and market competition with other metals and materials.
 
                                       62
<PAGE>   65
 
     The following table sets forth western world refined copper production
(excluding imports to the western world), consumption, inventories and average
annual prices for the past five years. Inventories shown are stocks of refined
copper held by western world refiners, consumers and those carried on the LME
and the COMEX.
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED DECEMBER 31
                                               ---------------------------------------------------
                                                1996        1995       1994       1993       1992
                                               -------     ------     ------     ------     ------
                                                  (THOUSANDS OF TONS EXCEPT FOR AVERAGE PRICE)
<S>                                            <C>         <C>        <C>        <C>        <C>
Production(1)..............................     11,072     10,278      9,915     10,054      9,916
Consumption(1).............................     11,757     11,412     11,257     10,314     10,038
Inventories (at end of period)(1)..........        547        771        897      1,230        918
Average price (per pound)(2)...............    $  1.04     $ 1.33     $ 1.05     $ 0.87     $ 1.04
</TABLE>
 
- ---------------
(1) Source: World Bureau of Metal Statistics
 
(2) Source: LME, Monthly Average Settlement
 
     Refined copper inventories held by consumers, refiners and commodity
exchanges at December 31, 1996, as reported by the World Bureau of Metal
Statistics, were 547,000 tons, consisting of 189,000 tons held by consumers,
231,000 tons at western world refiners and 166,000 tons held in warehouses of
commodity exchanges in New York and London.
 
                       DESCRIPTION OF EXPORT RECEIVABLES
 
EXPORT RECEIVABLES
 
  Sales Process
 
     SP Limited sells substantially all of its copper production directly to
customers pursuant to Dollar-denominated annual and long-term sales contracts.
The majority of its copper production is sold to customers in Europe, Asia and
the United States. In general, SP Limited seeks each year to sell 100% of its
forecast mine production pursuant to long-term or annual sales contracts. Any
excess is generally sold on a spot basis to entities with whom SP Limited has
commercial relationships.
 
     SP Limited's principal copper customers include Union Miniere, Mitsui,
Pechiney Group, BICC Group, Asarco, Cerro Sales Corporation, MG Metal &
Commodity Co. Ltd., Delta Enfield Metals, Ltd., AB Electrokoppar and Colata
Continua Italiana SpA. These customers are expected to account for approximately
60% of SP Limited's total sales in 1997. SP Limited has a long-term commitment
to sell 46,300 tons of copper annually to Union Miniere. This contract expires
in 2003. SP Limited also has a long-term commitment to sell 26,500 tons of
copper annually to Mitsui, which expires in 2000. The receivables under the
Mitsui copper sales contract are Excluded Receivables.
 
     The remaining 40% of SP Limited's total sales that is not accounted for by
the customers described above is accounted for by other customers around the
world. SP Limited has long-standing relationships with the majority of its
customers and relatively stable sales volumes to its customers.
 
     SP Limited anticipates that approximately 6% of its copper sales in 1997
will be to domestic purchasers. In 1996, approximately 2% of copper sales were
sold domestically.
 
     SP Limited's electrolytic copper cathodes are registered on the LME. All of
SP Limited's copper sales, including domestic sales, are denominated in U.S.
dollars (except in certain limited circumstances), and use LME prices as a
reference. Domestic sales are denominated in U.S. dollars, but are payable in
Soles at the prevailing exchange rate. Most customers receive shipments on a
monthly basis at a constant volume throughout the year. As a result, there is
little seasonality in SP Limited's sales volumes.
 
     SP Limited generally invoices its customers for copper sales on the basis
of market prices for refined metals and the amounts of metal contained in
unrefined products. Provisional invoices are issued upon shipment to customers.
Adjusted final invoices are issued following determination of the average LME
price for the month of
 
                                       63
<PAGE>   66
 
final pricing as established by the contract, which is generally the month
following delivery of the copper. In the case of blister copper sales, the
invoice reflects a deduction for third party refining charges. Copper is shipped
from the port of Ilo and title and risk of loss of the shipment pass to the
customer upon the loading of copper onto the ship at Ilo.
 
     SP Limited's sales contracts provide for cash payment upon delivery of
documents, which entitle the customers to take possession of the copper at the
port of arrival. Blister copper contracts provide for payment of 90% of the
estimated amount due upon delivery of documents, with the remaining 10% due
following receipt of final assays to determine the actual amount of contained
copper and other metals. Contracts for sales to European customers call for cash
payment and delivery of documents upon delivery of copper to the port of
arrival. Contracts for sales to Asian customers call for cash payment and
delivery of documents twenty days after shipment, which is usually two or more
weeks before the copper's arrival at its Asian destination. As an accommodation
to certain long-standing customers, SP Limited provides documents prior to
payment in accordance with industry practice.
 
     SP Limited's internal credit group evaluates the creditworthiness of each
potential customer by reviewing financial records and external credit reports.
SP Limited monitors its outstanding receivables and takes appropriate actions to
collect full payment for all of its sales. SP Limited has experienced two
uncollected debts during the past fifteen years totaling US$410,000.
 
MAJOR EXPORT CUSTOMERS
 
     The following is a brief description of the Company's principal export
customers. These customers represent approximately 60% of SPCC's total expected
sales in 1997. The remaining 40% of sales is accounted for by other clients
around the world. As discussed above, most of these customers receive shipments
on a monthly basis. Consequently, SPCC's sales volume is relatively consistent
throughout the year. Sales information for 1997 for SPCC's principal export
customers is provided in the table following this discussion.
 
     Union Miniere.  Headquartered in Brussels, Belgium, the Union Miniere Group
is a subsidiary of Societe Generale de Belgique and is engaged in extractive
metallurgy and the refining of non-ferrous metals including lead, copper, gold
and silver. Through one of its subsidiaries, Union Miniere is involved in metals
sales, trading and brokerage in the futures market. Union Miniere is also
affiliated with Sogem and Sogem Afrimet.
 
     Mitsui.  Mitsui is an international trading company handling a wide range
of products, including non-ferrous metals.
 
     Pechiney Group ("Pechiney").  Pechiney, headquartered in France, produces a
wide range of metal and chemical products. Within the Pechiney Group, the
Company sells mainly to Pechiney World Trade USA ("PWT"), a subsidiary of
Pechiney Metals Corporation. PWT, directly and through its subsidiaries, imports
and exports non-ferrous metals, aluminum products, stainless steel, carbon
materials, industrial machinery, ferro alloys and chemicals.
 
     BICC Group ("BICC").  BICC manufactures cables and provides construction
and engineering services. The cable business is managed through regional
operations based in Europe, North America, Australia and Asia-Pacific.
 
     ASARCO.  Headquartered in New York, NY, Asarco is one of the world's
largest producers of non-ferrous metals, principally copper, lead, zinc, silver
and molybdenum. In addition, Asarco produces construction aggregates and
specialty chemicals. Asarco holds 54.1% of the outstanding capital stock of the
Company.
 
     MG Metal & Commodity Co. Ltd. ("MCC").  MCC is a broker and dealer in
non-ferrous metals.
 
     Delta Enfield Metals Ltd. ("Enfield").  Enfield is engaged in the business
of copper rolling and extruding, non-ferrous metal recovery and non-ferrous
metals extruding and rolling.
 
     Cerro Sales Corporation ("Cerro Sales").  Cerro Sales sold to MCC the
business and most of the assets of Cerro Sales. Metallgesellschaft's MG Handel
unit owns approximately 85% of MCC and is a leading worldwide
 
                                       64
<PAGE>   67
 
copper merchant, which deals in refined and unrefined copper, scrap copper and
other non-ferrous and precious metals. Cerro Sales is a member of COMEX.
 
     AB Electrokoppar ("Elektrokoppar").  Elektrokoppar is one of the major
Scandinavian copper converters and CCR producers. Its shareholders include ABB
Norden Holding, Vasteras and Asea Brown Boveri.
 
     Colata Continua Italiana SpA ("Colata").  Colata's main business line is
the continuous casting of copper into various copper products.
 
                1997 SALES QUOTAS TO PRINCIPAL EXPORT CUSTOMERS
                                  (SHORT TONS)
 
<TABLE>
<CAPTION>
                                                                               PRODUCTS
                                                                   --------------------------------
                                                                     ILO         SX/EW       BLISTER
                            CUSTOMER                               CATHODES     CATHODES     COPPER
- -----------------------------------------------------------------  --------     --------     ------
<S>                                                                <C>          <C>          <C>
Union Miniere (Belgium)..........................................     6,600         660      46,300
Mitsui (Japan)...................................................    16,100      20,400
Pechiney Group (France)..........................................    27,800         550
BICC (England)...................................................    18,500       1,300
Asarco (U.S.)....................................................    18,600
MG Metals (England)..............................................    12,600
Enfield (England)................................................    10,400         220
Cerro Sales (U.S.)...............................................     7,550       2,800
Electrokoppar (Sweden)...........................................     9,900
Colata (Italy)...................................................     9,900
                                                                    -------      ------      ------
          Total..................................................   137,950      25,930      46,300
                                                                    =======      ======      ======
</TABLE>
 
                              REGULATORY FRAMEWORK
 
MINING AND PROCESSING CONCESSIONS
 
     The Company has concessions from the Peruvian government for its
exploration, exploitation, extraction and/or production operations. The
concessions are in full force and effect under applicable Peruvian laws and the
Company is in compliance with all material terms and requirements applicable to
the concessions and is not under any condition, occurrence or event that would
cause the revocation, cancellation, lapsing, expiration or termination thereof
except that the Company may, from time to time, let lapse, revoke, cancel or
terminate concessions that are not material to the conduct of its business. The
principal concessions are (i) the mining concessions at Toquepala and Cuajone,
(ii) the processing concessions of the concentrators located at Cuajone and
Toquepala and the processing concessions of the smelter and refinery located
near Ilo. The concessions have an indefinite term, subject to payment by SPCC of
concession fees of up to $2 per hectare annually for the mining concessions and
a fee based on nominal capacity for the processing concessions. Fees paid in
1996 were approximately $183,300.
 
REGULATIONS, PERMITTING AND ENVIRONMENTAL MATTERS
 
     The Company's rights to mine and process copper and other metals are
derived from mining and processing concessions, which terms are indefinite and
may be maintained by relatively small periodic payments. In 1969, the military
government of Peru required concession holders to develop their concessions in
accordance with a timetable or forfeit them. This requirement was discontinued
in 1981. There has been no such development requirement under more recent
Peruvian governments. The rights and obligations of mining and processing
concession holders are currently set forth in the General Mining Law (Single
Unified Text, Supreme Decree No. 014-92-EM) that is administered by the Ministry
of Energy and Mines. The principal changes in the current
 
                                       65
<PAGE>   68
 
General Mining Law relate to the abolition of governmental monopolies and the
expansion of availability and scope of agreements for tax stability and foreign
exchange stability.
 
     The Cuajone mine, the Toquepala mine, the Ilo smelter and the Ilo refinery
have all necessary operating permits. All future exploration and development
projects require or will require a variety of permits. Although the Company
believes the permits for these projects can be obtained in a timely fashion,
permitting procedures are complex, time-consuming and subject to potential
regulatory delay. The Company does not believe that existing permitting
requirements or other environmental protection laws and regulations will have a
material adverse effect on its business, financial condition or results of
operations. However, the Company cannot be certain that future changes in laws
and regulations would not result in significant additional expense, capital
expenditures, restrictions or delays associated with the development and
operation of the Company's properties. The Company cannot predict whether it
will be able to renew its existing permits or whether material changes in
existing permit conditions will be imposed. Non-renewal of existing permits or
the imposition of additional conditions could have a material adverse effect on
the Company's financial condition or result of operations.
 
     The Company's exploration, mining, milling, smelting and refining
activities are subject to Peruvian laws and regulations, including environmental
laws and regulations, which change from time to time. The Company's recently
approved PAMA sets forth the investment to be made by the Company to comply with
Peruvian environmental regulations applicable to its operations. To implement
the PAMA, the Company is required to make a minimum annual investment of 1% of
net annual sales until compliance is met. The PAMA will require the Company to
make significant additional capital expenditures to achieve compliance with the
maximum permissible levels for its emission and waste discharges within a period
of five years, except for environmental controls applicable to its smelter
operation which must be put in place within ten years. Upon completion of the
smelter modernization, management expects that 95% or more of smelter emissions
will be captured. The PAMA contemplates a number of environmental projects, the
largest and most capital intensive of which is the planned modernization of the
Ilo smelter. See "Management's Discussion and Analysis of Financial Condition
and Results of Operations -- Expansion and Modernization Project". Management
believes that under current Peruvian law and regulations, compliance with the
PAMA will satisfy the MPL requirements pertaining to the Company's operations
during the applicable five or ten year implementation period. The Company
remains, however, subject to other environmental requirements applicable to its
operations.
 
     The Company incurred capital expenditures for environmental projects of
approximately $29.8 million in 1996. During the first six months of 1997, the
Company's capital expenditures in respect of environmental projects (including
expenditures under the PAMA) were $13.9 million and it estimates that it will
incur expenditures of approximately $19.4 million during the remainder of 1997.
 
     The development in the future of more stringent environmental protection
programs in Peru could impose constraints and additional costs on the Company's
operations, which might require the Company to make significant additional
capital expenditures.
 
     Although the Company believes that it is in substantial compliance with all
applicable laws, the effect of any future regulatory changes on the Company's
operations cannot presently be determined.
 
                                       66
<PAGE>   69
 
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
     The following table sets forth the current directors and executive officers
of the Company, their ages as of June 30, 1997, and their positions. In each
case where an officer's or director's service to SPCC predates the formation of
SPCC in September 1995, it includes services rendered by such persons in their
former capacities as officers and/or directors of SPCC's predecessor, SP
Limited, which is now a wholly-owned operating subsidiary of SPCC.
 
<TABLE>
<CAPTION>
            NAME               AGE                                 POSITION
- -----------------------------  ---     ----------------------------------------------------------------
<S>                            <C>     <C>
Richard de J. Osborne(1).....   63     Chairman of the Board and Director
Charles G. Preble(1)(2)(3)...   64     President, Chief Executive Officer and Director
Charles B. Smith(2)..........   59     Executive Vice President and General Manager (Operations, Peru)
Ronald J. O'Keefe(2)(3)......   54     Executive Vice President and Chief Financial Officer
Kevin R. Morano(1)(2)(3).....   44     Vice President and Director
Winston Cundiff, III(2)......   50     Vice President (Human Resources, Peru)
Hans A. Flury(2)(3)..........   46     Vice President (Legal, Peru)
Guillermo D. Payet(2)........   58     Vice President (Finance, Peru)
Eduardo Santistevan(2).......   56     Vice President (Logistics, Peru)
Frank H. Tweddle(2)..........   38     Vice President (Commercial, Peru)
Augustus B.                         
  Kinsolving(2)(3)...........   57     Secretary, General Counsel and Director
Brendan M. O'Grady(2)........   53     Comptroller
Thomas J. Findley, Jr.(2)....   49     Treasurer
Amb. Everett E. Briggs.......   63     Director
Jaime Claro..................   61     Director
Francis R. McAllister........   54     Director
John F. McGillicuddy.........   66     Director
Robert J. Muth...............   64     Director
Robert M. Novotny............   48     Director
Robert A. Pritzker(1)........   71     Director
Michael O. Varner............   56     Director
J. Steven Whisler............   42     Director
David B. Woodbury............   57     Director
Douglas C. Yearley(1)........   61     Director
</TABLE>
 
- ---------------
(1) Member of the Executive Committee.
 
(2) Officer of SP Limited.
 
(3) Director of SP Limited.
 
     For a discussion of certain agreements among the Class A common
stockholders relating to the election of directors, see "Certain
Transactions -- Stockholders' Agreement".
 
     Richard de J. Osborne, Chairman of the Board and Director.  Mr. Osborne has
been Chairman of the Board since February 1996 and a Director since 1976. He has
been Chairman of the Board, Chief Executive Officer and President of Asarco
since 1985 and a director of Asarco since 1976. He is also a director of
Schering-Plough Corporation, The BFGoodrich Company, Grupo Mexico, S.A. de C.V.
and The Tinker Foundation Incorporated.
 
     Charles G. Preble, President, Chief Executive Officer and Director.  Mr.
Preble has been President and Chief Executive Officer since 1985 and a director
since 1984. He is also a director of InterBanc, Lima.
 
                                       67
<PAGE>   70
 
     Charles B. Smith, Executive Vice President and General Manager (Operations,
Peru).  Mr. Smith has been Executive Vice President since 1996. He was Vice
President from 1992 to 1996. From 1988 to 1992, he served as Vice President-U.S.
Operations for ARCO Coal Company (coal production and marketing). He is a
director of Sociedad Nacional de Mineria y Petroleo.
 
     Ronald J. O'Keefe, Executive Vice President and Chief Financial
Officer.  Mr. O'Keefe has been Executive Vice President and Chief Financial
Officer of the Company since April 1995. Previously, he was Controller of Asarco
from 1982 through March 1995.
 
     Kevin R. Morano, Vice President and Director.  Mr. Morano has been Vice
President and a director since 1993. He has served as Vice President-Finance and
Chief Financial Officer of Asarco since 1993. Prior to that he was general
manager of Asarco's Ray Complex from 1991 to 1993. From 1989 to 1991 he served
as Asarco's Treasurer. He is an alternate director of Grupo Mexico, S.A. de C.V.
 
     Winston Cundiff, III, Vice President (Human Resources, Peru).  Mr. Cundiff
has been Vice President (Human Resources, Peru) since September 1996. From 1995
to August 1996 he served as General Director of Human Resources for the Company.
From 1991 to 1994, he served as Director, Human Resources Training and Quality
for Liquid Air Corporation.
 
     Hans A. Flury, Vice President (Legal, Peru).  Mr. Flury has been Vice
President (Legal, Peru) since 1989. He is a director of Sociedad Nacional de
Mineria y Petroleo.
 
     Guillermo D. Payet, Vice President (Finance, Peru).  Mr. Payet has been
Vice President (Finance, Peru) since 1991. Prior to that, he was Vice President,
Finance and Logistics (Peru) from 1987 to 1991.
 
     Eduardo Santistevan, Vice President (Logistics, Peru).  Mr. Santistevan has
been Vice President (Logistics, Peru) since 1991. From 1988 to 1990, he served
as General Maintenance Superintendent.
 
     Frank H. Tweddle, Vice President (Commercial, Peru).  Mr. Tweddle was
elected Vice President on May 1, 1997. From May 1994 to April 1997, Mr. Tweddle
was Assistant Director of Marketing for the Company. From 1988 to April 1994 he
was Vice President Trading for Minpeco USA.
 
     Augustus B. Kinsolving, Secretary, General Counsel and Director.  Mr.
Kinsolving has been Secretary since May 1994, General Counsel since October 1994
and a director since 1989. He has been Vice President of Asarco since 1983, has
served as Asarco's General Counsel since 1986 and its Secretary from 1987 to
1995. He is also an alternate director of Grupo Mexico, S.A. de C.V.
 
     Brendan M. O'Grady, Comptroller.  Mr. O'Grady was appointed Comptroller in
1992. Previously, Mr. O'Grady served as Assistant Comptroller from 1981 to 1992.
 
     Thomas J. Findley, Jr., Treasurer.  Mr. Findley has been Treasurer since
1996. He is also Treasurer of Asarco and has served in that position since 1991.
 
     Ambassador Everett E. Briggs, Director.  Ambassador Briggs has been a
director since 1996. He has served as President of The Americas Society and the
Council of the Americas since October 1993. Prior to that he served as U.S.
Ambassador to Portugal from 1990 to 1993. During 1989, he was Special Assistant
to the President for National Security Affairs and Senior Director for Latin
America and the Caribbean at the National Security Council. He has also served
as U.S. Ambassador to Honduras and Panama.
 
     Jaime Claro, Director.  Mr. Claro has been a director since September 1996.
He has been President and a director of Cerro Sales Corporation since prior to
1991. Mr. Claro is also Vice Chairman of Cia. Electro Metalurgica S.A. and
Quemchi S.A., Chairman of Chilean Line Inc., a director of Cristalerias de Chile
S.A. and Navarino S.A., and a director of Sud Americana de Vapores, S.A. and a
director of Vina Los Vascos S.A.
 
     Francis R. McAllister, Director.  Mr. McAllister has been a director since
1986 and was Vice President from 1992 to 1993. He has been Executive Vice
President, Copper Operations of Asarco since 1993. Prior to that he was Asarco's
Executive Vice President and Chief Financial Officer from 1992 to 1993. From
1986 to 1992 he served as Vice President, Finance and Administration and Chief
Financial Officer. He has been a director of Asarco since 1988. He is also a
director of Grupo Mexico, S.A. de C.V. and of Cleveland Cliffs Inc.
 
                                       68
<PAGE>   71
 
     John F. McGillicuddy, Director.  Mr. McGillicuddy has been a director since
1996. He is a director of UAL Corporation, USX Corporation, Kelso & Company,
Inc. and Empire Blue Cross and Blue Shield. From December 1991 to December 1993
he was Chairman of the Board and Chief Executive Officer of Chemical Banking
Corporation and Chemical Bank. Prior to that, he was Chairman of the Board and
Chief Executive Officer of Manufacturers Hanover Trust Company from 1979 to
1991.
 
     Robert J. Muth, Director.  Mr. Muth has been a director since 1984. He has
been Vice President, Government and Public Affairs of Asarco since prior to
1991.
 
     Robert M. Novotny, Director.  Mr. Novotny has been a director since 1995.
He has been Vice President, Lead, Zinc, Silver and Mineral Operations of Asarco
since 1993. From 1990 to 1993 he was Vice President, Operations of Asarco.
 
     Robert A. Pritzker, Director.  Mr. Pritzker has been a director since 1983.
He is President and Chief Executive Officer of The Marmon Corporation and has
served in that position for over five years. Mr. Pritzker is also President and
Chief Executive Officer of The Marmon Group, Inc. and holds executive positions
in its more than sixty autonomous member companies. He is a director of Acxiom
Corporation.
 
     Michael O. Varner, Director.  Mr. Varner has been a director since 1995. He
has been Vice President, Environmental Operations of Asarco since October 1993.
Previously, he served as General Manager of Asarco's Western Metals Division
from April 1992 to September 1993 and was Director of Asarco's Technical
Services Center from 1986 to March 1992.
 
     J. Steven Whisler, Director.  Mr. Whisler has been a director since 1995.
He has been Senior Vice President of Phelps Dodge Corporation since 1988 and
President of Phelps Dodge Mining Company since 1991. He is a director of Phelps
Dodge Corporation, UNOCAL Corporation and Burlington Northern Santa Fe
Corporation.
 
     David B. Woodbury, Director.  Mr. Woodbury has been a director since 1996.
He has been Vice President, Human Resources of Asarco since March 1993. From
1984 to March 1993, Mr. Woodbury was Vice President, Human Resources of Ferro
Corporation, a specialty metals producer.
 
     Douglas C. Yearley, Director.  Mr. Yearley has been a director since 1991.
He has been Chairman of the Board and Chief Executive Officer of Phelps Dodge
Corporation since 1991. Mr. Yearley is a director of Lockheed Martin
Corporation, USX Corporation and J.P. Morgan & Co. Incorporated and Morgan
Guaranty Trust Company of New York.
 
     The Company's Board of Directors is composed of 15 members. Two directors
are elected by the holders of Common Stock, voting as a separate class, and 13
directors are elected by the holders of Class A Common Stock, voting as a
separate class, one of whom is the President.
 
     Certain of the Company's officers are also officers of Asarco. They are
compensated by Asarco and receive no compensation from the Company.
 
                                       69
<PAGE>   72
 
                              CERTAIN TRANSACTIONS
 
RELATED PARTY TRANSACTIONS
 
     Asarco provides various support services to the Company. In 1996, these
activities were principally related to legal, tax, accounting and treasury
support services. Asarco is reimbursed for those support services at cost. The
total amount paid by the Company to Asarco in 1996 for such services was $0.8
million for 1996 and $0.3 million for 1995. Additionally, in 1997 the Company
paid Asarco a fee of $500,000 for services of Asarco's senior management in
connection with the arranging of financings for the Company's expansion and
modernization program.
 
     The Class A common stockholders and/or their affiliates purchase copper
products from the Company from time to time at prices determined on an
arm's-length basis by reference to the LME market price for copper at such time.
The Company expects that its policy of determining prices for related party
transactions on an arm's-length basis by reference to the LME market price for
copper at the time of any such transaction will be continued. Sales of copper to
the Class A common stockholders amounted to $71.8 million for 1996 and $85.0
million for 1995, which are more fully described below.
 
     Asarco purchased copper products from SPCC in amounts of $46.5 million in
1996 and $46.1 million in 1995. Richard de J. Osborne, Francis R. McAllister,
Kevin R. Morano, Augustus B. Kinsolving, Robert J. Muth, Robert M. Novotny,
Michael O. Varner and David B. Woodbury are executive officers of Asarco. Each
is a director of the Company.
 
     Cerro Sales, an entity related to Cerro, purchased copper products from the
Company during 1996 in the amount of $14.4 million. Their purchases from the
Company during 1995 amounted to $23.9 million. Robert A. Pritzker is Chairman of
the Board and a director of Cerro Sales and Jaime Claro is a director of Cerro
Sales and its President. Messrs. Pritzker and Claro are directors of the
Company.
 
     Phelps Dodge Refining Corporation, an affiliate of Phelps Dodge and Phelps
Dodge Corporation, purchased copper products from the Company in the amount of
$10.8 million in 1996. In 1995, its purchases amounted to $15.0 million. Douglas
C. Yearley is Chairman of the Board and Chief Executive Officer of Phelps Dodge
Corporation. J. Steven Whisler is Senior Vice President of Phelps Dodge
Corporation. Messrs. Yearley and Whisler are directors of the Company.
 
     During 1996, the Company purchased steel castings and grinding balls at an
aggregate price of approximately $134,000 from Cia. Electro Metalurgica S.A.
("Electro") and a subsidiary company. In addition, the Company contracted an
aggregate of $9.9 million for shipping services to and from Peru by Cia. Sud
Americana de Vapores, S.A. ("CSAV"), a company indirectly controlled by Quemchi,
S.A. ("Quemchi"). Mr. Jaime Claro is Vice Chairman of Electro and Quemchi, and
his direct and indirect family interests in both companies exceed 10%. Mr. Claro
is also a director of CSAV and is Chairman of Chilean Line Inc., which is the
agent for and is owned by CSAV. Mr. Claro is a director of the Company.
 
     The Company believes that the foregoing transactions were entered into on
arm's-length bases on terms as favorable as could be obtained from other third
parties. It is anticipated that in the future the Company will enter into
similar transactions with the same parties.
 
STOCKHOLDERS' AGREEMENT
 
     Each of the Class A common stockholders, in connection with the exchange
offer for labor shares, has entered into the Stockholders' Agreement. The
Stockholders' Agreement provides, among other things, that the Class A common
stockholders elect 12 of the Company's 15 directors and elect the President of
the Company as a thirteenth director. Upon termination of the Stockholders'
Agreement, each share of Class A common stock will automatically convert into
one share of common stock (voting share for share as a single class on all
matters including election of directors), if at any time the number of shares of
Class A common stock owned by the Class A common stockholders (or affiliates of
the Class A common stockholders) shall be less than 35% of the outstanding
shares of Class A common stock and common stock of the Company. In addition, the
rights and obligations of each Class A common stockholder under the
Stockholders' Agreement will terminate in the event such Class A common
stockholder (or its affiliates) shall cease to own shares of Class A common
stock.
 
                                       70
<PAGE>   73
 
                              DESCRIPTION OF NOTES
 
     The New Notes will be issued pursuant to an indenture (the "Original
Indenture") dated as of May 30, 1997 among the Issuer, the Guarantor and
Citibank, N.A., as trustee (the "Trustee"), principal paying agent and registrar
and a Supplemental Indenture thereto pertaining to the Notes dated as of May 30,
1997 among the Issuer, the Guarantor and the Trustee (collectively referred to
herein as the "Indenture"). The Indenture has been filed as an exhibit to the
Registration Statement, of which the Prospectus constitutes a part. The Notes
will be direct obligations of SP Limited and its Branch. Payments of interest
and principal and Additional Amounts, if any, will be made by SP Limited or its
Branch.
 
     The following summary of certain provisions of the Notes, the Guarantee,
the Indenture and the Amended and Restated Collateral Trust Agreement does not
purport to be complete and is qualified in its entirety by reference to the
provisions of the Notes, the Guarantee, the Indenture, the Supplemental
Indenture and the Amended and Restated Collateral Trust Agreement. Wherever
particular sections, articles or defined terms of the Indenture are referred to
herein, such sections, articles or defined terms shall be as specified in the
Indenture. Capitalized terms not otherwise defined below or elsewhere in this
Prospectus shall have the respective meanings given to such terms in the
Indenture. Copies of the Indenture and the Amended and Restated Collateral Trust
Agreement will be available for inspection and copying by the Holders during
normal business hours at the offices of the Trustee. The holders will be bound
by, and will be deemed to have notice of, all the provisions of the Notes, the
Guarantee, the Indenture and the Amended and Restated Collateral Trust
Agreement.
 
     The terms of the New Notes are identical in all material respects to the
terms of the Old Notes, except for certain transfer restrictions and
registration rights relating to the Old Notes and except that, if the Exchange
Offer is not consummated by 180 days following the Issue Date, holders that have
complied with their obligations under the Registration Rights Agreement will be
entitled, subject to certain exceptions, to special interest at a rate per annum
equal to 0.5% of the principal amount of Old Notes held by such holder.
 
GENERAL
 
     The Notes will be limited to $150,000,000 aggregate principal amount and
will mature on May 30, 2007. The Notes are part of the SENs Program established
by SP Limited under the Original Indenture, providing for the issuance of up to
$750 million of SENs in series from time to time. Subsequent series of SENS up
to an additional $600 million principal amount in the aggregate may be offered
but are not being offered pursuant to this Prospectus. The Notes are the direct,
unconditional, unsubordinated general obligations of the Issuer and will be
secured by the pledge and grant of a continuing lien and security interest from
the Issuer to the Collateral Trustee as described under "The Collateral Trust
and Security Agreement" below and from the Issuer to the Trustee, in trust for
the benefit and security of the holders of Notes in the Note Collateral. Payment
of principal and interest on the Notes will be fully and unconditionally
guaranteed by SPCC. SP Limited has also entered into the Credit Facility which
will rank pari passu with the Notes and will also be guaranteed, on a pari passu
basis with the Notes, by SPCC. The Notes will rank pari passu among themselves
and each other series of SENs, without any preference of one over the other by
reason of priority of date of issuance or otherwise. See "-- The Amended and
Restated Collateral Trust Agreement", "-- Guarantee by SPCC" and "Description of
Credit Facility".
 
     Each of the Notes will bear interest at the rate per annum shown on the
cover page of this Prospectus. Interest on the Notes will be calculated on the
basis of a 360-day year consisting of twelve 30-day months and will be payable
monthly, on the 30th day of each month (or the 28th day of February), commencing
June 30, 1997 (each, a "Payment Date") to the persons in whose names such Notes
are registered at the close of business on the 15th day of such month (unless
such day is not a Business Day, in which case the following Business Day).
Principal on the Notes will be payable on each Payment Date, commencing June 30,
2000, as described below. The Notes will have a final maturity of May 30, 2007.
Unless a Retention Trigger Event or Debt Service Retention Event has occurred
and is continuing, the Issuer will make direct payments on the Notes from its
own funds. If a Retention Trigger Event or a Debt Service Retention Event has
occurred and is continuing, payments on the Notes will be made from funds on
deposit in the Note Collateral Account or the Note Reserve Account. Any payment
of principal or interest otherwise required to be made in respect of a Note on a
date that is not a Business Day need not be made on such date, but may be made
on the next succeeding Business Day with the
 
                                       71
<PAGE>   74
 
same force and effect as if made on such date, and no additional interest shall
accrue as a result of such delayed payment.
 
PAYMENTS
 
     Payments of principal, interest and premium, if any, in respect of each
Note will be made by the Trustee or a Paying Agent by Dollar check drawn on a
bank in the United States, and mailed to the holder of such Note at its address
appearing in the Register; provided, that upon application by the holder of a
Note to the Trustee or a Paying Agent not less than 10 days before each Payment
Date, such payment shall be made by wire transfer to a Dollar account maintained
by the payee with a bank in the United States.
 
     Interest shall be payable at a rate of 7.90% per annum on the outstanding
principal amount of the Notes monthly in arrears on each Payment Date. The
principal amount of the Notes will be payable in monthly installments on each
Payment Date commencing June 30, 2000, pursuant to a level debt service schedule
or such earlier date as may be established by acceleration following either an
Accelerated Amortization Event or an Event of Default.
 
     Unless a Retention Trigger Event or a Debt Service Retention Event has
occurred and is continuing, the Issuer will, no later than each Payment Date,
deposit with the Paying Agent a sum (in Dollars) sufficient to pay the principal
(and premium, if any) and interest due on such Payment Date (collectively, the
"Due Amount"), such sum to be held in trust for the benefit of the Persons
entitled to such principal, premium or interest, and (unless such Paying Agent
is the Trustee) the Issuer will promptly notify the Trustee of its action or
failure so to act. If a Retention Trigger Event or a Debt Service Retention
Event has occurred and is continuing, no later than 10:00 a.m. on the third
Business Day prior to each Payment Date, the Trustee will give the Issuer
written notice of the amount on deposit in the Note Collateral Account and the
Issuer will, no later than the Business Day prior to each Payment Date, deposit
in the Note Collateral Account the excess, if any, of the Due Amount for such
Payment Date over the amount on deposit in the Note Collateral Account on the
Business Day prior to each Payment Date, and the Issuer will promptly notify the
Trustee of its action or failure so to act. In the event that the Issuer fails
to make the required payments or there are insufficient funds on deposit in the
Note Collateral Account to make the required payment, amounts on deposit in the
Note Reserve Account will be used to make the payments.
 
     Whenever in this Prospectus there is a reference, in any context, to the
payment of the principal of or interest on, or in respect of, any Note, such
payment shall be deemed to include the payment of Additional Amounts provided
for hereunder to the extent that, in such context, Additional Amounts are, were
or would be payable in respect of such payment pursuant to the provisions
hereunder and express mention of the payment of Additional Amounts (if
applicable) in any provision hereof shall not be construed as excluding
Additional Amounts in those provisions hereof where such express mention is not
made.
 
OPTIONAL REDEMPTIONS
 
     The Issuer may redeem the Notes in whole or in part at any time at a
Redemption Price equal to (i) the outstanding principal amount of the Notes so
redeemed plus (ii) accrued and unpaid interest to the date of redemption plus
(iii) the Make-Whole Premium; provided that the Note Reserve Account (as defined
herein) contains funds in an amount equal to the Required Balance on the date of
such redemption after giving effect to all payments to be made on such date.
Each such redemption must be in a minimum amount of $5,000,000 (or such lesser
amount of the Notes as is then outstanding). Upon any optional redemption of the
Notes by the Issuer, the Issuer or the Trustee shall provide notice to each
holder of the Notes subject to such optional redemption not less than 30 days
nor more than 60 days prior to the scheduled date of such redemption.
 
OPTIONAL REDEMPTIONS FOR TAX REASONS
 
     If at any time, the Issuer or Guarantor is or will become obligated for any
reason to pay (i) any Additional Amounts in excess of those attributed to the
Peruvian Tax of 1% imposed on interest payments to holders of Notes that are not
domiciled in Peru for Peruvian tax purposes ("Excess Additional Amounts") or
(ii) a tax in excess of 1% on payments of interest to holders of Notes that are
not domiciled in Peru for Peruvian tax purposes
 
                                       72
<PAGE>   75
 
directly to the applicable Peruvian taxing authority (an "Interest Tax"; and any
such excess Interest Tax, "Excess Interest Tax"), and such obligation cannot be
avoided by the Issuer or the Guarantor taking reasonable measures available to
it, then, subject to the discussion below, the Notes will be redeemable in whole
(or in part, as provided below), at the option of the Issuer or the Guarantor,
at any time upon not less than 30 days nor more than 60 days' notice given to
the holders in an amount equal to the sum of (i) the principal amount
outstanding at the time, plus (ii) accrued interest to the date of prepayment,
plus (iii) any Additional Amounts. The Issuer or the Guarantor, as the case may
be, will be considered to be obligated to pay such excess Additional Amounts
despite the fact that the Issuer or the Guarantor, as the case may be, could
have, in lieu of withholding from payments of interest and paying Additional
Amounts, paid the tax directly to the applicable Peruvian taxing authority.
 
     In order to effect a redemption of the Notes for tax reasons, the Issuer
shall deliver to the Trustee an opinion of Peruvian outside counsel reasonably
acceptable to the Trustee confirming the tax obligation at least 45 days prior
to redemption. No notice of redemption for tax reasons may be given earlier than
90 days prior to the earliest date on which the Issuer or the Guarantor would be
obligated to pay such Excess Additional Amounts or Excess Interest Tax in
respect of the Notes.
 
     If the holders of two-thirds or more of the aggregate principal amount of
the outstanding Notes waive their rights, if any, to Excess Additional Amounts
payable by the Issuer or the Guarantor, then (i) the Issuer or the Guarantor
shall not be obligated to pay Excess Additional Amounts to any holders of Notes
and (ii) the Issuer or the Guarantor may not redeem the Notes except as
otherwise provided pursuant to the Indenture. In the case of an Excess Interest
Tax, if the holders of two-thirds or more of the aggregate principal amount of
the outstanding Notes agree to receive payments net of Excess Interest Tax, then
(i) payments of interest to all holders will be reduced by the Excess Interest
Tax and (ii) the Issuer or the Guarantor may not redeem the Notes except as
otherwise provided pursuant to the Indenture.
 
     Subject to the following paragraph, the Notes may be redeemed in part at
the option of the Issuer or the Guarantor if the Issuer or the Guarantor would
be obligated to pay Excess Additional Amounts or Excess Interest Tax aggregating
at least $1,000,000 per annum. Except as provided in the following paragraph,
any partial redemption of Notes for tax reasons shall be limited to no more than
the aggregate principal amount of such Notes necessary to be redeemed in order
to reduce the Issuer's or the Guarantor's payment of Additional Amounts or
Interest Tax in respect of Notes to an amount equal to the Additional Amounts,
or Interest Tax, as the case may be, payable with respect to the 1% Peruvian Tax
imposed on interest payments on such Notes (calculated without giving effect to
such partial redemption).
 
     If the Issuer or Guarantor is or will become obligated to pay Excess
Additional Amounts or Excess Interest Tax only with respect to Notes held by a
certain type (or types) of holders (the "Affected Holders"), the Issuer or
Guarantor may not effect a redemption for tax reasons of the Notes held by
holders who are not Affected Holders, but at the option of the Issuer or
Guarantor, the Notes held by Affected Holders may be redeemed for tax reasons.
If the Issuer or the Guarantor, as the case may be, seeks to redeem the Notes
held by any Affected Holders as provided by this paragraph, such Affected
Holders will cooperate with the Issuer or the Guarantor, as the case may be, to
effect such a redemption. Furthermore, if the Notes are held in a global Note,
the Issuer or the Guarantor, as the case may be, may, to the extent necessary,
exchange the Notes for certificated Notes in order to effect a redemption
pursuant to this paragraph, provided that the Issuer or the Guarantor, as the
case may be, will as promptly as practicable subsequently exchange such
certificated Notes for Notes held in a global Note, except for the Notes held by
the Affected Holders.
 
     If any certificated Note is to be redeemed in part as set forth under
"Optional Redemption" or "-- Optional Redemption for Tax Reasons", a new
certificated Note will be issued for surrender of the original Note. Upon
redemption of a portion of any global Note, such global Note will be marked to
reflect the appropriate reduction of its principal amount.
 
   
     The New Notes will be issued in registered form in denominations of US
$250,000 and integral multiples of $1,000 in excess thereof (an "Authorized
Denomination").
    
 
                                       73
<PAGE>   76
 
   
TRANSFER OF NOTES
    
 
   
     Notes may be transferred in whole or in part in an Authorized Denomination
upon the surrender of the Notes to be transferred at the specified office of the
Note Registrar. Transfer of beneficial interest in the Global Notes will be
effected only through records maintained by DTC and its participants. See
" -- Certain Book-Entry Procedures for Global Notes."
    
 
RATINGS
 
     Moody's, Standard & Poor's and Duff & Phelps have assigned the Notes and
the SENs Program the securities ratings of "Baa3", "BBB-" and "BBB-",
respectively. Each such rating reflects only the view of the applicable rating
agency at the time the rating was issued, and any explanation of the
significance of such rating may only be obtained from such rating agency. There
is no assurance that any such credit rating will remain in effect for any given
period of time or that such rating will not be lowered, suspended or withdrawn
entirely by the applicable rating agency, if, in such rating agency's judgment,
circumstances so warrant. Any such lowering, suspension or withdrawal of any
rating may have an adverse effect on the market price or marketability of the
Notes.
 
THE AMENDED AND RESTATED COLLATERAL TRUST AND SECURITY AGREEMENT
 
     In connection with the Program, SP Limited has pledged and granted a
continuing lien and security interest in favor of the Collateral Trustee,
pursuant to the Collateral Trust and Security Agreement between the Issuer and
Deutsche Bank AG, New York Branch, as Collateral Trustee, dated as of May 30,
1997, (the "Amended and Restated Collateral Trust Agreement") in trust for the
security and benefit of the Secured Parties, in the Export Contracts and Export
Receivables arising from future copper sales by SP Limited to customers located
outside of Peru, covering up to a maximum aggregate amount of 320,000 short tons
annually. Collections in respect of Export Receivables will be deposited to the
Collection Account, a New York segregated trust bank account held by the
Collateral Trustee for the benefit of the Secured Parties.
 
     The individual Secured Parties will not have a separate security interest
in any specific Export Contract or Export Receivable but, through the Collateral
Trustee, will have an undivided percentage security interest in the Collateral
as a whole on the terms and conditions of the Amended and Restated Collateral
Trust Agreement, consisting of (i) in the case of the holders of any series of
SENs, a percentage of the Collateral, including the right to receive a
percentage of all Collections, in each case equal to the SENs Total Collateral
Percentage for such series, (ii) in the case of the lenders and the agents for
the Credit Facility, a percentage of the Collateral, including the right to
receive a percentage of the Collections, in each case equal to the Credit
Facility Total Collateral Percentage, and (iii) in the case of any Additional
Secured Obligations, a percentage of the Collateral, including the right to
receive a percentage of Collections, in each case equal to the Designated Total
Collateral Percentage for such Additional Secured Obligations.
 
     Initially, (i) the holders of each series of SENs shall have rights in the
Collateral equal to the SENs Basic Collateral Percentage for such series, (ii)
the lenders shall have rights in the Collateral equal to the Credit Facility
Basic Collateral Percentage, and (iii) the holders of any Additional Secured
Obligations shall have rights in the Collateral equal to the Designated Basic
Collateral Percentage for such Additional Secured Obligations. The Issuer may
designate an additional percentage interest in the Collateral for the benefit of
the holders of any series of SENs, the lenders or the holders of Additional
Secured Obligations, as the case may be; provided that after giving effect to
such designation, the sum of (a) the SENs Total Collateral Percentage, (b) the
Credit Facility Total Collateral Percentage and (c) the aggregate Designated
Total Collateral Percentages for all Additional Secured Obligations shall not
exceed 100%. The Issuer, subject to certain conditions, may eliminate any
Additional Percentages that have been designated as described above.
 
     To the extent that the aggregate percentage interest of all Secured Parties
is less than 100%, the Issuer will be entitled to receive the remaining
percentage of Collections on a daily basis in all circumstances, whether or not
a default or any other event has occurred.
 
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<PAGE>   77
 
  Second Amended and Restated Collateral Trust Agreement
 
   
     The Issuer and the Collateral Trustee have entered into a new Amended and
Restated Collateral Trust Agreement dated as of July 15, 1997 and effective as
of the Expiration Date (the "Second Amended and Restated Collateral Trust
Agreement"), which is identical to the Amended and Restated Collateral Trust
Agreement, except that (i) the Collateral Trustee is directed to transfer funds
on deposit in the Collection Account at 3:00 P.M. on each Business Day rather
than at 9:00 A.M. on each Business Day, (ii) the Collateral Trustee is
authorized to make overnight investments of funds on deposit in the Collection
Account in investments that are authorized under the Indenture and (iii) the
Amended and Restated Collateral Trust Agreement may be amended without the
consent of the holders of the Notes in circumstances which would not require the
consent of the holders of the Notes under the Indenture, so long as the
interests of the holders are not adversely affected in any material respect.
    
 
     By tendering their Old Notes, each holder participating in the Exchange
Offer will be deemed to have consented, under the Registration Rights Agreement
and the Amended and Restated Collateral Trust Agreement, to the changes made in
the Second Amended and Restated Collateral Trust Agreement.
 
  Representations and Warranties
 
     The Issuer represented and warranted to the Collateral Trustee on the date
of the execution of the Amended and Restated Collateral Trust Agreement that (i)
assuming compliance by the Collateral Trustee with the terms thereof, the
Amended and Restated Collateral Trust Agreement creates a valid and binding lien
in favor of the Collateral Trustee in the Collection Account and all cash
deposited therein, prior to all other liens except Permitted Liens (as defined
in the Amended and Restated Collateral Trust Agreement); (ii) the Amended and
Restated Collateral Trust Agreement creates a valid and binding lien and
security interest in favor of the Collateral Trustee in the Export Contracts and
Export Receivables, prior to all other Liens except Permitted Liens (as defined
in the Amended and Restated Collateral Trust Agreement); (iii) each Export
Contract is in full force and effect and constitutes a valid and legally
enforceable obligation of the Issuer, subject to the effects of bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium and other similar
laws relating to or affecting creditors' rights generally, general equitable
principles (whether considered in a proceeding in equity or at law) and an
implied covenant of good faith and fair dealing; and (iv) all obligations of the
Issuer under the Amended and Restated Collateral Trust Agreement are obligations
of the Branch and such obligations, and the security interest created under the
Amended and Restated Collateral Trust Agreement are enforceable against the
Branch, subject to the effects of bankruptcy, insolvency, fraudulent conveyance,
reorganization, moratorium and other similar laws relating to or affecting
creditors' rights generally, general equitable principles (whether considered in
a proceeding in equity or at law) and an implied covenant of good faith and fair
dealing.
 
  Export Receivables and Export Contracts
 
     In connection with the granting of a security interest in the Export
Contracts and the Export Receivables to the Collateral Trustee, SP Limited will
(i) notify in writing each of its Export Customers (as defined in the Amended
and Restated Collateral Trust Agreement) that is a party to a contract in
respect of Export Receivables and (ii) authorize and direct in writing each such
customer to pay all amounts owed by it under or in respect of the Export
Receivables directly into the Collection Account. SP Limited will request each
Export Customer party to an Export Contract to execute an Acknowledgment to pay
in accordance with such notice. SP Limited has filed UCC-1 financing statements
with respect to the Collateral.
 
  Excluded Receivables
 
   
     Excluded from the lien and security interest granted by the Issuer in the
Amended and Restated Collateral Trust Agreement are specified export contracts
(Excluded Export Contracts) covering up to 40,000 tons annually which may secure
other debt arrangements of the Issuer. The Issuer may exclude, on an annual
basis, additional export contracts providing for sales of copper up to an
aggregate annual amount (expressed in short tons) equal to the sum of (I) 10% of
Net Certified Export Sales (as defined below) and (II) the Excess Certified
Export Sales (as defined below) if any, in each case for such calendar year;
provided that the maximum amount of copper to be
    
 
                                       75
<PAGE>   78
 
sold under contracts which may be so excluded after the commencement of a
calendar year shall be reduced by a fraction, the numerator of which is the
number of days elapsed since the beginning of such calendar year and the
denominator of which is 365; and provided further that the Issuer shall not be
permitted to exclude contracts pursuant to clause (x) above in an amount that
would cause the Program Amount to be reduced (as described in the following
paragraph) below an amount equal to the sum of (i) the Outstanding Principal
Amount at such time and (ii) the product of (a) the Designated Total Collateral
Percentage for Additional Secured Obligations then outstanding times (b) the
Program Amount then in effect. The "Net Certified Export Sales", for any
calendar year, is equal to (A) the lesser of (i) 320,000 short tons and (ii) the
budgeted level of sales of copper by the Issuer to be sold to customers located
outside of Peru, as certified by the Issuer (the "Certified Export Sales") for
such calendar year minus (B) the aggregate annual amount of short tons of copper
to be sold under Excluded Export Contracts. "Excess Certified Export Sales"
means the excess, if any, of the Certified Export Sales for such calendar year
over the sum of (i) 320,000 short tons and (2) the annual amount of short tons
of copper in respect of Excluded Export Contracts for such calendar year.
 
     If the Issuer identifies additional Excluded Export Contracts as described
above in clause I, the Program Amount shall be reduced, during the period in
which such contracts are so excluded, by an amount equal to the product of (x)
the Program Amount prior to such reduction and (y) a fraction, the numerator of
which is equal to the annual amount of copper sales arising under such Excluded
Export Contracts (expressed in short tons) and the denominator of which is equal
to the Net Certified Export Sales.
 
  Export Sales
 
     On or prior to January 15 of each calendar year, the Issuer shall deliver
to the Collateral Trustee and the Trustee a certificate of a responsible officer
(the "Annual Sales Certificate") certifying for such calendar year (i) the
budgeted amount of short tons of copper to be sold to customers located within
Peru (which shall not include sales effected through any Peruvian Governmental
Authority to customers located outside Peru) ("Domestic Sales"), (ii) the
Certified Export Sales for such year and (iii) the aggregate budgeted amount of
short tons of copper to be sold pursuant to Excluded Export Contracts (the sum
of clauses (i), (ii) and (iii) (the "Total Sales"). If, in any calendar year
when the Certified Export Sales are less than 320,000 short tons, the ratio of
Domestic Sales to Total Sales, expressed as a percentage (the "Domestic
Percentage") exceeds 20% (such percentage, to the extent exceeding 20%, shall
hereinafter be referred to as the "Excess Domestic Percentage"), then the
Program Amount in effect for such year shall be reduced for such year by an
amount equal to the product of the Excess Domestic Percentage and the Program
Amount which would otherwise have been in effect on the first day of such year
(after giving effect to the application of Section 2.02 of the Amended and
Restated Collateral Trust Agreement). If during any calendar year the Issuer
becomes aware that the Domestic Percentage will be increased as a result of an
increase in Domestic Sales in excess of the budgeted amount set forth on the
Annual Sales Certificate previously delivered for such calendar year (calculated
on a pro rata basis for the portion of the calendar year remaining) and the
Domestic Percentage will, as a result thereof, exceed 20% (or increase further
above 20%), then, within five Business Days of becoming so aware, the Issuer
shall deliver to the Collateral Trustee a certificate of a responsible officer
in replacement for the Annual Sales Certificate previously delivered and the
Program Amount shall be recalculated as set forth in the preceding sentence on a
pro rata basis for the remainder of the calendar year; provided, however, that
for purposes of this sentence the increase in Domestic Sales shall be deemed to
equal the amount by which the increase in the Domestic Sales exceeds the
increase, if any, in the amount of the Total Sales, each as set forth in the
Annual Sales Certificate previously delivered for such calendar year.
 
  Collection Account
 
     As described above, all Collections on the Export Receivables will be
deposited on a daily basis in the Collection Account. On a daily basis, the
Collateral Trustee will allocate the Collections in accordance with the
applicable total collateral percentage to (i) the SENs Collateral Account for
each series of SENs, (ii) the Credit Facility Collateral Account, (iii) to such
accounts, if any, established in connection with any Additional Secured
Obligations, and (iv) to accounts designated by the Issuer in each case in
accordance with such party's respective interests in the Collections on that
day. Without the consent of the other Secured Parties, the Issuer may designate
 
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<PAGE>   79
 
a percentage in the Collateral to secure any Additional Secured Obligations,
provided, however that after giving effect to such designation, the sum of (a)
the SENs Total Collateral Percentage, (b) the Credit Facility Total Collateral
Percentage and (c) the aggregate Designated Total Collateral Percentages of all
Additional Secured Obligations shall not exceed 100%.
 
  Remedies Subject to Intercreditor Arrangements
 
     No Realization Event with respect to the Collateral (as defined in the
Amended and Restated Collateral Trust Agreement) or the direction of Collections
to any account other than the Collection Account may be effected by the
Collateral Trustee or by or on behalf of any Secured Party except in accordance
with the intercreditor arrangements set forth in the Amended and Restated
Collateral Trust Agreement. The Required Secured Parties shall not effect any
Realization Event with respect to the Collateral or direct the Collections to an
account other than the Collection Account unless (a) any Senior Secured
Obligations shall have been declared due and payable prior to the stated
maturity thereof in accordance with the related agreement (an "Acceleration
Event") or (b) there shall have occurred and be continuing an event of default
with respect to a Senior Secured Obligation resulting from (i) a failure to make
a payment of principal or interest and such event of default shall remain
unremedied for a period of at least 5 days (a "Payment Event of Default") or
(ii) a bankruptcy proceeding or similar event shall be commenced by or against
the Issuer, the Guarantor or the Branch (a "Bankruptcy Event of Default").
 
  Subordination
 
     Pursuant to the Amended and Restated Collateral Trust Agreement, the Issuer
may grant a subordinated interest in the Collateral for the benefit of certain
parties providing credit enhancement in connection with the Senior Secured
Obligations. So long as any Senior Secured Obligations have not been paid in
full, no Subordinated Creditor (as defined in the Amended and Restated
Collateral Trust Agreement) will exercise any remedies with respect to the
Collateral, institute any foreclosure proceedings or object to any foreclosure
action brought by any holder of Senior Secured Obligations. The holders of the
Senior Secured Obligations have the rights to exercise rights and remedies with
respect to the Collateral in accordance with the Amended and Restated Collateral
Trust Agreements.
 
THE INDENTURE
 
  Accounts
 
     Note Collateral Account.  Concurrently with the execution and delivery of
the Indenture, the Trustee shall establish the Note Collateral Account, a
segregated trust account denominated in Dollars, created and maintained by the
Trustee and entitled the "Citibank, N.A. Southern Peru Limited Note Collateral
Trust Account" into which monies will be deposited and from which monies will be
withdrawn as provided in the Indenture and the Amended and Restated Collateral
Trust Agreement. As described above, on each Business Day, the Collateral
Trustee will transfer a percentage of the funds on deposit in the Collection
Account equal to the Note Total Collateral Percentage to the Note Collateral
Account.
 
     On each Business Day the Trustee will apply the funds deposited in the Note
Collateral Account in the following order of priority:
 
          first, an amount equal to the fees and expenses of the Trustee payable
     under the Indenture which are due and owing on such Business Day shall be
     paid to the Trustee;
 
          second, if the amount on deposit on such Business Day in the Note
     Reserve Account (after giving effect to all transfers to be made on such
     day) is less than an amount equal to the aggregate Scheduled Debt Service
     for the Notes with respect to the three next succeeding Payment Dates (the
     "Required Balance"), an amount equal to the amount necessary to cause the
     amount on deposit in the Note Reserve Account to equal the Required
     Balance; and
 
          third, (i) so long as no Retention Trigger Event or Debt Service
     Retention Event has occurred and is continuing, the remainder of such funds
     will be transferred to the Issuer; or (ii) if a Retention Trigger Event
 
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<PAGE>   80
 
     or Debt Service Retention Event has occurred and is continuing, an amount
     equal to the amount of such funds as is necessary to cause the amount on
     deposit in the Note Collateral Account to equal the past due interest and
     principal on the Notes and interest and principal due on the Notes on the
     immediately succeeding Payment Date shall remain on deposit in the Note
     Collateral Account until applied in accordance with the third paragraph of
     "Payments" above; and the remainder of such funds in the Note Collateral
     Account, if any (the "Excess Collections"), shall be transferred to the
     Issuer so long as a Trigger Event requiring the Trustee to block Excess
     Collections or an Event of Default which results in the acceleration of the
     maturity of the Notes shall not have occurred.
 
     If at 11:00 a.m. (New York City time) on a Payment Date, the Note
Collateral Account does not have on deposit or the Paying Agent has not received
from the Issuer immediately available funds in Dollars sufficient to make the
payments required to be made on such Payment Date, the Trustee shall transfer
from the Note Reserve Account (or make a draw under a Qualified Letter of
Credit) to the Note Collateral Account or the Paying Agent on such Payment Date
immediately available funds in Dollars in an amount which, when added to the
amounts of immediately available funds in Dollars held in the Note Collateral
Account or held by such Paying Agent, will be sufficient to enable the Trustee
or the Paying Agent to make such required payments on such Payment Date. If any
amounts are transferred from the Note Reserve Account pursuant to the
immediately preceding sentence, the Issuer shall, no later than the next
Business Day after receipt of notice from the Trustee that such amounts were
transferred, deposit immediately available funds in Dollars in the Note Reserve
Account in an amount sufficient to cause the amount on deposit in the Note
Reserve Account at such time to be equal to the Required Balance at such time.
 
     During the occurrence and continuance of a Retention Trigger Event, an
Accelerated Amortization Event or a Debt Service Retention Event, on each
Payment Date the Trustee will apply the amounts credited to the Note Collateral
Account in the following order of priority:
 
          first, to the payment of interest on the Notes which is past due;
 
          second, to the payment of scheduled payments of interest on the Notes
     then due and payable;
 
          third, to the payment of any principal of the Notes which is then past
     due;
 
          fourth, to the payment of scheduled payments of principal of the Notes
     then due and payable; and
 
          fifth to the payment of the amount of principal of the Notes, if any,
     required to be prepaid pursuant to the provisions described in "Accelerated
     Amortization Event; Application of Funds" together with any Make-Whole
     Premium due on the amount of such prepayment.
 
     Note Reserve Account.  Concurrently with the execution and delivery of the
Supplemental Indenture, the Trustee shall establish a segregated note reserve
trust account denominated in Dollars (the "Note Reserve Account") into which
monies will be deposited and from which monies will be withdrawn as provided
herein and in the Indenture.
 
     In the event that on any Payment Date there are insufficient funds to make
the scheduled principal and interest payment for any reason, the Trustee will
use funds in the Note Reserve Account to make up such payment. The Note Reserve
Account will be funded initially by the Issuer at the time of the closing of the
offering of the Old Notes in an amount equal to $2,962,500 (the "Initial
Deposit"). The Note Reserve Account will thereafter be funded with (i) amounts
to be transferred from the Note Collateral Account pursuant to clause (ii) under
the second paragraph of " -- Note Collateral Account" and (ii) amounts
transferred to the Trustee from the Issuer specifically for deposit into the
Note Reserve Account so that funds on deposit in the Note Reserve Account will
be at least equal to the Required Balance. The Trustee shall transfer funds from
the Note Reserve Account to the Note Collateral Account as provided under the
third paragraph of " -- Note Collateral Account".
 
     Upon the Notes becoming or being declared due and payable, all amounts on
deposit in the Note Reserve Account shall be applied in accordance with the
provisions described under "Events of Default".
 
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<PAGE>   81
 
     The Issuer may deliver, or cause to be delivered, to the Trustee a
Qualified Letter of Credit in satisfaction of its obligations to fund the Note
Reserve Account and the amount available to be drawn under such letter of credit
shall be deemed to constitute funds on deposit in Note Reserve Account.
 
  Statements; Investment of Funds
 
     On or before the tenth day of each calendar month the Trustee shall provide
the Issuer with a written statement of the balances in, amount deposited in and
application of amounts withdrawn from the Note Collateral Account and the Note
Reserve Account at the end of the immediately preceding calendar month. To the
extent not applied, funds remaining on deposit in the Note Collateral Account or
the Note Reserve Account shall be invested by the Trustee, as specified in
investment instructions given by the Issuer in Eligible Investments, provided
that after the occurrence and during the continuance of a Trigger Event or an
Event of Default, such investments shall be invested by the Trustee in Eligible
Investments selected by the Trustee. All investments of amounts on deposit in
the Note Collateral Account shall mature on the next Payment Date for the Notes
and all amounts invested in the Note Reserve Account shall have maturities such
that an amount at least equal to the Scheduled Debt Service due on the next
Payment Date for the Notes shall mature on such Payment Date.
 
  Payments of Additional Amounts
 
     All payments in respect of the Notes, including, without limitation,
payments of principal, interest, and premium, if any, shall be made by the
Issuer without withholding or deduction for or on account of any present or
future taxes, duties, levies, or other governmental charges of whatever nature
(collectively "Taxes") now or hereafter imposed or established by or on behalf
of Peru or any political subdivision thereof or taxing authority therein (any
such tax, a "Peruvian Tax"), unless the Issuer is required to withhold or deduct
a Peruvian Tax by law (or, if the Issuer may by law elect to withhold or deduct
a Peruvian Tax or to pay such Peruvian Tax directly, the Issuer has elected to
withhold such Peruvian Tax). In the event any Peruvian Taxes are so imposed or
established, the Issuer shall pay such Additional Amounts as may be necessary in
order that the net amounts receivable by the holders after any withholding or
deduction in respect of such Peruvian Tax shall equal the respective amounts of
principal, interest and premium, if any, which would have been receivable in
respect of the Notes in the absence of such withholding or deduction; provided,
however, that no such Additional Amounts shall be payable (i) to, or on behalf
of, a holder who is not (a) a corporation, partnership or trust organized under
the laws of the United States or a State thereof or (b) a corporation or other
entity organized or established under the laws of any other jurisdiction outside
Peru, (ii) to, or on behalf of, a holder for or on account of any such Peruvian
Taxes that have been imposed by reason of the holder (or a fiduciary or settlor
of, or possessor of a power over, such holder, if such holder is an estate or a
trust), having some present or former connection with Peru, any political
subdivision of Peru or any territory or possession of Peru or area subject to
its jurisdiction other than the mere holding or owning of such Note or the
receipt of principal or interest or premium, if any, in respect thereof,
including, without limitation, such holder (or such fiduciary, settlor or
possessor of power over) being or having been a citizen or resident thereof, or
being or having been present therein, or being or having been engaged in trade
or business therein, or having had a permanent establishment therein, (iii) to,
or on behalf of, a holder for or on account of any such Peruvian Taxes that
would not have been imposed but for the presentation by the holder of a Note for
payment (where presentation is required) on a date more than 30 days after the
date on which such payment became due and payable or the date on which payment
thereof is duly provided for, whichever occurs later, except to the extent that
the holder would have been entitled to such Additional Amounts on presenting
such Note for payment on the last date of such period of 30 days, (iv) with
respect to any estate, inheritance, gift, sales, transfer, asset or personal
property tax or any similar tax, assessment or governmental charge, (v) to, or
on behalf of, a holder for or on account of any such Peruvian Taxes which are
actually paid otherwise than by withholding or deduction from payments on or in
respect of any Note, (vi) to, or on behalf of, a holder of any Note to the
extent that such holder is liable for such Peruvian Taxes that would not have
been imposed but for the failure of such holder to comply with any
certification, identification, information, documentation or other reporting
requirements if (a) such compliance is required by Peruvian law, regulation or
administrative practice or any applicable treaty as a precondition to relief or
exemption from, or reduction in the rate of, deduction or withholding of, such
Peruvian Taxes, (b) at least 30 days prior to the first Payment Date with
respect to which such requirements shall apply, the Issuer notifies or causes
the Paying Agent to notify all holders of the Notes or
 
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<PAGE>   82
 
their nominees that such holders will be required to comply with such
requirements and (c) such requirements are not materially more onerous to such
holders (in form, in procedure or in the substance of information disclosed)
than comparable information or other reporting requirements imposed under United
States tax law, regulation and administrative practice (such as IRS Forms 1001,
W-8 and W-9), (vii) to, or on behalf of, a holder for or on account of any such
Peruvian Taxes imposed because the holder is a significant stockholder of the
Issuer or the Guarantor, or (viii) with respect to any combination of items (i),
(ii), (iii), (iv), (v), (vi) and (vii) above. Furthermore, no Additional Amounts
shall be paid with respect to any payment on a Note to a holder that is a
fiduciary or partnership or other than the sole beneficial owner of such payment
to the extent that a beneficiary or settlor with respect to such fiduciary or a
member of such partnership or beneficial owner would not have been entitled to
receive the Additional Amounts had such beneficiary, settlor, member or
beneficial owner been the holder.
 
     If the holders of two-thirds or more of the aggregate principal amount of
the outstanding Notes waive their rights to Additional Amounts or agree to
receive payments net of Interest Tax payable by the Issuer or the Guarantor at a
rate exceeding 1% then (i) the Issuer shall not be obligated to pay excess
Additional Amounts, or payments of interest to holders will be reduced by the
excess Interest Tax and (ii) the Issuer may not redeem the Notes except as
otherwise provided in the Indenture. See "-- Optional Redemptions for Tax
Reasons" and "Taxation -- Peruvian Taxation".
 
  Guarantee by SPCC
 
     The Guarantor will unconditionally guarantee the due and punctual payment
of the principal of (and premium, if any) and interest on the Notes including
all Additional Amounts payable, when and as the same shall become due and
payable, whether at maturity, upon redemption, by declaration of acceleration or
otherwise. Holders of Notes need not exhaust their recourse against the Issuer
prior to proceeding against the Guarantor. The Guarantee will be a direct senior
obligation of the Guarantor which will rank pari passu with the guarantee by
SPCC of borrowings under the Credit Facility.
 
  Covenants
 
     Under the terms of the Notes, the Issuer and/or the Guarantor, as the case
may be, will covenant and agree that as long as any of the Notes remain
outstanding:
 
     Payment of Principal and Interest.  The Issuer will duly and punctually pay
the principal of, interest and Additional Amounts, if any, and premium, if any,
on the Notes in accordance with the terms of the Notes and the Indenture.
 
     Maintenance of Office or Agency.  The Issuer will maintain in the Borough
of Manhattan, New York City, an office or agency where Notes may be presented or
surrendered for payment, where Notes may be surrendered for registration of
transfer or exchange and where notices and demands to or upon the Issuer in
respect of the Notes and the Indenture may be served.
 
     Consolidated Tangible Net Worth.  The Guarantor shall not permit or cause
its Consolidated Tangible Net Worth at any time to be less than US$750,000,000.
 
     Capitalization Ratio.  The Guarantor shall not permit or cause its
Capitalization Ratio at any time to be greater than 0.50 to 1.00.
 
     Compliance with Laws and PAMA.  Each of the Issuer and the Guarantor shall
comply with all requirements of law (other than Environmental Laws, as defined
in the Indenture) except where (i) the failure to comply therewith would not
result in a Material Adverse Effect or (ii) the need to comply is being
contested in good faith by appropriate proceedings.
 
     Each of the Issuer and the Guarantor shall comply with all applicable
Environmental Laws and obtain and comply with and maintain any and all licenses,
authorizations, approvals, notifications, registrations or permits required by
applicable environmental laws, except where (i) the failure to do so would not
result in a Material Adverse Effect or (ii) the need to comply therewith is
being contested in good faith by appropriate proceedings.
 
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<PAGE>   83
 
     Conduct of Business and Maintenance of Existence.  Each of the Issuer and
the Guarantor shall continue to engage in business of the same general type as
now conducted by it and preserve, renew and keep in full force and effect its
corporate existence and maintain all material rights, privileges, concessions
and franchises necessary or desirable in the normal conduct of its business
except as otherwise permitted pursuant to the covenants described under
" -- Merger, Consolidation, etc." and as set forth in the Indenture and except
to the extent that the failure to maintain any such rights, privileges,
concessions and franchises would not, individually or in the aggregate, result
in a Material Adverse Effect.
 
     Maintenance of Property; Insurance.  Each of the Issuer and the Guarantor
shall keep all material property necessary for the conduct of its business in
good working order and condition (ordinary wear and tear excepted); shall
maintain such insurance with respect to its general business and properties with
financially sound and reputable insurance companies (including captive or
affiliated insurance companies) or, to the extent consistent with prudent
business practice, through programs of self insurance, as the Issuer and the
Guarantor shall determine to be adequate (taking into account both the
commercial availability and cost of such insurance); and shall furnish to the
Trustee, upon written request, full information as to the insurance carried.
 
     Limitation on Certain Sales of Assets.  Neither the Issuer nor the
Guarantor shall convey, sell, lease, assign, transfer or otherwise dispose of
(a) any Principal Property to any party (other than to the Guarantor or the
Issuer, as the case may be, provided that no Principal Property may be conveyed,
sold, assigned, transferred or otherwise disposed of to the Guarantor, unless
the Guarantor shall have executed and delivered such amendments and supplements
to the Transaction Documents and such other agreements and documents as the
Trustee may reasonably require in connection with the assumption by the
Guarantor of all or a portion of the obligations of the Issuer (including in
respect of Liens on any Export Receivables generated by the operation of such
Principal Property) under the Indenture and the other Transaction Documents with
respect to such Principal Property (all such amendments, supplements and other
agreements and documents to be in form and substance satisfactory to the
Trustee)), if such asset disposition would have a Material Adverse Effect or (b)
except as otherwise permitted under the Amended and Restated Collateral Trust
Agreement, any Export Receivables.
 
     Merger, Consolidation, etc. Neither the Issuer nor the Guarantor shall
enter into any merger, consolidation or amalgamation, or liquidate, wind up or
dissolve itself (or suffer any liquidation or dissolution), or convey, sell,
lease, assign, transfer or otherwise dispose of, all or substantially all of its
property, business or assets (including, in the case of the Guarantor, the
capital stock of the Issuer) except that (a) so long as no Default, Potential
Trigger Event, Trigger Event or Event of Default would result therefrom, the
Guarantor and the Issuer may merge, consolidate or amalgamate with or into each
other, provided that, if the Guarantor is the surviving entity in such merger
consolidation or amalgamation, the Guarantor shall have complied with the
applicable requirements of clause (b)(ii) below, and (b) the Guarantor or the
Issuer may merge, consolidate or amalgamate with another Person if (i) no
Default, Potential Trigger Event, Trigger Event or Event of Default shall have
then occurred and be continuing or would result therefrom, (ii) the Guarantor or
the Issuer, as the case may be, is the surviving entity in such consolidation or
merger, or, if such other Person is the surviving entity in such consolidation
or merger, such other Person (the "Successor Corporation") shall (A) be
organized under the laws of the United States of America or any State thereof
and shall expressly assume by a supplemental indenture satisfactory in form to
the Trustee executed and delivered to the Trustee by the Successor Corporation
the due and punctual payment of the principal of, premium, if any, and interest
and Additional Amounts, if any, on all of the SENs according to their terms,
and, in the case of a Successor Corporation to the Issuer, the due and punctual
performance of all of the covenants and obligations of the Issuer under the SENs
and the Indenture, and in the case of a Successor Corporation to the Guarantor,
the due and punctual performance of all of the covenants and obligations of the
Guarantor under the Guarantees and the Indenture and (B) the Successor
Corporation, if any, succeeds to and becomes substituted for the Issuer or the
Guarantor, as the case may be, with the same effect as if it had been named in
the SENs as the Issuer or in the Guarantees as the Guarantor and (iii) the
Trustee shall have received a certificate of a responsible officer of the
Guarantor or the Issuer, as the case may be, to the effect that each of the
conditions set forth in clauses (i) and (ii) above have been satisfied.
 
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<PAGE>   84
 
     Liens
 
     (i) Neither the Issuer nor the Guarantor shall create, incur, assume, or
permit to exist any Liens on any Principal Property, except for Permitted Liens.
 
     (ii) Neither the Issuer nor the Guarantor shall create, incur, assume or
permit to exist any Liens on the Export Receivables, other than Liens in favor
of the Collateral Trustee pursuant to the Amended and Restated Collateral Trust
Agreement and Liens of the type set forth in clauses (iii), (viii) and (ix) of
the definition of "Permitted Liens".
 
     (iii) Neither the Issuer nor the Guarantor shall create, incur, assume or
permit to exist any Liens on its copper inventory, other than (a) liens securing
working capital financings or similar obligations (provided that the aggregate
principal amount of Debt secured by such Lien shall not exceed $100 million) and
(b) Liens of the type set forth in clauses (iii), (viii) and (ix) of the
definition of "Permitted Liens".
 
     Maintenance of Books and Records.  The Guarantor shall maintain books,
accounts and records in accordance with U.S. GAAP and the applicable rules and
regulations of the Commission.
 
     Designation and Termination of Designation of Additional Percentages under
the Amended and Restated Collateral Trust Agreement.  At any time after the
occurrence and during the continuation of a Trigger Event, Default or Event of
Default with respect to the Notes, the Issuer shall not designate any Additional
Percentage for the benefit of any Secured Parties (other than for the Notes)
unless the Issuer shall designate a ratable (calculated on the basis of the
Basic Collateral Percentages of the Secured Parties) Additional Percentage for
the benefit of the Notes pursuant to such Section. See " -- The Collateral Trust
and Security Agreement".
 
     If the Issuer shall designate any Additional Percentage for the benefit of
the Notes, the Issuer shall not notify the Collateral Trustee that such
Additional Percentage shall no longer be designated for the benefit of the Notes
unless (a) at least five Business Days prior to the delivery of such notice, the
Issuer shall have delivered a certificate of a responsible officer to the
Trustee and the Collateral Trustee demonstrating that, as of the last day of the
immediately preceding month, the ratio of (x) aggregate Collections transferred
to the Note Collateral Account during the three month period ending on such day
to (y) the sum of all scheduled payments of principal of, and interest
(including Additional Amounts) on, the Notes for such three month period
(calculated after giving effect to the removal of such additional percentage)
would have been at least 3.00 to 1.00, and such a certificate of a responsible
officer shall include a certification of such calculations and (b) no Event of
Default shall have then occurred and be continuing.
 
  Limitation on Additional Debt Secured by Export Receivables
 
     Neither the Issuer nor the Guarantor shall issue any Debt secured by Export
Receivables which would cause the aggregate outstanding principal amount of Debt
issued after the Issue Date secured by Export Receivables to exceed $750 million
(not including the aggregate principal amount of Debt secured by Export
Receivables arising under Export Contracts covering an aggregate annual amount
up to 10,000 short tons of copper) unless prior to the issuance of such Debt
each of the rating agencies then rating the Notes confirms that such issuance
shall not cause a downgrading in their respective then current ratings of the
Notes.
 
  Reports; Notices
 
     The Issuer and the Guarantor will provide the following documents to the
Trustee:
 
          (1) within 30 days after the Issuer and the Guarantor are required to
     file the same with the Commission, copies of the annual reports and other
     information pursuant to Section 13 or Section 15(d) of the Exchange Act;
     or, if the Issuer and the Guarantor are not required to file information
     pursuant to either of such Sections, then they shall file with the Trustee
     and the Commission, in accordance with rules and regulations prescribed
     from time to time by the Commission, such of the supplementary and periodic
     information, documents and reports which may be required pursuant to
     Section 13 of the Securities Exchange Act of 1934 in respect of a security
     listed and registered on a national securities exchange as may be
     prescribed from time to time in such rules and regulations (whether or not
     the Notes are so listed);
 
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<PAGE>   85
 
          (2) any additional information, documents and reports with respect to
     compliance by the Issuer and the Guarantor with the conditions and
     covenants of the Indenture as may be required from time to time by the
     rules and regulations of the Commission, but only to the extent the same
     are not satisfied by delivery of the certificate required by clause (5)
     below;
 
          (3) any summaries of any information, documents and reports, if any,
     required to be filed by the Issuer and the Guarantor pursuant to paragraphs
     (1) and (2) above as may be required by rules and regulations prescribed
     from time to time by the Commission and the Issuer and the Guarantor will
     transmit or cause the Trustee to transmit such summaries to the holders;
 
          (4) written notice of the occurrence of any Trigger Event, Accelerated
     Amortization Event or Event of Default or any event which after notice or
     lapse of time or both would become a Trigger Event, Accelerated
     Amortization Event or Event of Default and a description of the nature and
     period of existence thereof and the action, if any, the Issuer is taking or
     proposes to take with respect thereto within five Business Days of a
     Responsible Officer of the Issuer becoming aware of any such event; and
 
          (5) concurrently with the delivery of quarterly and annual financial
     statements referred to in (1) above, a certificate of a responsible officer
     of the Guarantor (i) stating that, to the best of such responsible
     officers' knowledge, during such period (A) neither the Guarantor nor the
     Issuer has changed its name, its principal place of business or its chief
     executive office without complying with the requirements of this Indenture
     and the Transaction Documents with respect thereto and (B) no Default,
     Potential Trigger Event, Trigger Event or Event of Default has occurred
     which is then continuing except as specified in such certificate and (ii)
     setting forth in reasonable detail the calculations required to determine
     compliance with the financial covenants described above under
     " -- Consolidated Tangible Net Worth" and " -- Capitalization Ratio".
 
     Immediately after (and in no event later than 90 days after) the Trustee
obtains actual knowledge of the occurrence of any Potential Trigger Event,
Trigger Event, Accelerated Amortization Event or Default with respect to the
Notes, the Trustee will transmit notice of such event to the holders of the
Notes; provided, however, that except in the case of a default in the payment of
principal, interest or Additional Amounts on the Notes, the Trustee may withhold
giving such notice if it is in the interest of the holders. Immediately upon
receipt of notice (and no later than 15 days after such receipt of notice) of a
Trigger Event (other than a Trigger Event which becomes a Blocking Event without
any action by the holders) the Trustee shall either call a meeting of the
holders or solicit votes of the holders for purposes of deciding whether the
Trustee will retain Blocked Collections as described under "-- Trigger Events"
below; provided that the Issuer may call such a meeting or solicit votes on its
own in the time period set forth above.
 
  Trigger Events
 
     Each of the following events will be trigger events pursuant to the
Indenture ("Trigger Events"):
 
          (i) as of the last day of any month falling at least three months
     after the Issue Date for the Old Notes, the ratio (the "Three Month Ratio")
     of (x) aggregate Collections transferred to the Note Collateral Account
     during the three calendar months ending on such date to (y) the sum of all
     scheduled payments of principal of, and interest (including Additional
     Amounts) on, such Notes for the three calendar months ending on such date
     shall be less than the Three Month Debt Service Coverage Ratio;
 
          (ii) as of the last day of any month falling at least six months after
     the Issue Date for the Old Notes, the ratio (the "Six Month Ratio") of (x)
     aggregate Collections transferred to the Note Collateral Account during the
     six calendar months ending on such date to (y) the sum of all scheduled
     payments of principal of, and interest (including Additional Amounts) on,
     such Notes for the six calendar months ending on such date shall be less
     than the applicable Six Month Debt Service Coverage Ratio;
 
          (iii) an Event of Default described in clauses (i) or (xi) of "Events
     of Default" shall have occurred and be continuing;
 
          (iv) the Guarantor shall fail to comply with the financial covenants
     described under " -- Consolidated Tangible Net Worth" and
     " -- Capitalization Ratio";
 
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<PAGE>   86
 
          (v) the Guarantor or the Issuer shall fail to comply with the
     covenants described under " -- Limitation on Certain Sales of Assets" and
     " -- Merger, Consolidation, etc.";
 
          (vi) the Guarantor or the Issuer shall fail to comply with the
     covenant described under "Covenants -- Liens" and such failure shall
     continue unremedied (a) for a period of 10 days, if the Issuer or the
     Guarantor shall create, incur or assume any Lien in violation of such
     covenant, or (b) for a period of 45 days, if the Issuer or the Guarantor
     shall permit to exist any Liens in violation of such covenant, in each case
     after the earlier of (x) the date a Company Notice shall have been given or
     (y) the date a responsible officer of the Issuer shall have acquired actual
     knowledge of such failure;
 
          (vii) any Event of Default described under clause (viii) of "Events of
     Default" shall have occurred and be continuing;
 
          (viii) the Collateral Trustee ceases for any reason to have a
     perfected first priority security interest in the Collateral, other than
     Liens of the type set forth in clauses (iii), (viii) and (ix) of the
     definition of "Permitted Liens", or the Trustee ceases for any reason to
     have a perfected first priority security interest in the Note Collateral,
     other than Liens in favor of the Collateral Trustee pursuant to the Amended
     and Restated Collateral Trust Agreement and Liens of the type set forth in
     clauses (iii), (viii) and (ix) of the definition of "Permitted Liens", and
     any such cessation is not cured, or Adequate Substitute Collateral (as
     described below) is not provided, within 5 days after the earlier of (x)
     the date a Company Notice shall have been given or (y) the date a
     responsible officer of the Issuer shall have acquired actual knowledge of
     such default; the requirement to provide "Adequate Substitute Collateral"
     shall be deemed satisfied if (i) the Issuer designates, in accordance with
     Section 2.04 of the Amended and Restated Collateral Trust Agreement, an
     Additional Percentage interest in the Export Receivables for the benefit of
     the Notes (thereby increasing the Note Total Collateral Percentage) equal
     to such percentage as may be necessary to ensure that the Notes will
     maintain the same interest (on a contracted tonnage basis) in the Export
     Receivables (calculated without including the Export Receivables as to
     which priority or perfection has ceased) as Notes would have had but for
     the cessation of perfection or priority or (ii) the Issuer shall provide
     such other additional collateral to the holders as may be in an amount and
     form satisfactory to holders of 51% or more of the aggregate principal
     amount of the outstanding Notes;
 
          (ix) an Event of Default described in clause (x) of "Events of
     Default" shall have occurred and be continuing;
 
          (x) On any date the Collateral Trustee shall fail to have received
     fully executed Acknowledgments from the Issuer's customers party to Export
     Contracts representing customers obligated to purchase at least 80% of the
     aggregate amount of the copper measured on a tonnage basis, subject to all
     such Export Contracts on such date and such failure shall continue for a
     period of 180 days (as measured on the same basis during such 180 day
     period except the foregoing calculation on each day during such period
     shall be made based on the contracts in effect on such day).
 
          (xi) Any Governmental Authority of the Republic of Peru shall have
     enacted any rule, regulation or law or taken any other action which imposes
     restrictions on the free access to foreign exchange affecting SPCC, SP
     Limited or the Branch or which prohibits the payment of Export Receivables
     into the Collection Account and such rule, regulation, law or action shall
     have a Material Adverse Effect.
 
     A Trigger Event may be rescinded or waived by the affirmative vote of
holders of 51% or more of the aggregate principal amount of the Outstanding
Notes.
 
     Blocked Collections.  Upon the occurrence and during the continuance of any
of the Trigger Events specified in clauses (i), (ii) or (iii) above, the Trustee
on each Business Day shall retain in the Note Collateral Account the applicable
Blocked Percentage of the Excess Collections on such Business Day (the "Blocked
Collections") as additional collateral.
 
     Upon the occurrence and during the continuance of any of the Trigger Events
specified in clauses (iv), (v), (vi), (vii), (ix), (x) or (xi) above, the
Trustee, if so directed by holders of 51% or more of the aggregate principal
amount of the outstanding Notes, shall retain the Blocked Collections in the
Note Collateral Account as
 
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<PAGE>   87
 
additional collateral for the Notes. Upon the occurrence and during the
continuance of any Trigger Event specified in clause (viii) above, the Trustee
may and, if directed by holders of 51% or more of the aggregate principal amount
of the Outstanding Notes, shall, retain the Blocked Collections in the Note
Collateral Account as additional collateral.
 
     Cure of Trigger Events.  Except as otherwise provided in this paragraph, a
Trigger Event shall be deemed cured and not continuing if the event giving rise
to such Trigger Event is no longer continuing and the Issuer or the Guarantor
has provided the Trustee with a certificate of a responsible officer to such
effect. A Trigger Event under clause (i) or (ii) above shall be deemed cured and
not continuing if on the last day of any month (x) the Three Month Ratio for the
Notes with respect to the immediately preceding period of three months is at
least equal to the applicable Three Month Debt Service Coverage Ratio and (y)
the Six Month Ratio for the Notes with respect to the immediately preceding
period of six months is at least equal to the applicable Six Month Debt Service
Coverage Ratio and the Issuer or the Guarantor has provided the Trustee with a
certificate of a responsible officer to such effect. A Trigger Event specified
in clause (iv) above shall be deemed cured on the later of (x) the last day of a
period of six months during which Blocked Collections are retained in the Note
Collateral Account if on such day such Note Collateral Account contains an
amount at least equal to the principal and interest due for the next six Payment
Dates under the Notes (the "Six Month Debt Reserve Amount") and (y) the day on
which the Note Collateral Account contains at least the Six Month Debt Reserve
Amount and the Issuer or the Guarantor has provided the Trustee with a
certificate of a responsible officer to such effect; provided that in the case
of a Trigger Event specified in clause (iv) above, if the holders have elected
the action set forth in clause (ii) or (iii) of " -- Application or Release of
Funds" below, a Trigger Event shall be deemed to be continuing and not cured
until the Guarantor is in compliance with the covenants described under "--
Consolidated Tangible Net Worth" or " -- Capitalization Ratio".
 
     Application or Release of Funds.  Within 20 days of the day on which a
Trigger Event under clause (iv) above is deemed cured, the Trustee shall call a
meeting of holders of the Notes at which the holders of 51% or more of the
aggregate principal amount of the outstanding Notes shall direct the Trustee as
follows: (i) to apply the Six Month Debt Reserve Amount to the ratable
prepayment of the Notes at the redemption price or (ii) to declare that such
Trigger Event constitutes an Accelerated Amortization Event or (iii) to declare
that such Trigger Event constitutes an Event of Default or (iv) to release all
Blocked Collections in the Note Collateral Account to the Issuer. Following the
application or release of funds under clause (i) or (iv) of the preceding
sentence, no further breaches of the covenants described under " -- Consolidated
Tangible Net Worth" and " -- Capitalization Ratio" shall form the basis of
another Trigger Event until such time as the Consolidated Tangible Net Worth of
the Guarantor is at least equal to US$875,000,000 or the Capitalization Ratio of
the Guarantor is no greater than 50% following the breach of the covenant that
gave rise to the Trigger Event, as the case may be. On the date on which a
Trigger Event is cured as specified in " -- Cure of Trigger Events" (other than
a Trigger Event set forth in clause (iv) of "Trigger Events" in which case the
provisions of this paragraph shall apply) the amounts of Blocked Collections in
the Note Collateral Account shall be paid to the Issuer.
 
     Accelerated Amortization Event; Application of Funds.  If (1) a Trigger
Event set forth in clauses (i) or (ii) of "Trigger Events" shall occur and not
be cured within 12 months of the occurrence thereof, an accelerated amortization
event shall automatically occur or (2) a Trigger Event as set forth in clause
(vii) of "Trigger Events" shall occur and be continuing and holders of 51% or
more of the aggregate principal amount of the outstanding Notes have
affirmatively voted (in a vote conducted separately from the vote taken to
direct the Trustee to retain Blocked Collections pursuant to clause (ii) of
" -- Blocked Collections") to declare that such event constitutes an accelerated
amortization event (in each case, together with any Accelerated Amortization
Event declared pursuant to clause (ii) of " -- Application or Release of Funds,"
an "Accelerated Amortization Event"), on each Payment Date following the
occurrence and continuance of an Accelerated Amortization Event, the Issuer or
the Guarantor shall be obligated to redeem the Notes, together with a Make-Whole
Premium on the amount redeemed, in an amount equal to the amount on deposit in
the Note Collateral Account on the day immediately preceding such Payment Date,
after giving effect to the payments set forth in clauses (i) and (ii) of "Note
Collateral Account" and clauses (i) through (iv) of "Application of Funds",
minus the amount of the Make-Whole Premium with respect to such redemption. An
Accelerated Amortization Event with respect to the Notes may be rescinded or
waived by affirmative vote of the holders of 51% or more of the aggregate
principal amount
 
                                       85
<PAGE>   88
 
of the outstanding Notes. Following the cure of the Trigger Event which gave
rise to such Accelerated Amortization Event, the resulting Accelerated
Amortization Event shall be deemed cured and there shall be no further
redemption of Notes resulting from such Trigger Event.
 
  Events of Default
 
     Each of the following will be Events of Default:
 
          (i) default in the payment of any principal or premium, if any, due on
     the Notes, whether at maturity, redemption or otherwise, or default by the
     Issuer in the payment of any interest or any Additional Amounts due on any
     Note within five business days of its scheduled payment date; or
 
          (ii) default in the performance or breach by the Guarantor of the
     covenants described under "-- Consolidated Tangible Net Worth" and
     " -- Capitalization Ratio", and such default is declared an Event of
     Default by the holders of at least 51% of the aggregate principal amount of
     the outstanding Notes; or
 
          (iii) default by the Issuer or the Guarantor in the performance or
     observance of (a) the covenant described under "-- Limitation on Certain
     Sales of Assets" or (b) the covenant described under " -- Merger,
     Consolidation, etc."; or
 
          (iv) default in the performance or breach by the Issuer or the
     Guarantor of: (a) any covenant set forth under " -- Compliance with Laws
     and PAMA", " -- Conduct of Business and Maintenance of Existence",
     " -- Reports; Notices", or " -- Maintenance of Property; Insurance", and
     such failure shall continue unremedied for a period of 45 days following
     the date a Company Notice shall have been given (except that in the case of
     a failure to comply with the covenant set forth in paragraph 4 under
     " -- Reports; Notices" as a result of a failure to deliver notices of
     Trigger Events, Accelerated Amortization Events, Events of Defaults or
     Defaults, such failure need only continue for a period of 10 days after the
     earlier of (x) the date a Company Notice shall have been given or (y) the
     date a responsible officer of the Issuer shall have acquired actual
     knowledge of such default); (b) the covenant set forth under " -- Liens"
     and such failure shall continue unremedied (A) for a period of 10 days, if
     the Issuer shall create, incur or assume any Lien in violation of such
     covenant, or (B) for a period of 45 days, if the Issuer shall permit to
     exist any Lien in violation of such covenant, in each case after the
     earlier of (x) the date a Company Notice shall have been given or (y) the
     date a responsible officer of the Issuer shall have acquired actual
     knowledge of such default; (c) the covenant described under
     " -- Preservation of Security Interest" and such failure shall continue
     unremedied (A) for a period of 15 days, with respect to the failure to take
     any action required to be taken within the United States, or (B) for a
     period of 45 days, with respect to the failure to take any action required
     to be taken outside of the United States, after the earlier of (x) the date
     a Company Notice shall have been given or (y) the date a responsible
     officer of the Issuer shall have acquired actual knowledge of such default;
     or (d) any other term, covenant or obligation of the Issuer or the
     Guarantor in the Amended and Restated Collateral Trust Agreement, the
     Indenture, the Notes and the Guarantee endorsed thereon not otherwise
     expressly defined as an Event of Default in (i), (ii), (iii), or (iv)(a)(b)
     or (c) above for a period of more than 60 days after the earlier of (x) the
     date a Company Notice shall have been given or (y) the date a responsible
     officer of the Issuer shall have acquired actual knowledge of such default;
     or
 
          (v) any of the representations and warranties of the Issuer or the
     Guarantor in any Transaction Document to which it is a party is untrue or
     incorrect in any material respect on the date when made or deemed made and
     shall not have been remedied within 45 days after a Company Notice shall
     have been given; or
 
          (vi) (a) there shall be commenced against the Guarantor, the Issuer or
     any of their respective Material Subsidiaries, or the Branch, any case,
     proceeding or other action of a nature referred to in clause (vii)(a) below
     which (A) results in the entry of an order for relief or any such
     adjudication or appointment or (B) remains undismissed, undischarged or
     unbonded for a period of 60 days, or (b) there shall be commenced against
     the Guarantor, the Issuer or any of their Material Subsidiaries (as defined
     in the Indenture), or the Branch, any case, proceeding or other action
     seeking issuance of a warrant of attachment,
 
                                       86
<PAGE>   89
 
     execution, distraint or similar process against all or any substantial part
     of its assets which results in the entry of an order for any such relief
     which shall not have been vacated, discharged, or stayed or bonded pending
     appeal within 60 days from the entry thereof; or (c) the Guarantor, the
     Issuer or any of their respective Material Subsidiaries, or the Branch,
     shall take any action in furtherance of, or indicating its consent to,
     approval of, or acquiescence in, any of the acts set forth in clause (a) or
     (b) above; or (d) the Guarantor, the Issuer or any of their respective
     Material Subsidiaries, or the Branch, shall generally not, or shall be
     unable to, or shall admit in writing its inability to, pay its debts as
     they become due; or
 
          (vii) the Guarantor, the Issuer or any of their respective Material
     Subsidiaries, or the Branch, shall commence any case, proceeding or other
     action (A) under any existing or future law of any jurisdiction, domestic
     or foreign, relating to bankruptcy, insolvency, reorganization or relief of
     debtors, seeking to have an order for relief entered with respect to it, or
     seeking to adjudicate it a bankrupt or insolvent, or seeking
     reorganization, arrangement, adjustment, winding-up, liquidation,
     dissolution, composition or other relief with respect to it or its debts,
     or (B) seeking appointment of a receiver, trustee, custodian, conservator
     or other similar official for it or for all or any substantial part of its
     assets, or the Guarantor, the Issuer or any of their respective Material
     Subsidiaries, or the Branch, shall make a general assignment for the
     benefit of its creditors; or
 
          (viii) the Issuer or the Guarantor shall fail to deliver notice and an
     acknowledgment to any customers located outside of Peru under Export
     Contracts for the purchase of copper if such failure is attributable to an
     intention by the Issuer or the Guarantor to avoid the security arrangements
     described therein and in the Amended and Restated Collateral Trust
     Agreement and such failure shall continue unremedied for a period of 10
     days after the earlier of (x) the date a Company Notice shall have been
     given or (y) the date a responsible officer of the Issuer shall have
     acquired actual knowledge of such default; or
 
          (ix) the Collateral Trustee ceases for any reason to have a perfected
     first priority security interest in the Collateral, other than Liens of the
     type set forth in clauses (iii), (viii) and (ix) of the definition of
     "Permitted Liens", or the Trustee ceases for any reason to have a perfected
     first priority security interest in the Note Collateral, other than Liens
     of the type set forth in clauses (iii), (viii) and (ix) of the definition
     of "Permitted Liens", and any such cessation is not cured, or Adequate
     Substitute Collateral (as defined in clause (viii) of "Trigger Events") is
     not provided, within 30 days after the earlier of (x) the date a Company
     Notice shall have been given or (y) the date a responsible officer of the
     Issuer shall have acquired actual knowledge of such default; or
 
          (x) the Issuer or the Guarantor shall (a) default in the payment of
     the principal of or interest on, any note, bond, or other instrument
     evidencing Debt aggregating (without duplication) $30 million in excess,
     other than the Notes, issued, assumed or guaranteed by it, when and as the
     same shall become due and payable, if such default shall continue for more
     than the period of grace, if any, originally applicable thereto, or (b)
     default in the observance of any other terms and conditions relating to any
     such Debt, if the effect of such default is to cause such Debt to become
     due prior to its stated maturity other than as a result of a Mandatory
     Prepayment Event; or
 
          (xi) any Governmental Authority of the Republic of Peru shall have
     condemned, nationalized, seized, or otherwise expropriated (for a period
     greater than 60 days) all or substantially all of the property of the
     Issuer or the Guarantor; or
 
          (xii) it becomes unlawful for the Issuer or the Guarantor to perform
     any of its obligations under the Indenture, the Notes or the Guarantee
     endorsed thereon, if the failure to so perform would result in a Material
     Adverse Effect; the Notes, or the Guarantee endorsed thereon, cease to be
     valid, binding and enforceable in accordance with their terms or the
     binding effect or enforceability thereof shall be contested by the Issuer
     or the Guarantor; or the Issuer or the Guarantor shall deny in writing or
     by public announcement that it has any further liability or obligation
     thereunder or in respect thereof.
 
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<PAGE>   90
 
  Remedies
 
     If such Event of Default (other than an Event of Default specified in
subparagraph (vi) and (vii) above) occurs and is continuing then and in every
such case the holders of not less than 51% in aggregate principal amount of the
outstanding Notes may declare the principal amount of all the Notes to be due
and payable immediately, by a notice in writing to the Issuer, the Guarantor and
to the Trustee, and upon any such declaration such principal amount and any
accrued interest shall become immediately due and payable; provided, however,
that if any of the foregoing Events of Default constituted a Trigger Event, the
holders of the Notes shall conduct a vote (separate from the vote taken to
direct the Trustee to retain Blocked Collections, unless no vote was taken in
connection with a Trigger Event described in clause (ix) of " -- Trigger
Events") to so declare the Notes due and payable. If an Event of Default
specified in subparagraph (vi) or (vii) above occurs, the principal of and any
accrued interest on all the Notes then outstanding shall become immediately due
and payable, and without presentment, demand, protest or notice of any kind all
of which are hereby expressly waived by the Issuer. In addition, immediately
upon the Notes becoming or being declared due and payable, 100% of all
Collections deposited in the Note Collateral Account shall be retained therein
and applied as described below.
 
     The remedies described above are without prejudice to the rights of each
individual holder to initiate an action against the Issuer or the Guarantor for
the payment of any principal, premium, if any, Additional Amounts and/or
interest past due on any Notes.
 
     Any money collected by the Trustee on behalf of holders of Notes after the
occurrence of an Event of Default as described above shall be applied in the
following order:
 
          First: To the payment of all amounts due the Trustee pursuant to the
     Indenture;
 
          Second: To the payment of the amounts then due and unpaid for
     principal of (and premium, if any, on) and interest on the Notes in respect
     of which or for the benefit of which such money has been collected,
     ratably, without preference or priority of any kind, according to the
     amounts due and payable on such Notes for principal (and premium, if any)
     and interest, respectively; and
 
          Third: The balance, if any, to the persons entitled thereto.
 
  Representations and Warranties
 
     In addition to the representations and warranties as to the Collateral
contained in the Amended and Restated Collateral Trust Agreement, the Issuer and
the Guarantor will each represent and warrant (as to itself) as of the issue
date of the Notes with respect to the following matters: due organization;
corporate authority; due execution and delivery of the Transaction Documents; no
contravention of laws or material contractual obligations; receipt of necessary
consents; no material litigation except as disclosed; financial statements;
payment of taxes; compliance with environmental laws; rights to use or operate
the Principal Properties.
 
REPLACEMENT OF NOTES
 
     If any Notes shall at any time become mutilated, defaced, destroyed, stolen
or lost, such Notes may be replaced at the cost of the applicant at the
specified office of the Trustee, upon provision of evidence satisfactory to the
Trustee and the Issuer that such Note was destroyed, stolen or lost, together
with such indemnity as the Trustee and the Issuer may require. Mutilated or
defaced Notes must be surrendered before replacements will be issued.
 
DEFEASANCE
 
     The Issuer may at any time terminate all of its obligations with respect to
the Notes ("defeasance"), except for certain obligations, including those
regarding any trust established for a defeasance and obligations to register the
transfer or exchange of the Notes, to replace mutilated, destroyed, lost or
stolen Notes and to maintain agencies in respect of Notes. The Issuer may at any
time terminate its obligations under certain covenants set forth in the
Indenture, and any omission to comply with such obligations shall not constitute
a Default with respect to the Notes issued under the Indenture ("covenant
defeasance"). In order to exercise either defeasance or
 
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<PAGE>   91
 
covenant defeasance, the Company must irrevocably deposit in trust, for the
benefit of the holders of the Notes, with the Trustee money or U.S. government
obligations, or a combination thereof, in such amounts as will be sufficient to
pay the principal of, and interest on the Notes to redemption or maturity and
comply with certain other conditions, including the delivery of an opinion as to
certain tax matters.
 
SATISFACTION AND DISCHARGE OF INDENTURE
 
     The Indenture, will upon the Issuer's request, cease to be of further
effect (except as to any surviving rights of registration of transfer or
exchange of Notes and except as otherwise specially provided in the Indenture),
and the Trustee will execute proper instruments acknowledging satisfaction and
discharge of the Indenture, when either (a) all Notes theretofore authenticated
and delivered (other than (i) Notes which have been destroyed, lost or stolen
and which have been replaced or paid and (ii) Notes for whose payment money has
theretofore been deposited in trust with the Trustee or any Paying Agent) have
been delivered to the Trustee for cancellation; or (b) all Notes not theretofore
delivered to the Trustee for cancellation (i) have become due and payable, (ii)
will become due and payable at their stated maturity within one year or (iii)
are to be called for redemption within one year and the Issuer or the Guarantor
in the case of any of the preceding clauses (i), (ii) or (iii) has irrevocably
deposited or caused to be irrevocably deposited with the Trustee an amount
sufficient to pay and discharge the entire indebtedness on such Notes not
theretofore delivered to the Trustee for cancellation, for principal, premium,
if any, and Additional Amounts, if any, and interest to the date of such deposit
(in the case of Notes which have become due and payable) or to the stated
maturity or date of redemption, as the case may be.
 
MODIFICATION AND WAIVER
 
     With the consent of the holders of not less than 51% in principal amount of
the outstanding Notes the Issuer and the Guarantor may enter into Supplemental
Indentures to modify the rights of the holders of the Notes; provided, however,
that no Supplemental Indenture shall, without the consent of the holder of each
outstanding Note, (i) change the stated maturity of the principal of or any
installment of interest on any Notes; (ii) reduce the principal amount of,
premium, if any, or interest on any Notes including discharge of repayment of
principal of, premium, if any, or interest on any Notes; (iii) reduce the
percentage in principal amount of outstanding Notes the consent of whose holders
is required for any waiver of compliance with certain provisions of the
Indenture or defaults thereunder; (iv) change in the percentage rules
established for holders which are entitled to request the calling of a holders'
meeting, adopting resolutions at meetings of holders or regarding the quorum
necessary to constitute a meeting; (v) modify the percentage in principal amount
of outstanding Notes necessary to waive a past Event of Default or any
modification of the provision described in this paragraph (except to increase
any such percentage); (vi) change the place of payment of principal of, or
premium or interest on, any Notes; (vii) impair the right to institute suit for
the enforcement of any such payment on or after the stated maturity thereof or
any redemption date or repayment date therefor; or (viii) change the requirement
to pay Additional Amounts. Except as provided above, any modifications,
amendments or waivers to the terms and conditions of the Notes will be
conclusive and binding on all holders, whether or not they were present at any
meeting, and whether or not notation of such modifications, amendments or
waivers is made upon the Notes. The holders of the Notes will receive prior
notice (as described under " -- Reports; Notices") of any proposed amendment to
the Notes or the Indenture described in this paragraph.
 
     After an amendment described in the preceding paragraph becomes effective,
the Company is required to mail to the holders of Notes a notice briefly
describing such amendment. However, the failure to give such notice to all
holders of the Notes, or any defect therein, will impair or affect the validity
of the amendment.
 
     The consent of the holders of the Notes is not necessary to approve the
particular form of any proposed amendment. It is sufficient if such consent
approves the substance of the proposed amendment.
 
     The Issuer, the Guarantor and the Trustee may, without the consent of any
holders, amend or supplement the Indenture as follows: to provide for the
assumption by another person of the obligations of the Issuer and the Guarantor
contained in the Indenture, the SENs, or in the Guarantee; to add to the
covenants of the Issuer or the Guarantor for the benefit of the holders of all
or any series of SENs; to surrender any right or power conferred upon the Issuer
or the Guarantor in the Indenture; to add any additional Trigger Events,
Accelerated Amortization
 
                                       89
<PAGE>   92
 
Events or Events of Default; to secure the SENs or the Guarantees; to establish
the form or terms of SENs and the applicable accounts of such SENs or of the
related Guarantee as permitted by the Indenture; to evidence and provide for the
acceptance of appointment by a successor Trustee and to add to or change any of
the provisions of the Indenture as shall be necessary to provide for or
facilitate the administration of the trusts thereunder by more than one Trustee;
to close the Indenture with respect to the authentication and delivery of
additional series of SENs, to cure any ambiguity; to correct or supplement any
provision therein which may be inconsistent with any other provision therein;
provided such action shall not adversely affect the interests of the holders of
the Notes or SENs of any other series in any material respect; to comply with
requirements of the Commission in order to effect or maintain the qualification
under the TIA; or to supplement any of the provisions of the Indenture to such
extent as shall be necessary to permit or facilitate the defeasance and
discharge of the notes or any other series of SENs pursuant to the Indenture;
provided that any such action shall not adversely affect the interests of the
Holders of the Notes or any other series of SENs in any material respect.
 
NOTICES
 
     All notices regarding the Notes will be deemed to have been sufficiently
given (unless otherwise herein expressly provided), if in writing and mailed,
first-class postage prepaid to each such holder affected by such event, at his
address as it appears in the Notes Register. In any case where notice to holders
of Notes is given by mail, neither the failure to mail such notice, nor any
defect in any notice so mailed, to any particular holder shall affect the
sufficiency of such notice with respect to other holders of Notes given as
provided. Any notice mailed to a holder in the manner herein provided shall be
conclusively deemed to have been received by such holder whether or not such
holder actually receives such notice.
 
MEETINGS OF HOLDERS
 
     The Trustee shall call, upon the request of the holders of at least 10% in
aggregate principal amount of the Notes at the time outstanding, or the Issuer,
the Guarantor or the Trustee, at its discretion, may call a meeting of the
holders at any time and from time to time, in each case to make, give or take
any request, demand, authorization, direction, notice, consent, waiver or other
action provided by the Notes to be made, given or taken by the holders. The
meetings shall be held at such time and at such place as the Trustee shall
determine. If a meeting is being held pursuant to a request of holders, the
agenda for the meeting shall be as determined in the request and such meeting
shall be conveyed within 40 days from the date such request is received by the
Trustee, the Issuer or the Guarantor, as the case may be. Notice of any meeting
of holders (which shall include the date, place and time of the meeting, the
agenda therefor and the requirements to attend) shall be given not less than 10
days nor more than 30 days prior to the date fixed for the meeting in the manner
provided above under "Notices".
 
     Any holder may attend the meeting in person or by proxy. The quorum at any
meeting called to adopt a resolution will be persons holding or representing at
least 51% in aggregate principal amount of the Notes at the time outstanding;
provided, however, that at any such reconvened meeting adjourned for lack of the
requisite quorum, the quorum will be persons holding or representing 30% in
aggregate principal amount of the Notes at the time outstanding. Notwithstanding
the foregoing, any resolution with respect to any action to be taken by holders
of Notes requiring the affirmative vote of holders of at least 51% in aggregate
principal amount of the Notes at the time outstanding may be taken only by the
affirmative vote of the holders of Notes holding at least such required
percentage of aggregate outstanding principal amount of Notes.
 
TRUSTEE
 
     The Indenture contains provisions for the indemnification of the Trustee
other than for losses, liability, damages, claims and expenses incurred due to
negligence or bad faith. The obligations of the Trustee to any holder of a Note
are subject to such immunities and rights as are set forth in the Indenture.
 
     The Issuer, the Guarantor and its affiliates may from time to time enter
into normal banking and trustee relationships with the Trustee and its
affiliates. The Trustee and any of its affiliates may hold Notes in their own
respective names.
 
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<PAGE>   93
 
     The Issuer (i) may remove the Trustee in certain circumstances set forth in
the Indenture and (ii) may, at its discretion, remove the Trustee at any time,
provided that in the case of a removal pursuant to clause (ii) the appointment
of a successor trustee with respect to the Notes will not be effective until the
Issuer has provided notice to the holders of Notes and solicits a vote of such
holders and the holders of 51% or more of the aggregate principal amount of the
outstanding Notes do not vote against the removal of the Trustee.
 
GOVERNING LAW
 
     All matters in respect of the Indenture, the Notes, the Guarantee, the
Trustee and the Amended and Restated Collateral Trust Agreement will be governed
by, and construed in accordance with, the laws of the State of New York.
 
     The Issuer and the Guarantor consent under the Indenture to the
non-exclusive jurisdiction of any court of the State of New York or any United
States federal court sitting in the Borough of Manhattan, New York City, New
York, United States, and any appellate court from any thereof, and waive any
immunity from the jurisdiction of such courts over any suit, action or
proceeding that may be brought in connection with the Indenture or the SENs. The
Issuer and the Guarantor irrevocably waive, to the fullest extent permitted by
law, any objection to any suit, action, or proceeding that may be brought in
connection with this Indenture or the SENs in such courts whether on the grounds
of venue, residence or domicile or on the ground that any such suit, action or
proceeding has been brought in an inconvenient forum. The Issuer and the
Guarantor agree that final judgment in any such suit, action or proceeding
brought in such court shall be conclusive and binding upon the Issuer or the
Guarantor and may be enforced in any court to the jurisdiction of which the
Issuer or the Guarantor is subject by a suit upon such judgment; provided that
service of process is effected upon the Issuer or the Guarantor in the manner
provided by the Indenture.
 
     Each of the Issuer and the Guarantor will appoint an agent in New York City
for service of process if the Issuer or the Guarantor ceases to have a place of
business in New York City and agree that service of all writs, process and
summonses in any suit, action or proceeding brought in connection with the
Indenture, the SENs or the Guarantees against the Issuer or the Guarantor in any
court of the State of New York or any United States federal court sitting in the
Borough of Manhattan, New York City may be made upon such process agent, whom
the Issuer and the Guarantor each appoint as its authorized agent for service of
process. With respect to any such action in any court of the State of New York
or any United States federal court in the Borough of Manhattan, New York City,
service of process upon such person, as the authorized agent of the Issuer or
the Guarantor for service of process, and written notice of such service to the
Issuer or the Guarantor, shall be deemed, in every respect, effective service of
process upon the Issuer or the Guarantor.
 
CURRENCY INDEMNITY
 
     To the fullest extent permitted by applicable law, the obligation of the
Issuer and the Guarantor in respect of any amount due under the Indenture with
respect to the Notes shall, notwithstanding any payment in any other currency
(whether pursuant to a judgment or otherwise), be discharged only to the extent
of the amount in Dollars that the Person entitled to receive that payment may,
in accordance with normal banking procedures, purchase with the sum paid in such
other currency (after any premium and costs of exchange) on the Business Day
immediately following the day on which that Person receives that payment. If the
amount in Dollars that may be so purchased for any reason falls short of the
amount originally due, the Issuer or the Guarantor shall pay such additional
amounts, in Dollars, as may be necessary to compensate for the shortfall and if
the Dollars so purchased exceed the amount originally due, such excess shall be
remitted to the Issuer or the Guarantor, as the case may be. Any obligation of
the Issuer and the Guarantor not discharged by that payment shall, to the extent
permitted by applicable law, be due as a separate and independent obligation
and, until discharged as provided therein, shall continue in full force and
effect.
 
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<PAGE>   94
 
CERTAIN DEFINITIONS
 
     The following is a summary of certain defined terms used in the Indenture
and the Amended and Restated Collateral Trust Agreement. Reference is made to
those documents for the full definition of all such terms as well as other
capitalized terms used herein for which no definition is provided.
 
     "Acknowledgments" means written acknowledgments from customers under annual
Export Contracts pursuant to which such customers, among other things,
acknowledge the liens created pursuant to the terms of the Amended and Restated
Collateral Trust Agreement and agree to pay any amounts owing for copper
delivered under such contracts over to the Collateral Trustee for deposit in the
Collection Account.
 
     "Additional Percentage" means, for any date, such additional percentage
interest in the Export Receivables and in the Collections therefrom to be
transferred from the Collection Account to the Note Collateral Account, as may
be designated by the Issuer in writing to the Collateral Trustee and the Trustee
pursuant to Section 2.04 of the Collateral Trust and Security Agreement.
 
     "Additional Secured Obligations" means any debt issued by the Issuer or
loan made to the Issuer, after March 31, 1997 but prior to the termination of
the Amended and Restated Collateral Trust Agreement, secured by a security
interest in the Collateral pursuant to the Amended and Restated Collateral Trust
Agreement; provided that the SENs Secured Obligations and Credit Facility
Secured Obligations may not be designated as "Additional Secured Obligations"
pursuant to the Amended and Restated Collateral Trust Agreement.
 
     "Blocked Percentage" means, on any date of determination (except as may be
otherwise set forth in the Supplemental Indenture), (a) if the Outstanding
Principal Amount is less than US$300 million, 100%; (b) if the Outstanding
Principal Amount is at least US$300 million but not in excess of US$500 million,
75%; and (c) if the Outstanding Principal Amount is more than US$500 million,
50%.
 
     "Blocking Event" means any Trigger Event which results in the retention of
Collections in the Note Collateral Account.
 
     "Business Day" means any day, other than a Saturday or Sunday, that is not
a day on which banking institutions are authorized or required by law or
executive order to be closed in New York City or Lima.
 
     "Capitalization Ratio" means, at any date of determination, the ratio of
(i) Consolidated Net Debt at such date of determination to (ii) the sum of (a)
Consolidated Net Debt at such date of determination plus (b) Consolidated Net
Worth at such date of determination plus (c) Minority Interests at such date of
determination.
 
     "Collections" means all collections and other proceeds received in respect
of the Export Contracts and Export Receivables (including as a result of the
exercise of any remedies under the Amended and Restated Collateral Trust
Agreement).
 
     "Commitment Termination Date" means the date on which the lenders'
commitments under the Credit Facility shall terminate.
 
     "Company Notice" means the giving of written notice by (i) the Trustee to
the Issuer and the Guarantor or (ii) by the holders of at least 10% of the
aggregate principal amount of the outstanding Notes to the Trustee, the Issuer
and the Guarantor specifying a default or break under the Indenture and stating
that such notice is a "Notice of Default."
 
     "Consolidated Net Debt" means, at any date of determination, (a) all Debt
of the Guarantor and its Subsidiaries at such date of determination minus (b)
the aggregate amount of cash on deposit in funded escrow accounts at such date
of determination in which a Lien has been granted to secure the repayment of any
such Debt.
 
     "Consolidated Net Worth" means, at any date of determination, all items
which would, in accordance with U.S. GAAP, be included under shareholders'
equity on a consolidated balance sheet of the Guarantor and its Subsidiaries at
such date of determination adjusted to exclude the effects of (i) any non-cash,
nonrecurring charges, (ii) any non-cash extraordinary charges and (iii) any
other non-cash charges required as a result of a
 
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<PAGE>   95
 
change after March 31, 1997 of accounting principles or in the application
thereof under U.S. GAAP in the year of such charge or in the year of adoption of
any such change and without giving effect to the future effects of such charge
or change. In the case of clauses (i) and (ii), "non-cash" refers to the portion
of the charge which, at the time of the charge, will not be required to be paid
prior to the final maturity of any outstanding SEN.
 
     "Consolidated Tangible Net Worth" means, at any date of determination,
Consolidated Net Worth at such date of determination after deducting therefrom
the sum of deferred charges, goodwill, trademarks and other intangibles of the
Guarantor and its Subsidiaries reflected on the consolidated balance sheet of
the Guarantor at such date of determination.
 
     "Copper" means anode copper, blister copper, cathodes, copper concentrates,
electrolytic cathodes, and electrowon cathodes.
 
     "Credit Facility Basic Collateral Percentage" means, at any time, the
percentage equivalent of a fraction, the numerator of which shall be the
aggregate principal amount of loans outstanding under the Credit Facility at
such time and the denominator of which shall be the Program Amount then in
effect; provided that, from the Commitment Termination Date until the payment in
full of all Credit Facility Secured Obligations, the numerator of such fraction
shall be (a) the aggregate principal amount of loans outstanding under the
Credit Facility Agreement on the Commitment Termination Date minus (b) the
aggregate principal amount of such loans that have been permanently optionally
prepaid or permanently mandatorily prepaid as a result of the issuance of all
series of SENs or Additional Secured Obligations (to the extent that the sum of
the aggregate principal amount so prepaid plus the aggregate principal amount of
all scheduled principal payments (after giving effect to any reduction in such
scheduled payments as a result of such prepayment) made prior to such time
exceeds the aggregate principal payments originally scheduled to have been made
by such time) subsequent to the Commitment Termination Date.
 
     "Credit Facility Secured Obligations" means the collective reference to the
unpaid principal of and interest on the loans under the Credit Facility and all
other obligations and liabilities of the Issuer (including, without limitation,
interest accruing at the then applicable rate provided in the Credit Facility
after the maturity of such loans and interest accruing at the then applicable
rate provided in the Credit Facility after the filing of any petition in
bankruptcy, or the commencement of any insolvency, reorganization or like
proceeding relating to the Issuer, whether or not a claim for post-filing or
post-petition interest is allowed in such proceeding) to the Administrative
Agent, the Collateral Agent, any other Credit Facility Agent or any Credit
Facility Lender (such as defined in the Amended and Restated Collateral Trust
Agreement), whether direct or indirect, absolute or contingent, due or to become
due, or now existing or hereafter incurred, which may arise under, out of, or in
connection with, the Credit Facility, the other Loan Documents (as defined in
the Credit Facility) or any other document made, delivered or given in
connection therewith, in each case whether on account of principal, interest,
reimbursement obligations, fees, indemnities, costs, expenses or otherwise
(including, without limitation, all fees and disbursements of counsel to the
Administrative Agent, the Collateral Agent or any other Credit Facility Agent or
to the Credit Facility Lenders that are required to be paid by the Issuer
pursuant to the terms of any of the foregoing agreements).
 
     "Credit Facility Total Collateral Percentage" means, at any time, the
percentage interest in the Collateral of the Credit Facility Lenders, which
shall be equal to the Credit Facility Basic Collateral Percentage at such time
plus the Additional Percentage applicable to the Credit Facility, if any, at
such time.
 
     "Debt" means, of any person at any date, without duplication, (a) all
indebtedness of such person for borrowed money or for the deferred purchase
price of property or services (other than current trade liabilities incurred in
the ordinary course of business and payable in accordance with customary
practices), (b) all obligations of such person under leases of real or personal
property which are required to be capitalized, (c) all guarantees or
endorsements (other than endorsements for collection or deposit in the ordinary
course of business) of such person of Debt of others and (d) all liabilities
secured by any Lien on any property owned by such person even though such person
has not assumed or otherwise become liable for the payment thereof.
 
     "Debt Service Retention Event" means, at any date of determination, the Six
Month Ratio for the most recently ended six month period is less than 3.0 to
1.0.
 
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<PAGE>   96
 
     "Default" means any event which is, or after notice or passage of time or
both would be, an Event of Default.
 
     "Designated Basic Collateral Percentage" means, at any time with respect to
any Additional Secured Obligations, the percentage interest in the Collateral of
the holders of such Additional Secured Obligations designated by the Issuer
pursuant to the Amended and Restated Collateral Trust Agreement in connection
with the issuance or incurrence of such Additional Secured Obligations, as such
percentage may, subject to the provisions of the Amended and Restated Collateral
Trust Agreement, be adjusted from time to time pursuant to the instruments under
which such Additional Secured Obligations were issued.
 
     "Designated Total Collateral Percentage" means, at any time with respect to
any Additional Secured Obligations, the Designated Basic Collateral Percentage
for such Additional Secured Obligations at such time plus the Additional
Percentage applicable to such Additional Secured Obligations, if any, at such
time.
 
     "Excess Collections" has the meaning set forth in "Accounts -- Note
Collateral Account".
 
     "Excluded Export Contracts" means agreements relating to sales of Copper
(which is produced at any of the Principal Properties or the SX/EW facility from
copper mined or leached at any of the Principal Properties or from purchased
copper) by the Issuer, SPCC or any direct or indirect Subsidiary of either to
customers located outside Peru which are, from time to time, identified on a
certificate of a responsible officer of the Issuer, or in Exhibit 2.02 to the
Collateral Trust and Security Agreement, in each case in accordance with, and
subject to the limitations set forth in, "The Amended and Restated Collateral
Trust Agreement -- Excluded Export Contracts".
 
     "Excluded Export Receivables" means Receivables arising from Excluded
Export Contracts.
 
     "Export Contract" means any agreement, other than Excluded Export
Contracts, relating to sales of Copper (which is produced at any of the
Principal Properties or the SX/EW facility from copper mined or leached at any
of the Principal Properties or from purchased copper) by the Issuer, SPCC or any
direct or indirect Subsidiary of either to customers located outside Peru.
 
     "Export Receivables" means all Receivables, other than Excluded Export
Receivables, arising from (i) the sale of Copper (which is produced at any of
the Principal Properties or the SX/EW facility from copper mined or leached at
any of the Principal Properties or from purchased copper) to customers located
outside of Peru and (ii) the sale of Copper (which is produced at any of the
Principal Properties or the SX/EW facility from copper mined or leached at any
of the Principal Properties or from purchased copper) to customers located
outside of Peru which are effected through any Peruvian Governmental Authority,
including without limitation, in each case, all Receivables arising under Export
Contracts.
 
     "Governmental Authority" means any nation or government, any state,
regional or other political subdivision thereof and any entity exercising
executive, legislative, judicial, regulatory or administrative functions of or
pertaining to government.
 
     "Initial Deposit" means $2,962,500.
 
     "Lien" means any mortgage, pledge, hypothecation, assignment, lien
(statutory or other), charge or other security interest of any kind.
 
     "Make-Whole Premium" means the amount, determined as of the Business Day
prior to the Applicable Date (as defined below) of the Notes (or the portion
thereof) to be redeemed or prepaid, as the case may be, equal to the amount (but
not less than zero) obtained by subtracting (a) the sum of the unpaid principal
amount of such Notes (or the portion thereof) being redeemed or prepaid and the
amount of interest thereon accrued to such date of redemption, from (b) the sum
of the Current Values (as defined below) of all amounts of principal and
interest on such Notes (or the portion thereof) being redeemed or prepaid that
would otherwise have become due after the date of such determination if such
Notes were not being redeemed (each such amount of principal or interest being
referred to herein as an "Amount Payable"). The "Current Value" of any Amount
Payable means such Amount Payable discounted (on a monthly basis) to its present
value on the date of determination, in accordance with the following formula:
 
                        Current Value = Amount Payable .
                                        --------------  
                                           (1 + d/12)n
 
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<PAGE>   97
 
where "d" is in the sum of (i) 75 basis points plus (ii) the Treasury Yield (as
defined below) per annum expressed as a decimal and "n" is an exponent (which
need not be an integer) equal to the number of monthly periods and portions
thereof (any such portion of a period to be determined by dividing the number of
days in such portion of such period by the total number of days in such period,
both computed on the basis of twelve 30-day months in a 360-day year) between
the date of such determination and the due date of the Amount Payable. The
"Treasury Yield" shall be determined by reference to the yields for U.S.
Treasury securities as indicated (currently on page "500" thereof) on the
Telerate Screen for actively traded U.S. Treasury securities at approximately
10:00 a.m. (New York City time) on the Business Day next preceding such
Applicable Date or, if such yields shall not be reported as of such time or the
yields reported as of such time shall not be ascertainable, by reference to the
most recent Federal Reserve Statistical Release H.15 (519) which has become
publicly available at least two Business Days prior to such Applicable Date (or,
if such Statistical Release is no longer published, any publicly available
source of similar market data acceptable to the Trustee), and shall be the most
recent weekly average yield on actively traded U.S. Treasury securities adjusted
to a constant maturity equal to the then remaining weighted average life of the
outstanding principal amount of such Notes (the "Remaining Life"), computed by
dividing (A) the sum of all remaining principal payments on such Notes into (B)
the total of the products obtained by multiplying (1) the amount of each
remaining principal payment on such Notes by (2) the number of years (calculated
to the nearest one-twelfth) which will elapse between the date as of which such
computation is made and the due date of each remaining principal payment on such
Notes. If the Remaining Life is not equal to the constant maturity of a U.S.
Treasury security for which a weekly average yield is given, the Treasury Yield
shall be obtained by linear interpolation (calculated to the nearest one-twelfth
of a year) from the weekly average yields of (x) the actively traded U.S.
Treasury security with the average life closest to and greater than the
Remaining Life and (y) the actively traded U.S. Treasury security with the
average life closest to and less than the Remaining Life, except that if the
Remaining Life is less than one year, the weekly average yield on actively
traded U.S. Treasury securities adjusted to a constant maturity of one year
shall be used. The Treasury Yield shall be computed to the fifth decimal place
(one-thousandth of a percentage point) and then rounded to the fourth decimal
place (one hundredth of a percentage point). "Applicable Date" means (i) with
respect to any redemption of the Notes, the Business Day preceding the day on
which the notice of redemption is given pursuant to Section 1304 and (ii) with
respect to any prepayment resulting from an Accelerated Amortization Event, the
Business Day preceding the date of such prepayment.
 
     "Mandatory Prepayment Event" means any event (other than an event of
default or similar event) which requires the Issuer to make any mandatory
prepayment (including, without limitation, as a result of an accelerated
amortization event) in respect of the principal of any loans made pursuant to
the Credit Facility or Additional Secured Obligations (other than regularly
scheduled payments of principal) or to make any mandatory redemption, defeasance
or purchase of any such loans or Additional Secured Obligations.
 
     "Material Adverse Effect" means a material adverse effect on (a) the
ability of the Issuer or the Guarantor, as the case may be, to meet its
obligations to pay interest on, principal of, or any premium on, the Notes or
any other payment obligation under the Indenture or (b) the validity or
enforceability of the Indenture or any of the other Transaction Documents.
 
     "Minority Interests" means, at any date of determination, all amounts
reflected in respect of minority interests, in accordance with U.S. GAAP, on the
consolidated balance sheet of the Guarantor and its Subsidiaries at such date of
determination.
 
     "Notice of Default of Amended and Restated Collateral Trust Agreement"
means a written notice delivered to the Collateral Trustee by (i) the holders of
51% or more of the outstanding principal amount of any series of SENs or (ii)
the Required Lenders (as defined under the Credit Facility) or (iii) the holders
of the requisite percentage of any Additional Secured Obligations (which are not
held by the Issuer or any affiliate thereof) for taking actions or giving
directions, following events of default, in each case stating that an event of
default has occurred under the applicable agreement and specifying such notice
as a "Notice of Default" under the Amended and Restated Collateral Trust
Agreement.
 
     "Outstanding Principal Amount" means (a) on any date of determination prior
to the Commitment Termination Date, the sum of (x) (i) the aggregate original
principal amount of all SENs which have been issued prior to such date (other
than any series, together with any related subordinated secured obligations,
which have
 
                                       95
<PAGE>   98
 
been paid in full prior to such date of determination) minus (ii) the aggregate
principal amount of such SENs which have been permanently optionally redeemed as
of such date (such (i) minus (ii) hereinafter referred to as the "SENs Amount")
and (y) the aggregate principal amount of loans outstanding under the Credit
Facility, and (b) on any date of determination thereafter, the sum of (x) the
SENs Amount on such date of determination and (y) (i) the aggregate principal
amount of loans outstanding under the Credit Facility on the Commitment
Termination Date minus (ii) the aggregate principal amount of such loans
permanently optionally prepaid or permanently mandatorily prepaid as a result of
the issuance of SENs or Additional Secured Obligations subsequent to such date;
provided that from and after the date that the loans under the Credit Facility,
together with all related subordinated secured obligations, have been repaid in
full, the amount under this clause (y) shall be equal to zero.
 
     "Paying Agent" means any Person authorized by the Company to pay the
principal of or Additional Amounts, if any, or interest on or premium, if any,
on any SENs on behalf of the Company.
 
     "Payment Date" means the 30th day of each month (or the 28th day of
February), or if such day is not a Business Day, the next Business Day.
 
     "Permitted Liens" means (i) Liens existing on the date of the Indenture;
(ii) Liens securing loans from or guaranteed or insured by export credit,
governmental, bilateral or multilateral agencies; (iii) Liens for taxes,
assessments, governmental charges, other governmental obligations or levies or
statutory Liens for sums not yet due or being contested in good faith; (iv)
Liens to secure the purchase price of property or assets acquired by the Issuer
or the Guarantor or any of their Subsidiaries after the date of the Indenture,
or to secure Debt incurred solely to finance the acquisition of property or
assets acquired by the Guarantor or the Issuer or any of their Subsidiaries
after the date of the Indenture; provided, however, that such Lien is limited to
the property or assets financed, secures Debt in an amount not in excess of the
purchase price of such property or assets, and is created within 180 days of the
acquisition of such property or assets; (v) any Lien on any property or assets
of an entity that becomes a Subsidiary of the Guarantor or the Issuer, or on any
property or assets acquired by the Guarantor, the Issuer or any of their
Subsidiaries that exists prior to such entity becoming a Subsidiary or such
acquisition and that was not created in contemplation thereof; (vi) any Lien
created to secure Debt incurred to finance the cost (including capitalized
interest) of construction, acquisition, improvement or development of specific
property or assets; provided that such Lien is restricted solely to the specific
property or assets constructed or acquired or the specific improvement or
development and secures Debt in an amount not in excess of the financed cost of
such property or assets; (vii) replacements, renewals or extensions of the Liens
permitted pursuant to clauses (i) through (vi) above, so long as (A) the
principal amount is not increased over the original principal amount and (B)
such Liens do not extend to any additional property or assets; (viii) any Lien
incurred in the ordinary course of business in connection with social security,
workers' compensation, unemployment insurance and similar types of laws or
regulations; (ix) any statutory Lien of a landlord, carrier, warehouseman,
mechanic or materialman incurred in the ordinary course of business for a sum
not yet due or the payment of which is being contested in good faith; (x) Liens
to secure the performance of bids, trade contracts, leases, statutory
obligations, surety and appeal bonds, performance bonds and other obligations of
a similar nature, in each case incurred in the ordinary course of business; (xi)
other Liens securing Debt that in the aggregate at any time does not exceed an
amount equal to 10% of (A) the total assets of the Guarantor as reported on the
most recent quarterly financial statements of the Guarantor minus (B) the
aggregate amount of Debt secured by Liens permitted under clauses (ii) and (vi)
above; and (xii) any Lien securing a judgment, unless (A) the judgment it
secures shall not have been discharged within 60 days after the entry thereof,
or (B) execution of the judgment it secures shall not have been discharged
within 60 days after the expiration of any stay thereof pending appeal.
 
     "Person" means any individual, corporation, partnership, joint venture,
association, joint-stock company, trust, unincorporated organization or
Governmental Authority.
 
     "Potential Trigger Event" means any event which is, or after notice or
passage of time or both, would be, a Trigger Event other than an event specified
in clause (x) of "-- Trigger Events" which occurs prior to the 180th day after
the date of the Indenture.
 
     "Principal Property" means, the collective reference to the Toquepala Mine,
the Cuajone Mine, the Ilo Smelter and the Ilo Refinery.
 
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<PAGE>   99
 
     "Property" means any asset, revenue or any other property, whether tangible
or intangible, real or personal, including, without limitation, any right to
receive income.
 
     "Qualified Letter of Credit" means an irrevocable letter of credit issued
in favor of the Trustee by a depository institution or trust company, which has
a credit rating with respect to its short-term U.S. dollar unsecured obligations
of at least "A-1" from Standard & Poor's and "P-1" from Moody's and at least
"D-1" from Duff & Phelps, if rated by Duff & Phelps, and allowing the Trustee,
upon presentation of a sight draft, to make drawings under such letter of
credit.
 
     "Realization Event" means a foreclosure upon all or any portion of the
Collateral or a sale or other disposition of all or any portion of the
Collateral pursuant to the Amended and Restated Collateral Trust Agreement.
 
     "Receivable" means the existing or future indebtedness and payment
obligations of a Person arising from the sale of Copper and shall include the
right to payments of any interest, taxes, finance charges or late charges and
other obligations of such Person with respect thereto.
 
     "Required Balance" means, as of any date, an amount equal to the aggregate
Scheduled Debt Service for the Notes with respect to the three next succeeding
calendar months.
 
     "Required Secured Parties" means the collective reference to (i) the
Required Lenders (as defined under the Credit Facility) and (ii) the holders of
at least 51% of the outstanding principal amount of all series of SENs and (iii)
the requisite percentage of holders of any Additional Secured Obligations (which
are not held by the Company or an affiliate thereof) for taking actions or
giving directions following events of default, provided that the term "Required
Secured Parties" shall not include any class of Secured Parties described in
clauses (i), (ii) or (iii) above if the aggregate outstanding principal amount
of all Senior Secured Obligations of such class of Secured Parties constitutes
less than 10% of the aggregate outstanding principal amount of all Senior
Secured Obligations of all such classes and provided further that following
payment in full of all Senior Secured Obligations, "Required Secured Parties"
shall mean the holders of at least 51% of the aggregate outstanding principal
amount of all subordinated secured obligations then outstanding.
 
     "Retention Trigger Event" means the occurrence of a Trigger Event specified
in clauses (i), (ii), (iii), (iv), (ix) or (xi) of "Trigger Events" or any other
Trigger Event which has become a Blocking Event.
 
     "Scheduled Debt Service" means, as of any date of determination and in
relation to any period of time, the sum of all interest and principal payments
scheduled to be made by the Issuer for such period of time based on the
principal amount of Notes outstanding on such date.
 
     "Secured Parties" means:
 
          (i) so long as any lender has any commitment to make loans or other
     extensions of credit under the Credit Facility or any amount is payable by
     the Issuer under the Credit Facility, the lenders and the agents under the
     Credit Facility;
 
          (ii) so long as any amount is payable by the Issuer under the
     Indenture or any series of SENs, the Holders of such series of SENs and the
     Trustee;
 
          (iii) so long as any amount is payable by the Issuer under the
     Collateral Trust and Security Agreement, the Collateral Trustee;
 
          (iv) so long as any amount is payable by the Issuer in respect of any
     Additional Secured Obligation, the holder or holders of such Additional
     Secured Obligation; and
 
          (v) so long as any amount is payable by the Issuer in respect of any
     subordinated secured obligation, the holder or holders of such subordinated
     secured obligation.
 
     "SENs Basic Collateral Percentage" means, on any day, a percentage equal to
a fraction, the numerator of which shall be (a) the original principal amount of
SENs issued under such series of SENs minus (b) the aggregate principal amount
of SENs that have been permanently optionally redeemed (to the extent that the
sum of the aggregate principal amount so redeemed plus the aggregate principal
amount of all scheduled principal payments (after giving effect to any reduction
in such scheduled payments as a result of such redemption) made prior to such
time exceeds the aggregate principal payments originally scheduled to have been
made by such time) as of such date and the denominator of which shall be the
Program Amount then in effect.
 
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<PAGE>   100
 
     "SENs Collateral" means, with respect to the SENs of any series, the
collateral in which a security interest is granted to the Trustee in favor of
the holders of such series pursuant to the Supplemental Indenture with respect
to the SENs of such series.
 
     "SENs Collateral Account" means a segregated trust account denominated in
Dollars established and maintained by the Trustee for each series of SENs for
the benefit of the holders of such series of SENs into which monies will be
deposited and from which monies will be withdrawn as provided in the Indenture.
 
     "SENs Secured Obligations" means any and all of the debts, obligations and
liabilities of the Issuer to the holders of SENs of any series or the Trustee
provided for or arising under the SENs or the Indenture, whether now existing or
hereafter arising, voluntary or involuntary, direct or indirect, absolute or
contingent, liquidated or unliquidated, and whether or not from time to time
decreased or extinguished and later increased, created or incurred (including,
without limitation, interest accruing at the then applicable rate provided in a
Supplemental Indenture for any series of SENs and interest accruing at the then
applicable rate provided in such Supplemental Indenture after the filing of any
petition in bankruptcy, or the commencement of any insolvency reorganization or
like proceeding, relating to the Issuer, whether or not a claim for post-filing
or post-petition interest is allowed in such proceeding) which may arise under,
out of, or in connection with the SENs, the Indenture or any other document
made, delivered or given in connection therewith, in each case whether on
account of principal, interest, reimbursement obligations, fees, indemnities,
costs, expenses or otherwise (including, without limitation, all fees and
disbursements of counsel that are required to be paid by the Issuer pursuant to
the terms of any of the foregoing agreements).
 
     "SENs Total Collateral Percentage" means, at any time, the percentage
interest in the Collateral equal to the sum of all series Total Collateral
Percentages for all outstanding series of SENs at such time.
 
     "Senior Secured Obligations" means the collective reference to the Credit
Facility Secured Obligations, the SENs Secured Obligations and the Additional
Secured Obligations.
 
     "Series Total Collateral Percentage" means, at any time with respect to
each series of SENs, the percentage interest in the Collateral of the holders of
the Notes of such series, which percentage shall be equal to the SENs Basic
Collateral Percentage for such series at such time plus the Additional
Percentage applicable to such series, if any, at such time.
 
     "Six Month Debt Reserve Amount" has the meaning set forth in " -- Cure of
Trigger Events".
 
     "Six Month Debt Service Coverage Ratio" means (a) 1.75 to 1.00, with
respect to any six month period when the Outstanding Principal Amount is less
than or equal to $300 million on the last day of such six month period; (b) 2.00
to 1.00, with respect to any six month period when the Outstanding Principal
Amount is greater than $300 million but less than or equal to $500 million on
the last day of such six month period; or (c) 2.25 to 1.00, with respect to any
six month period when the Outstanding Principal Amount is greater than $500
million on the last day of such six month period.
 
     "Six Month Ratio" has the meaning set forth in "--Trigger Events".
 
     "Subsidiary" means, as to any Person, a corporation, partnership or other
entity of which shares of stock or other ownership interests having ordinary
voting power (other than stock or such other ownership interests having such
power only by reason of the happening of a contingency) to elect a majority of
the board of directors or other managers of such corporation, partnership or
other entity are at the time owned, or the management of which is otherwise
controlled, directly or indirectly through one or more intermediaries, or both,
by such Person. Unless otherwise qualified, all references to a "Subsidiary" or
to "Subsidiaries" herein shall refer to Subsidiaries of SPCC.
 
     "Three Month Debt Service Coverage Ratio" means (a) 1.5 to 1.00, with
respect to any three month period when the Outstanding Principal Amount is less
than or equal to $300 million on the last day of such period; (b) 1.75 to 1.00,
with respect to any three month period when the Outstanding Principal Amount is
greater than $300 million but less than or equal to $500 million on the last day
of such period; or (c) 2.00 to 1.00, with respect to any three month period when
the Outstanding Principal Amount is greater than $500 million on the last day of
such period.
 
     "Three Month Ratio" has the meaning set forth in "-- Trigger Events".
 
                                       98
<PAGE>   101
 
     "Total Collateral Percentage" means any of the SENs Total Collateral
Percentage, the Credit Facility Total Collateral Percentage and the Designated
Total Collateral Percentage.
 
     "Transaction Documents" means the Amended and Restated Collateral Trust
Agreement, the Indenture, including the Supplemental Indenture, the Notes and
the Guarantee endorsed thereon and any other document or agreement pursuant to
which a Lien is granted on any Collateral in connection with the Amended and
Restated Collateral Trust Agreement, the Indenture and the Supplemental
Indenture.
 
     "Transfer Agent" means any Person authorized by the Company to effectuate
the exchange or transfer of any SEN on behalf of the Company.
 
     "Trust Indenture Act" or "TIA" means the Trust Indenture Act of 1939 as in
force at the date as of which the Indenture was executed, except, as provided in
Section 1005 of the Original Indenture, if the TIA is amended hereafter, to the
extent required, TIA means the TIA as so amended.
 
CERTAIN BOOK-ENTRY PROCEDURES FOR GLOBAL NOTES
 
     The descriptions of the operations and procedures of The Depository Trust
Company ("DTC") that follow are provided solely as a matter of convenience.
These operations and procedures are solely within the control of DTC and are
subject to changes by it from time to time. The Company takes no responsibility
for these operations and procedures and urges investors to contact DTC or its
Participants (as defined below) directly to discuss these matters.
 
     DTC has advised the Issuer as follows: DTC is a limited-purpose trust
company organized under the New York Banking Law, a "banking organization"
within the meaning of the New York Banking Law, a member of the Federal Reserve
System, a "clearing corporation" within the meaning of the Uniform Commercial
Code and a "clearing agency" registered pursuant to the provisions of Section
17A of the Exchange Act. DTC was created to hold securities for institutions
that have accounts with DTC or its nominee ("Participants") and facilitate the
clearance and settlement of securities transactions between Participants through
electronic book-entry changes in accounts of its Participants, thereby
eliminating the need for physical movement of certificates. Participants include
securities brokers and dealers, banks, trust companies and clearing corporations
and may include certain other organizations. Indirect access to the DTC system
is available to others such as banks, brokers, dealers and trust companies that
clear through or maintain a custodial relationship with a Participant, either
directly or indirectly. Persons who are not participants may beneficially own
securities held by DTC only through Participants.
 
   
     The New Notes will be represented by one or more notes in registered,
global form without interest coupons (collectively, the "Global New Notes"). New
Notes shall be issued in an Authorized Denomination. The Global New Notes will
be deposited upon issuance with the Trustee as custodian for DTC in New York,
New York, and registered in the name of DTC, or its nominee, in each case, for
credit to an account of a direct or indirect Participant in DTC as described
below.
    
 
     Upon issuance of a Global New Note, DTC will credit, on its book-entry
registration and transfer system, the respective principal amounts of the New
Notes represented by such Global New Note to the accounts of Participants. The
accounts to be credited will be designated by the Initial Purchaser. Ownership
of beneficial interests in such Global New Note will be limited to Participants
or persons that may hold beneficial interests through Participants. Ownership of
beneficial interests in such Global New Note will be shown on, and the transfer
of those ownership interests will be effected only through, records maintained
by DTC (with respect to Participants' interests) and such Participants (with
respect to the owners of beneficial interests held through Participants in such
Global New Note, including Euroclear and Cedel).
 
     So long as DTC, or its nominee, is the registered holder and owner of such
Global New Note, DTC or such nominee, as the case may be, will be considered the
sole owner and holder of the New Notes represented by such Global New Note for
all purposes of such New Notes and for all purposes under the Indenture. Except
as set forth below, owners of beneficial interests in a Global New Note will not
be entitled to have the New Notes represented by such Global New Note registered
in their names, will not receive or be entitled to receive delivery of New
 
                                       99
<PAGE>   102
 
Notes in certificated form and will not be considered to be the owners or
holders thereof under the Indenture or such Global New Note.
 
EXCHANGES OF BOOK-ENTRY NOTES FOR CERTIFICATED NOTES
 
     Beneficial interests in a Global Note will be exchangeable or transferable,
as the case may be, for New Notes in certificated form (collectively, the
"Certificated New Notes") if (i) DTC notifies the Issuer that it is unwilling or
unable to continue as depositary for such Global New Note, or (ii) DTC ceases to
be a "Clearing Agency" registered under the Exchange Act, and a successor
depositary is not appointed by the Issuer within 90 days, (iii) a Trigger Event,
Accelerated Amortization Event or Event of Default has occurred and is
continuing with respect to such Notes or (iv) such exchange is necessary as
provided under "Description of Notes -- Optional Redemption for Tax Reasons".
Upon the occurrence of any of the events described in the preceding sentence,
the Issuer will cause the appropriate Certificated New Notes to be delivered to
the owners of beneficial interests in the Global New Note. Persons exchanging
interests in a Global New Note for Certificated New Notes will be required to
provide the Trustee with written instruction and other information required by
the Issuer and the Trustee to complete, execute and deliver such Certificated
New Notes. In all cases, Certificated New Notes delivered in exchange for any
Global New Note or beneficial interests therein will be registered in the names,
and issued in any approved denominations, requested by DTC.
 
     Certificated Notes will not be eligible for clearing and settlement through
Euroclear, Cedel or DTC.
 
                REGISTRATION RIGHTS AGREEMENT; SPECIAL INTEREST
 
     The following description of the Registration Rights Agreement is qualified
in its entirety by reference to the Registration Rights Agreement.
 
     Holders of New Notes are not entitled to any registration rights with
respect to the New Notes. Holders of Old Notes are entitled to certain
registration rights under the Registration Rights Agreement. Pursuant to the
Registration Rights Agreement, SP Limited and SPCC have agreed to file with the
Commission and have declared effective on or prior to November 26, 1997 a
registration statement (the "Exchange Offer Registration Statement") under the
Securities Act with respect to the Exchange Offer. The Issuer also agreed that,
after the effectiveness of the Exchange Offer Registration Statement, it would,
subject to certain conditions, offer to the holders of Old Notes who are able to
make certain representations the opportunity to exchange their Old Notes for New
Notes, which will be subject to restrictions on transferability. In the event
that applicable interpretations of the staff of the Commission do not permit the
Issuer to effect the Exchange Offer ("Commission Blockage") or do not permit any
holder of Old Notes, subject to certain limitations, to participate in such
Exchange Offer, the Issuer has agreed to file with the Commission a shelf
registration statement (the "Shelf Registration Statement") to cover resales of
the applicable Old Notes. The Registration Statement of which this Prospectus is
a part constitutes the Exchange Offer Registration Statement.
 
     The Registration Rights Agreement provides that the Issuer will use its
reasonable best efforts to have the Exchange Offer Registration Statement (and,
if applicable, a Shelf Registration Statement) declared effective under the
Securities Act by the 180th day after the Issue Date. If neither the Exchange
Offer is consummated nor, if required in lieu thereof, the Shelf Registration
Statement is declared effective by December 30, 1997 (unless there exists a
Commission Blockage) (such event, a "Registration Default"), the Company will be
required to pay to each Holder of Old Notes, accruing from the date of the first
such Registration Default (or if such Registration Default has been cured, from
the date of the next Registration Default) to the date such Registration Default
has been cured, special interest ("Special Interest") at a rate per annum equal
to 0.5% of the principal amount of the Old Notes held by such holder. All
accrued Special Interest will be paid by the Company in arrears on each monthly
Payment Date in the same manner as regular monthly interest. Following the cure
of all Registration Defaults, the accrual of Special Interest will cease,
provided that if a registration statement or Shelf Registration Statement
referred to above has not been declared effective by the second anniversary of
the Issue Date, Special Interest will accrue until the Notes are repaid.
 
                                       100
<PAGE>   103
 
     Each broker-dealer that receives New Notes for its own account in exchange
for Old Notes where such Old Notes were acquired by such broker-dealer as a
result of market-making activities must acknowledge that it will deliver a
prospectus in connection with any resale of New Notes. Under the Registration
Rights Agreement, the Company is required to allow participating broker-dealers
and other persons, if any, subject to such prospectus delivery requirements to
use this Prospectus contained in the Exchange Offer Registration Statement in
connection with the resale of such New Notes; provided however that the Company
is only required to use its best efforts to maintain the effectiveness of the
Exchange Offer Registration Statement for a period of 90 days following the
closing of the Exchange Offer.
 
     Each holder who wishes to exchange Old Notes for New Notes in the Exchange
Offer will be required to make certain representations, including that (i) it is
not an "affiliate", as defined in Rule 405 under the Securities Act of the
Company or if it is an "affiliate", such holder will comply with the
registration and prospectus delivery requirements of the Securities Act to the
extent applicable, (ii) if such holder is not a broker-dealer, that it is not
engaged in, and does not intend to engage in, the distribution of the New Notes
and (iii) if such Holder is a broker-dealer, that it will receive New Notes for
its own account in exchange for Old Notes that were acquired as a result of
market-making activities or other ordinary course trading activities and that it
will be required to acknowledge that it will deliver a prospectus in connection
with any resale of such New Notes, (iv) any New Notes to be received by it were
acquired in the ordinary course of its business and (v) at the time of
consummation of the Exchange Offer, it has no arrangements or understanding with
any Person to participate in the distribution of the New Notes in violation of
the provisions of the Securities Act.
 
                         DESCRIPTION OF CREDIT FACILITY
 
     The following summary of certain provisions of the Credit Facility is
qualified in its entirety by reference to the Credit and Guarantee Agreement
dated as of March 31, 1997, as amended by the First Amendment thereto, dated as
of July 14, 1997.
 
     On March 31, 1997, the Company entered into a definitive credit agreement
for the Credit Facility with a syndicate of banks to provide up to $400 million
in term loans and $200 million in revolving loans. Under the terms of the Credit
Facility, the $400 million term loan portion will be available for drawdown for
a period of four years, and will be amortized in equal quarterly installments
over the following three years. The $200 million revolving loan portion will be
available for a period of four years on a fully revolving basis and will be
amortized in equal quarterly installments over the following three years. The
Credit Facility will be guaranteed on a pari passu basis with the Notes and any
other issuances of SENs by SPCC, and will be secured by a security interest in
favor of the Collateral Trustee in a percentage of the Export Receivables and
the Collections therefrom. The percentage of the Collateral assigned to secure
the Credit Facility will be equal to the Credit Facility Basic Collateral
Percentage at such time plus the Additional Percentage applicable to the Credit
Facility, if any, at such time. The Credit Facility is also secured by interests
in the Credit Facility Collateral Account and Credit Facility Reserve Account.
In the absence of an event of default under the Credit Facility or the
occurrence and continuance of a Blocking Event under the Notes or any subsequent
series of SENs, amounts remaining in the Credit Facility Collateral Account
after payment of overdue fees and expenses of the Collateral Agent and the
Administrative Agent and deposits to the Credit Facility Reserve Account will be
released daily to the Company.
 
     Under the Credit Facility, SPCC has covenanted that it will not permit its
Consolidated Tangible Net Worth to be less than $750 million. Also, SPCC will
not permit its ratio of debt to equity (as defined in the Credit Facility loan
documentation) to exceed 0.50 to 1.00. At the end of any two consecutive fiscal
quarters, SPCC will not permit the ratio of EBITDA (earnings before interest,
taxes, depreciation and amortization, as defined in the Credit Facility loan
documentation) to interest coverage to be less than 1.50 to 1.00 for the most
recent four consecutive fiscal quarters. Neither SPCC nor SP Limited will permit
the aggregate Collections transferred to the Credit Facility Collateral Account
in any fiscal quarter to be less than the product of 1.5 and the scheduled
Credit Facility debt service for such fiscal quarter; provided that if aggregate
Collections are insufficient to meet the foregoing requirement, SP Limited may
(i) designate an additional percentage security interest in the Export
Receivables and the Collections therefrom to be thereafter transferred to the
Credit Facility Collateral Account in an amount sufficient to cure any shortfall
or (ii) prepay the loans under the Credit Facility.
 
                                       101
<PAGE>   104
 
     The Credit Facility documentation provides that neither SPCC nor SP Limited
will permit liens, other than permitted liens (as defined in the Credit Facility
loan documentation), to exist on the Principal Properties, the Export
Receivables or the copper inventory. In addition, SPCC and SP Limited have
agreed that neither will dispose of the Principal Properties and have agreed to
a limitation on dividends.
 
     Events of default under the Credit Facility are: failure to pay principal
when due or interest within five business days of the due date, material
incorrectness of a representation or warranty when made, covenant default and in
certain cases default after notice and applicable grace periods, entry of a
non-appealable judgment against SPCC or its Subsidiaries of more than $50
million, commencements of proceedings in bankruptcy by or against SPCC or a
Material Subsidiary or the Branch, default in payment, or the acceleration of
any indebtedness provided that the aggregate amount of indebtedness outstanding
shall be in excess of $30 million (other than the occurrence of an Accelerated
Amortization Event under the Notes), expropriation by a Peruvian Governmental
Authority of all or substantially all of the assets of SPCC or SP Limited
without adequate compensation, failure to deliver notices to customers in
respect of Export Receivables with the intent to avoid the security arrangements
relating to the Credit Facility, cessation of liens in respect of a material
portion of the collateral securing the Credit Facility and the failure of Asarco
to hold, directly or indirectly, more than 50% of the voting interests of SPCC
and SP Limited.
 
     Upon the occurrence of an event of default under the Credit Facility, the
Required Lenders (representing 66 2/3% of the outstanding principal and
commitments under the Credit Facility) may terminate the commitments, accelerate
the loans and the Collateral Agent shall retain Blocked Collections in the
Credit Facility Collateral Account for a period of 30 days, after which the
Collateral Agent shall release such Blocked Collections and cease to retain any
further Collections unless directed by the Required Lenders to do so. The term
"Blocked Collections" is defined in the Credit Facility documentation as it is
defined in the Notes. See "Description of Notes -- Certain Definitions".
 
     The Credit Facility also provides that, upon the occurrence of a Blocking
Event under the Notes, or any subsequent series of SENs, the Collateral Agent,
on behalf of the lenders, will retain Blocked Collections in the Credit Facility
Collateral Account during the pendency of such Blocking Event. Upon the cure of
the Blocking Event or the release or application, in accordance with the
Indenture, of the retained Blocked Collections, the Collateral Agent, so long as
no default or event of default under the Credit Facility then exists, will
release to the Company any Blocked Collections retained in the Credit Facility
Collateral Account and will cease retaining any Blocked Collections in that
account as a result of such Blocking Event.
 
     Upon the issuance of SENs and any other debt in an amount exceeding in the
aggregate $150 million, the commitments under the Credit Facility will be
reduced by a corresponding amount and/or the Credit Facility loans will be
prepaid, with the term loan commitments being reduced first.
 
     SP Limited has the option to prepay amounts drawn under the Credit Facility
at any time in amounts of at least $10 million and to specify whether repayments
will be applied to the term loan or the revolving loan portion of the Credit
Facility. In the event of a mandatory prepayment of amounts drawn under the
Credit Facility, which may arise as a result of either (i) an Accelerated
Amortization Event under the Notes or any subsequent series of SENs or (ii) an
acceleration of other indebtedness secured by a portion of the Export
Receivables, amounts drawn under the Credit Facility will be repaid, and, if
necessary, commitments will be reduced, to the extent necessary such that the
Outstanding Program Percentage (as defined under the Credit Facility), after
giving effect to any mandatory prepayment, is equal to the Outstanding Program
Percentage (as defined below) prior to giving effect to such mandatory
prepayment. "Outstanding Program Percentage" means, at any time, the percentage
which the aggregate principal amount of loans then outstanding under the Credit
Facility then constitutes of the sum of the principal amount outstanding under
the Credit Facility and all series of SENs and any other indebtedness secured by
the Export Receivables.
 
     Funds drawn down under the Credit Facility will be used by the Company for
the expansion and modernization program and for general corporate purposes.
 
                                       102
<PAGE>   105
 
                                 EXCHANGE RATES
 
     During the last two decades, the Peruvian government has imposed various
exchange controls ranging from strict control over exchange rates to market
determination of rates. Prior to early 1991, the Peruvian foreign exchange
market consisted of multiple exchange rates. Since early 1991, there have been
no exchange controls in Peru and all foreign exchange transactions are based on
free market exchange rates. Current Peruvian regulations on foreign investment
allow foreign investors to receive and repatriate all earnings and investments
in Peru. Investors are allowed to purchase foreign currency at free market
exchange rates through any member of the Peruvian banking system and transfer
such foreign currency outside Peru without restriction.
 
     A portion of the Company's operating costs are denominated in Soles. Since
the revenues of the Company are primarily denominated in Dollars, when inflation
in Peru is not offset by a corresponding devaluation of the Sol versus the
Dollar, the financial position, results of operations and cash flows of the
Company will be affected. See "Management's Discussion and Analysis of Financial
Condition and Results of Operations -- Overview". The Company has not in the
past entered into, and does not currently contemplate entering into, any foreign
exchange hedging arrangements.
 
     The following table sets forth the high and low month-end rates, the daily
average rates and the end-of-period rates for the sale of Soles for U.S. dollars
for the periods indicated.
 
                                 EXCHANGE RATES
                                (SOLES PER US$)
 
   
<TABLE>
<CAPTION>
                                                                             DAILY       END OF
              YEAR ENDED DECEMBER 31,             HIGH(1)      LOW(1)      AVERAGE(2)   PERIOD(3)
    -------------------------------------------  ---------    ---------    ---------    ---------
    <S>                                          <C>          <C>          <C>          <C>
    1992.......................................   S/.1.680     S/.0.950     S/.1.249     S/.1.640
    1993.......................................      2.180        1.640        1.990        2.160
    1994.......................................      2.270        2.050        2.196        2.190
    1995.......................................      2.350        2.180        2.255        2.322
    1996.......................................      2.603        2.322        2.454        2.603
    1997 (through October 2)...................      2.675        2.603        2.650        2.640
</TABLE>
    
 
- ---------------
(1) Highest and lowest of the daily closing exchange rates for each year based
    on the offered rate.
 
(2) Average of daily exchange rates based on the offered rate.
 
(3) End of period exchange rates based on the offered rate.
 
Source: Superintendencia de Banca y Seguros.
 
   
     The average of the bid and offered exchange market rates published by the
Superintendencia de Banca y Seguros for October 2, 1997 was S/2.638 per US$1.00.
    
 
                             CERTAIN LEGAL MATTERS
 
  Effects of U.S. Bankruptcy Law
 
     The principal collateral for the Notes is the percentage security interest
in favor of the Collateral Trustee for the benefit of the holders of Notes in
the Export Contracts and Export Receivables to be generated in the future from
time to time. The amount of Export Receivables in existence at any time in which
the Notes will have a percentage security interest will only represent a small
portion of the Program Amount. In addition, under Section 552 of the Bankruptcy
Code, assets that are acquired by a debtor in a U.S. bankruptcy proceeding after
the commencement of bankruptcy proceedings are not subject to a security
interest created by such debtor before such commencement unless such assets
constitute "proceeds, product, offspring, or profits of such property," in which
case such assets would be subject to the security interest except to the extent
that the bankruptcy court, after notice and a hearing and based on the equities
of the case, orders otherwise. As a result, even if Export Receivables continue
to be generated after the commencement of U.S. bankruptcy proceedings involving
SP
 
                                       103
<PAGE>   106
 
Limited, it is unlikely that such Export Receivables will be subject to the
security interest in favor of the Collateral Trustee on behalf of holders of
Notes or any other Secured Party.
 
     Under the terms of the Amended and Restated Collateral Trust Agreement, the
Collateral Trustee would have the right, and would be required in certain
circumstances, to sell the Collateral in order to pay the principal of, and
accrued interest on, the Notes and debt held by other Secured Parties. However,
upon the commencement of bankruptcy proceedings in which SP Limited is a debtor,
the Collateral Trustee will be stayed from foreclosing upon and selling the
Collateral. Even if the Collateral Trustee were able to exercise its remedies,
in light of the foregoing discussion of the scope of the security interest, it
is likely the proceeds allocable to the Notes from the sale of the Collateral
would not be sufficient to pay the aggregate outstanding principal balance of
the Notes plus accrued interest. In any plan of reorganization or liquidation
under the Bankruptcy Code, secured creditors are entitled to receive their
collateral or other consideration that provides the equivalent thereof. However,
the Trustee's claim on behalf of the holders of Notes, to the extent not covered
by the Collateral, would be unsecured and would rank pari passu in priority of
payment with all other senior unsecured creditors of the Company (subject to
certain statutory preferences) and the amount, if any, recoverable in respect of
such claim, as with other unsecured debt obligations of SP Limited, would depend
upon the outcome of the U.S. bankruptcy proceeding.
 
  Enforceability of Judgments under Peruvian Law
 
     Substantially all of the assets of SP Limited are located in Peru and are
held by the Branch in Peru. In the event that the holders were to obtain a
judgment in the United States against SP Limited or SPCC and seek to enforce
such judgment in Peru, the holders' ability to enforce the judgment in Peru
would be subject to Peruvian laws regarding enforcement of foreign judgments. In
general, Peruvian law provides that a judgment of a competent court outside of
Peru rendered against SP Limited or SPCC in connection with an action arising
out of or relating to the Notes or the other Transaction Documents, would be
recognized and could be enforced against the assets of the Branch in Peru,
subject to the following statutory limitations set forth in the Peruvian civil
code: (i) the judgment must not resolve matters for which exclusive jurisdiction
of Peruvian courts applies (i.e., disputes relating to real estate located in
Peru); (ii) the competence of the foreign court which issued the judgment must
be recognized by Peruvian conflict of laws rules; (iii) the party against whom
the judgment was obtained must have been properly served in connection with the
foreign proceedings; (iv) the judgment of the foreign court must be a final
judgment, not subject to any further appeal; (v) no pending proceedings may
exist in Peru among the same parties and on the same subject; (vi) the judgment
by the foreign court cannot be in violation of public policy; and (vii) the
foreign court must grant reciprocal treatment to judgments issued by Peruvian
courts.
 
     Moreover, there can be no assurance that a judgment rendered against SP
Limited or SPCC in the United States in a bankruptcy-related action would be
enforceable against the assets of the Branch in Peru or that a Peruvian court
would not assert jurisdiction in any bankruptcy proceeding relating to SP
Limited.
 
                                       104
<PAGE>   107
 
                                    TAXATION
 
UNITED STATES TAXATION
 
     In the opinion of Davis Polk & Wardwell, tax counsel to the Company, the
following summary accurately describes certain principal United States federal
income and estate tax consequences of (i) the exchange of Old Notes for New
Notes pursuant to the Exchange Offer and (ii) the ownership and disposition of
the New Notes, to initial holders that will be exchanging Old Notes for New
Notes pursuant to the Exchange Offer and that purchased Old Notes at the first
price at which a substantial amount of the Old Notes was sold to the public (not
including bond houses, brokers or similar persons or organizations acting in the
capacity of underwriters, placement agents or wholesalers) for money. This
summary is based on the Internal Revenue Code of 1986, as amended to the date
hereof (the "Code"), administrative pronouncements, judicial decisions and
existing and proposed Treasury Regulations, changes to any of which subsequent
to the date of this Prospectus may affect the tax consequences described herein.
This summary discusses only New Notes held as capital assets within the meaning
of Section 1221 of the Code. It does not discuss all of the tax consequences
that may be relevant to a holder in light of his particular circumstances or to
holders subject to special rules, such as certain financial institutions,
insurance companies, dealers in securities or certain U.S. expatriates. Persons
considering the Exchange Offer should consult their tax advisers with regard to
the application of United States federal income and estate tax law to their
particular situations as well as any tax consequences arising under the laws of
any state, local or foreign taxing jurisdiction.
 
     As used herein, the term "United States Holder" means an owner of a New
Note that is, for United States federal income tax purposes, (i) a citizen or
resident of the United States, (ii) a corporation or partnership created or
organized in or under the laws of the United States or of any political
subdivision thereof, or (iii) an estate or trust the income of which is subject
to United States federal income taxation regardless of its source. The term also
includes certain former citizens and long-term residents of the United States.
 
     As used herein, the term "United States Alien Holder" means an owner of a
New Note that is, for United States federal income tax purposes, (i) a
nonresident alien individual, (ii) a foreign corporation, (iii) a nonresident
alien fiduciary of a foreign estate or trust or (iv) a foreign partnership one
or more of the members of which is, for United States federal income tax
purposes, a nonresident alien individual, a foreign corporation or a nonresident
alien fiduciary of a foreign estate or trust.
 
Tax Consequences of the Exchange Offer
 
     The exchange of Old Notes for New Notes pursuant to the Exchange Offer will
not result in any federal income tax consequences to holders. When a holder
exchanges an Old Note for a New Note pursuant to the Exchange Offer, the holder
will have the same adjusted basis and holding period in the New Note as in the
Old Note immediately before the exchange.
 
Tax Consequences to United States Holders
 
  Payments of Interest
 
     Interest paid on a New Note will generally be taxable to a United States
Holder as ordinary interest income at the time it accrues or is received in
accordance with the United States Holder's method of accounting for federal
income tax purposes. Because the Old Notes were issued at par, the New Notes
will not generally be treated as bearing original issue discount for federal
income tax purposes.
 
     Interest paid by a United States corporation that meets the requirements of
Section 861(c) of the Code is sourced outside the United States. To meet these
requirements, at least 80% of the domestic corporation's gross income from all
sources for the three-year period ending with the close of the taxable year
preceding the year of the payment of such interest must have been "active
foreign business income" for purposes of Section 861(c). Because substantially
all of the Company's income is attributable to its operations in Peru, the
Company believes that it has met the 80% threshold for the three-year period
immediately preceding the Company's current tax year. Although the Company
expects to continue to meet the 80% threshold in its current tax year and in the
 
                                       105
<PAGE>   108
 
future, there can be no assurance that the Company will meet this threshold
throughout the term of the New Notes. If the Company continues to meet the 80%
threshold, interest paid on a New Note will constitute foreign source income.
 
     With respect to amounts of Peruvian tax imposed on interest payments on a
New Note, it is likely that no foreign tax credit will be available with respect
to such tax to the extent the Company pays the tax directly to the Peruvian tax
authority. As the Company currently intends to pay such tax directly (in
circumstances where the Company would otherwise be required to withhold and pay
Additional Amounts in respect of such tax), it is likely that no foreign tax
credit will be available with respect to such tax.
 
  Sale, Exchange or Retirement of the New Notes
 
     Upon the sale, exchange or retirement of a New Note, a United States Holder
will recognize taxable gain or loss equal to the difference between the amount
realized on the sale, exchange or retirement and such holder's adjusted tax
basis in the New Note. For these purposes, the amount realized does not include
any amount attributable to accrued interest on the New Note. Amounts
attributable to accrued interest are treated as interest as described under
"Payments of Interest" above. A United States Holder's adjusted tax basis in a
New Note will generally equal the cost of the Old Note to such holder, reduced
by any principal payments received by the holder. Gain or loss realized on the
sale, exchange or retirement of a New Note will be capital gain or loss.
 
  Backup Withholding and Information Reporting
 
     Certain noncorporate United States Holders may be subject to backup
withholding at a rate of 31% on payments of principal, premium and interest on,
and the proceeds of disposition of, a New Note. Backup withholding will apply
only if the holder (i) fails to furnish its Taxpayer Identification Number
("TIN") which, for an individual, would be his Social Security number, (ii)
furnishes an incorrect TIN, (iii) is notified by the Internal Revenue Service
that it has failed to properly report payments of interest and dividends or (iv)
under certain circumstances, fails to certify, under penalty of perjury, that it
has furnished a correct TIN and has not been notified by the Internal Revenue
Service that it is subject to backup withholding for failure to report interest
and dividend payments. United States Holders should consult their tax advisers
regarding their qualification for exemption from backup withholding and the
procedure for obtaining such an exemption if applicable.
 
     The amount of any backup withholding from a payment to a United States
Holder will be allowed as a credit against such holder's United States federal
income tax liability and may entitle such holder to a refund, provided that the
required information is furnished to the Internal Revenue Service.
 
  Tax Consequences to United States Alien Holders
 
     Under present United States federal income tax law, and subject to the
discussion below concerning backup withholding:
 
          (a) payments of principal and interest on the New Notes by the Company
     or any paying agent to any United States Alien Holder will not be subject
     to United States federal withholding tax, provided that, in the case of
     interest, (i) such holder does not own, actually or constructively, 10
     percent or more of the total combined voting power of all classes of stock
     of the Company entitled to vote, is not a controlled foreign corporation
     related, directly or indirectly, to the Company through stock ownership,
     and is not a bank receiving interest described in Section 881(c)(3)(A) of
     the Code and (ii) the statement requirement set forth in Section 871(h) or
     Section 881(c) of the Code has been fulfilled with respect to the
     beneficial owner, as discussed below;
 
          (b) a United States Alien Holder of a New Note will not be subject to
     United States federal income tax on gain realized on the sale, exchange or
     other disposition of such Note, unless (i) such holder is an individual who
     is present in the United States for 183 days or more in the taxable year of
     disposition, and either (a) such individual has a "tax home" (as defined in
     Code Section 911(d)(3)) in the United States (unless such gain is
     attributable to a fixed place of business in a foreign country maintained
     by such individual and has been subject to foreign tax of at least 10%) or
     (b) the gain is attributable to an office or
 
                                       106
<PAGE>   109
 
     other fixed place of business maintained by such individual in the United
     States or (ii) such gain is effectively connected with the conduct by such
     holder of a trade or business in the United States.
 
     Sections 871(h) and 881(c) of the Code require that, in order to obtain the
portfolio interest exemption from withholding tax described in paragraph (a)
above, either the beneficial owner of the New Note, or a securities clearing
organization, bank or other financial institution that holds customers'
securities in the ordinary course of its trade or business (a "Financial
Institution") and that is holding the New Note on behalf of such beneficial
owner, file a statement with the withholding agent to the effect that the
beneficial owner of the New Note is not a United States Holder. Under temporary
United States Treasury Regulations, such requirement will be fulfilled if the
beneficial owner of a New Note certifies on Internal Revenue Service Form W-8,
under penalties of perjury, that it is not a United States Holder and provides
its name and address, and any Financial Institution holding the New Note on
behalf of the beneficial owner files a statement with the withholding agent to
the effect that it has received such a statement from the holder (and furnishes
the withholding agent with a copy thereof).
 
     If a United States Alien Holder of a New Note is engaged in a trade or
business in the United States, and if interest on the New Note (or gain realized
on its sale, exchange or other disposition) is effectively connected with the
conduct of such trade or business, the United States Alien Holder, although
exempt from the withholding tax discussed in the preceding paragraph, will
generally be subject to regular United States income tax on such effectively
connected income in the same manner as if it were a United States person. In
lieu of the certificate described in the preceding paragraph, such a holder will
be required to provide properly executed Internal Revenue Service Form 4224 (or
successor form) to the withholding agent in order to claim an exemption from
withholding tax. In addition, if the United States Alien Holder is a foreign
corporation, it may be subject to a branch profits tax equal to 30% (or such
lower rate provided by an applicable treaty) of its effectively connected
earnings and profits for the taxable year, subject to certain adjustments. For
purposes of the branch profits tax, interest on and any gain recognized on the
sale, exchange or other disposition of a New Note will be included in the
effectively connected earnings and profits of the United States Alien Holder if
the interest or gain, as the case may be, is effectively connected with the
conduct by the United States Alien Holder of a trade or business in the United
States.
 
     Under Section 2105(b) of the United States federal estate tax law, a New
Note or coupon held by an individual who is not a citizen or resident of the
United States at the time of his death generally will not be subject to United
States federal estate tax as a result of such individual's death, provided that
the individual does not own, actually or constructively, 10 percent or more of
the total combined voting power of all classes of stock of the Company entitled
to vote and, at the time of such individual's death, payments with respect to
such New Note would not have been effectively connected to the conduct by such
individual of a trade or business in the United States.
 
  Backup Withholding and Information Reporting
 
     Under current United States federal income tax law, backup withholding tax
and information reporting requirements apply to certain payments of principal,
premium and interest made to, and to the proceeds of sale before maturity by,
certain noncorporate United States persons. Under current Treasury Regulations,
backup withholding will not apply to payments made on a New Note if the
certifications required by Sections 871(h) and 881(c) are received, provided in
each case that the Company or such paying agent, as the case may be, does not
have actual knowledge that the payee is a United States person.
 
     United States Alien Holders of New Notes should consult their tax advisers
regarding the application of information reporting and backup withholding in
their particular situations, the availability of an exemption therefrom, and the
procedure for obtaining such an exemption, if available. Any amounts withheld
from a payment to a United States Alien Holder under the backup withholding
rules will be allowed as a credit against such holder's United States federal
income tax liability and may entitle such holder to a refund, provided that the
required information is furnished to the United States Internal Revenue Service.
 
                                       107
<PAGE>   110
 
PERUVIAN TAXATION
 
     In the opinion of Estudio Aurelio Garcia Sayan, Peruvian tax counsel to the
Company, the following summary accurately describes certain principal Peruvian
income and estate tax consequences of (i) the exchange of Old Notes for New
Notes pursuant to the Exchange Offer and (ii) the ownership and disposition of
the New Notes, to holders not domiciled in Peru.
 
     The exchange of Old Notes for New Notes pursuant to the Exchange Offer will
not result in any Peruvian tax consequences to holders not domiciled in Peru.
 
     Under Peruvian tax law, payments of interest on a New Note to holders who
are "juridical persons" not domiciled in Peru will be subject to income tax in
Peru at a rate of 1%, unless the Company, as currently intended, pays such tax
directly to the Peruvian taxing authority. For Peruvian income tax purposes, a
juridical person not domiciled in Peru will include a corporation, a partnership
and a trust organized under the laws of the United States or any State thereof
and any corporation or other entity organized or established under the laws of
any other jurisdiction outside Peru. To the extent that the Company does not pay
this tax of 1% directly to the Peruvian taxing authority, the Company will
withhold such tax from payments of interest on the New Note and pay Additional
Amounts to holders that are "juridical persons" such that the net amounts
receivable by such holders after withholding at a rate of 1% will equal the
amounts that would have been receivable in the absence of such withholding,
subject to the limitations described in "Description of Notes -- Payments of
Additional Amounts". Payments of interest on the New Notes to holders that are
not "juridical persons" under Peruvian tax law and that are domiciled outside
Peru will be subject to income tax in Peru currently at a rate of 30%. The
Company currently intends to treat a holder of a New Note that is organized or
established under the laws of a jurisdiction outside Peru as a juridical person,
and to pay such 30% income tax by means of withholding with respect to payments
to any holder of a New Note whose name indicates that it is not a juridical
person. As a consequence, the Company will not pay any Additional Amounts to
individuals or estates.
 
     Interest paid on the New Notes will not be subject to any stamp, sales or
similar tax imposed by Peru.
 
     Capital gains realized by holders not domiciled in Peru on the disposition
of New Notes are not subject to tax in Peru.
 
     There are no Peruvian estate or personal property taxes applicable to the
ownership of the New Notes by a holder not domiciled in Peru.
 
                              PLAN OF DISTRIBUTION
 
     Each broker-dealer that receives New Notes for its own account pursuant to
the Exchange Offer must acknowledge that it will deliver a prospectus in
connection with any resale of such New Notes. This Prospectus, as it may be
amended or supplemented from time to time, may be used by a broker-dealer in
connection with resales of New Notes received in exchange for Old Notes where
such Old Notes were acquired as a result of market-making activities or other
trading activities. The Issuer has agreed that for a period of 90 days after the
consummation of the Exchange Offer it will make this Prospectus, as amended or
supplemented, available to any such broker-dealer for use in connection with any
such resale. The Issuer will not receive any proceeds from any sale of New Notes
by broker-dealers. New Notes received by broker-dealers for their own account
pursuant to the Exchange Offer may be sold from time to time in one or more
transactions in the over-the-counter market, in negotiated transactions, through
the writing of options on the New Notes or a combination of such methods of
resale, at market prices prevailing at the time of resale, at prices related to
such prevailing market prices or negotiated prices. Any such resale may be made
directly to purchasers or to or through brokers or dealers who may receive
compensation in the form of commissions or concessions from any such
broker-dealer and/or the purchasers of any such New Notes. Any broker-dealer
that resells New Notes that were received by it for its own account pursuant to
the Exchange Offer and any broker or dealer that participates in a distribution
of such New Notes may be deemed to be an "underwriter" within the meaning of the
Securities Act and any profit on any such resale of New Notes and any
commissions or concessions received by any such persons may be deemed to be
underwriting compensation under the Securities Act. The Letter of Transmittal
states that by acknowledging that it will deliver and by delivering a
prospectus, a broker-dealer will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.
 
                                       108
<PAGE>   111
 
     For period of 90 days after the consummation of the Exchange Offer the
Issuer will promptly send additional copies of this Prospectus and any amendment
or supplement to this Prospectus to any broker-dealer that requests such
documents in the Letter of Transmittal.
 
     The Issuer has agreed in the Registration Rights Agreement to indemnify
each broker-dealer reselling New Notes pursuant to this Prospectus, and their
officers, directors and controlling persons, against certain liabilities in
connection with the offer and sale of the New Notes, including liabilities under
the Securities Act, or to contribute to payments that such broker-dealers may be
required to make in respect thereof.
 
                                 LEGAL MATTERS
 
     The validity of the New Notes will be passed upon for the Company by Davis
Polk & Wardwell, New York, New York.
 
                         INDEPENDENT PUBLIC ACCOUNTANTS
 
     The consolidated balance sheets as of December 31, 1996 and 1995, and the
consolidated statements of income, retained earnings, and cash flows for each of
the three years in the period ended December 31, 1996, incorporated by reference
in this prospectus, have been included herein in reliance on the report of
Coopers & Lybrand L.L.P., independent accountants, given on the authority of
that firm as experts in auditing and accounting. With respect to the unaudited
interim financial information for the periods ended June 30, 1997 and 1996,
incorporated by reference in this prospectus, the independent accountants have
reported that they have applied limited procedures in accordance with
professional standards for a review of such information. However, their separate
report included in the Company's quarterly report on Form 10-Q for the quarter
ended June 30, 1997 and incorporated by reference herein, states that they did
not audit and they do not express an opinion on that interim financial
information. Accordingly, the degree of reliance on their report on such
information should be restricted in light of the limited nature of the review
procedures applied. The accountants are not subject to the liability provisions
of Section 11 of the Securities Act of 1933 for their report on the unaudited
interim financial information because that report is not a "report" or a "part"
of the registration statement prepared or certified by the accountants within
the meaning of Sections 7 and 11 of the Act.
 
                                       109
<PAGE>   112
 
                        GLOSSARY OF CERTAIN MINING TERMS
 
     Anode Copper:  Blister copper which has undergone further refinement to
remove impurities. In an anode furnace, the blister copper is blown with air and
natural gas to upgrade its purity to approximately 99.0% copper. It is then cast
into keystone-shaped slabs that are shipped to an electrolytic refinery.
 
     Anode Furnace:  A furnace in which blister copper is refined into anode
copper.
 
     Ball Mill:  A large rotating cylinder used for grinding ore with metal
balls as the grinding medium.
 
     Bench:  The horizontal floor along which mining progresses in a pit. As the
pit progresses to lower levels, safety benches are left in the walls to catch
any rock falling from above.
 
     Blister Copper:  Copper which has been cast after passing through a
converter. Blister copper is approximately 98.5% copper and takes its name from
"blisters" that form on the surface.
 
     Breccia:  A rock made up of highly angular coarse fragments.
 
     Cathode:  Copper cathodes are produced by a refining process. They are sold
or melted and cast into cakes, billets, wirebars or rods.
 
     Concentration:  The process by which ore is separated into metal
concentrates and reject material through processes such as crushing, grinding
and flotation. Concentrates are shipped to a smelter.
 
     Concentrator:  A plant where concentration takes place.
 
     Converter:  A principal phase of the smelting process, which involves the
blowing of oxygen-enriched air through molten metal, causing oxidation and the
removal of sulfur and other impurities from the metal.
 
     Copper Concentrates:  A product of the concentrator usually containing 20%
to 30% copper. It is the raw material for smelting.
 
     Crusher (primary, secondary, tertiary):  A machine for crushing rock, ore
or other material.
 
     Crushing and Grinding:  The processes by which ore is broken into small
pieces to prepare it for further processing.
 
     Dacite:  A fine-grained volcanic rock which is similar in composition to
andesite, except for a greater abundance of quartz crystals that are frequently
visible to the naked eye.
 
     Development:  Activities related to a mineral deposit commencing at the
point economically recoverable reserves can reasonably be estimated to exist and
generally continuing until commercial production begins.
 
     Diorite:  A dark, coarsely crystalline igneous rock, similar in composition
to granite, which is composed principally of silica, alumina, calcium, and iron.
 
     Electrolytic Cathodes:  Copper which has been refined by electrolytic
deposition.
 
     Electrolytic Refining:  Copper anodes are placed alternately with refined
copper sheets in a tank through which a copper sulfate solution and sulfuric
acid are circulated. A low voltage current is then introduced, causing copper to
transfer from the anodes to the pure copper sheets, producing 99.9% copper
cathodes. Impurities, often containing precious metals, settle to the bottom of
the tank.
 
     Electrowinning:  The process of removal of copper from solution by the
action of electric currents.
 
     Electrowon Cathodes:  Refined copper recovered from ore by means of
electrochemical processes.
 
     Exploration:  Activities associated with ascertaining the existence,
location, extent or quality of a mineral deposit.
 
     Flotation:  The process by which minerals attach themselves to the bubbles
on an oily froth and rise to the top where they are skimmed off. This process is
used primarily for the concentration of sulfide ores.
 
                                       110
<PAGE>   113
 
     Flux:  A high grade silica, which reacts with iron oxides formed during
smelting and converting stages, creating a molten slag.
 
     Flotation Cell:  Appliance in which froth flotation of ores is performed.
 
     Head Grade:  An estimate of the total mineral content of the ore being fed
into the concentrator.
 
     Heap Leach:  The process by which a mineral can be economically recovered
from low grade ore. A weak sulfuric acid solution is percolated through ore,
which has been stacked on an impervious liner, to dissolve minerals.
 
     Hectare:  A land measure equaling 2.471 acres.
 
     Intrusive Andesite:  That portion of a fine-to-medium grained volcanic rock
composed principally of silica, alumina, calcium and iron that has intruded or
penetrated pre-existing rock formations on its route to the surface.
 
     Latite:  A fine-grained light-colored volcanic igneous rock composed of
silica, alumina, calcium, and iron.
 
     Latite Porphyry:  A light-colored igneous rock composed of mineral grains
of one or more sizes in a ground mass of uniformly finer grain, which is
occasionally associated with porphyry copper deposits.
 
     Leaching:  Extracting a soluble metallic compound from an ore by
selectively dissolving it in a suitable solvent.
 
     Matrix:  The finer grain material enclosing or filling the interstices
between the larger grains or fragments of a breccia.
 
     Mill:  A machine used to grind ore to the consistency of powder.
 
     Milling:  A treatment process involving fine grinding of ore followed by
extraction of minerals.
 
     Mine:  Mines are the source of mineral-bearing material found near the
surface or deep in the ground.
 
     Mine Area:  That portion of the land area encompassing the Company's
Toquepala and Cuajone mines on which mining operations are conducted and
reserves are located.
 
     Mineral Deposit or Mineralized Material:  A mineralized underground body
which has been intersected by a sufficient number of closely-spaced drill holes
and/or underground sampling to support sufficient tonnage and ore grade to
warrant further exploration or development. Mineral deposits or mineralized
materials do not qualify as a commercially minable ore reserves (e.g., Probable
(Indicated) Reserves or Proven (Measured) Reserves), as prescribed under
standards of the Commission, until a final and comprehensive economic,
technical, and legal feasibility study based upon the test results has been
concluded.
 
     Mineralization:  A deposit of rock containing one or more minerals for
which the economics of recovery have not yet been established.
 
     Ore:  A mineral or aggregate of minerals from which metal can be
economically mined or extracted.
 
     Ore Grade:  The average amount of metal expressed as a percentage or in
ounces per ton.
 
     Ounces:  Unit of weight. A troy ounce equals 31,103 grams or 1.097
avoirdupois ounces.
 
     Overburden:  The alluvium and rock that must be removed in order to expose
an ore deposit.
 
     Overburden Stripping:  The removal of a waste material, required prior to
ore mining.
 
     Oxide Ore:  Metalliferous minerals altered by weathering, surface waters,
and their conversion, partly or wholly, into oxides, carbonates, or sulfates.
 
     Porphyry Copper Deposit:  A disseminated large-tonnage, low-grade deposit,
in which the copper minerals occur as discrete grains and veinlets throughout a
large volume of rock.
 
     Probable (Indicated) Reserves:  Reserves for which quantity and grade
and/or quality are computed from information similar to that used for Proven
(Measured) Reserves, but the sites for inspection, sampling, and
 
                                       111
<PAGE>   114
 
measurement are farther apart or are otherwise less adequately spaced. The
degree of assurance, although lower than that for Proven (Measured) Reserves, is
high enough to assume continuity between points of observation.
 
     Proven (Measured) Reserves:  Reserves for which (i) quantities are computed
from dimensions revealed in outcrops, trenches, workings or drill holes and
grade and/or quality are computed from the results of detailed sampling and (ii)
sites for inspection, sampling and measurement are spaced so closely together
and the geologic character is so well defined that the size, shape, depth and
mineral content of the reserves are well established.
 
     Reclamation:  The process of restoring mined land to a condition
established by applicable law. Reclamation standards vary widely, but usually
address ground and surface water, topsoil, final slope gradients, overburden and
revegetation.
 
     Refining:  The purification of crude metallic products.
 
     Refining Charge:  The fees charged by a refinery for purifying crude
metallic products.
 
     Reverberatory Furnace:  A furnace with a shallow hearth and a roof which
deflects the flame and radiates heat toward the hearth or the surface of the
charge.
 
     Rhyolitic:  Of, or relating to, rhyolite, a light colored medium grained
volcanic rock chemically similar to granite which is composed principally of
silica, alumina, potassium, and sodium with crystals which are frequently
embedded in a glassy ground mass.
 
     Rod Mill:  A large rotating cylinder used for grinding ore with metal rods
as the grinding medium.
 
     Smelting:  A pyro-metallurgical process of separating metal by fusion from
those impurities with which it may be chemically combined or physically mixed.
 
     Solvent Extraction:  A method of separating one or more substances from a
mixture, by treating a solution of the mixture with a solvent that will dissolve
certain substances and leave others.
 
     Sulfide Ore:  Ore characterized by the inclusion of metal in the crystal
structure of a sulfide mineral.
 
     Tailings:  Finely ground rock from which valuable minerals have been
extracted by milling.
 
     Teniente Converter:  A horizontal rotary furnace into which matte,
concentrates and flux are placed. Oxygen-rich air is blown through to provide
sufficient heat to smelt the concentrates. Off-gases are captured and forwarded
to the acid plant.
 
     Tons:  Unit of weight. A short ton (ST) equals 2,000 pounds. A metric ton
(MT) equals 2,204.6 pounds.
 
     Trend:  The arrangement of a group of ore deposits occurring in a linear
pattern.
 
                                       112
<PAGE>   115
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          -----
<C>   <S>                                                                                 <C>
  I.  Report of Independent Accountants.................................................    F-2
      Consolidated Statements of Earnings for the Years Ended December 31, 1996, 1995
        and 1994........................................................................    F-3
      Consolidated Balance Sheet as of December 31, 1996 and 1995.......................    F-4
      Consolidated Statement of Cash Flows for the Years Ended December 31, 1996, 1995
        and 1994........................................................................    F-5
      Consolidated Statements of Changes in Stockholders' Equity for the Years Ended
        December 31, 1996, 1995 and 1994................................................    F-6
      Notes to Consolidated Financial Statements........................................    F-7
 II.  Report of Independent Accountants with respect to Unaudited Condensed Consolidated
        Interim Financial Statements....................................................   F-22
      Unaudited Condensed Consolidated Statements of Earnings for the Six Months Ended
        June 30, 1997 and 1996..........................................................   F-23
      Condensed Consolidated Balance Sheets as of June 30, 1997 (Unaudited) and December
        31, 1996........................................................................   F-24
      Unaudited Condensed Consolidated Statements of Cash Flows for the Six Months Ended
        June 30, 1997 and 1996..........................................................   F-25
      Unaudited Notes to Condensed Consolidated Financial Statements....................   F-26
</TABLE>
 
                                       F-1
<PAGE>   116
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors and Stockholders of
Southern Peru Copper Corporation:
 
     We have audited the accompanying consolidated balance sheets of SOUTHERN
PERU COPPER CORPORATION and SUBSIDIARIES as of December 31, 1996 and 1995, and
the related consolidated statements of earnings, cash flows, and changes in
common stockholders' equity for each of the three years in the period ended
December 31, 1996. These financial statements are the responsibility of the
company's management. Our responsibility is to express an opinion on these
financial statements based on our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of Southern Peru
Copper Corporation and Subsidiaries, as of December 31, 1996 and 1995, and the
consolidated results of their operations, and their cash flows for each of the
three years in the period ended December 31, 1996, in conformity with generally
accepted accounting principles.
 
                                          COOPERS & LYBRAND L.L.P.
 
New York, New York
January 28, 1997, except for Note 22,
which is as of February 21, 1997
 
                                       F-2
<PAGE>   117
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                       CONSOLIDATED STATEMENT OF EARNINGS
                        FOR THE YEARS ENDED DECEMBER 31,
 
<TABLE>
<CAPTION>
                                                               1996         1995         1994
                                                             --------     --------     --------
                                                                   (DOLLARS IN THOUSANDS
                                                               EXCEPT FOR PER SHARE AMOUNTS)
<S>                                                          <C>          <C>          <C>
Net sales:
  Stockholders and affiliates..............................  $ 71,740     $ 85,819     $ 78,386
  Others...................................................   681,292      843,021      623,292
                                                             --------     --------     --------
          Total net sales..................................   753,032      928,840      701,678
Operating costs and expenses:
  Cost of sales............................................   389,577      439,382      453,951
  Administrative and other.................................    49,979       52,687       48,134
  Depreciation, amortization and depletion.................    41,623       35,952       39,742
  Provision for workers' participation.....................    18,025       32,212       13,944
  Exploration..............................................     5,063        1,950        3,880
                                                             --------     --------     --------
          Total operating costs and expenses...............   504,267      562,183      559,651
                                                             --------     --------     --------
Operating income...........................................   248,765      366,657      142,027
Interest income............................................    18,264       14,827        6,521
Interest expense...........................................   (12,467)     (13,904)      (7,779)
Other income...............................................    11,358       12,825       23,204
                                                             --------     --------     --------
Earnings before taxes on income and minority interest
  of labor shares..........................................   265,920      380,405      163,973
Taxes on income............................................    80,200      119,093       54,139
Minority interest of labor shares in income of Peruvian
  Branch...................................................     5,208       43,558       18,610
                                                             --------     --------     --------
Net earnings...............................................  $180,512     $217,754     $ 91,224
                                                             ========     ========     ========
Per common share amounts:
  Net earnings.............................................  $   2.25     $   3.31     $   1.39
  Dividends paid...........................................  $   1.47     $   1.27     $   0.33
  Weighted average number of shares outstanding............    80,195       65,717       65,717
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                       F-3
<PAGE>   118
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                           CONSOLIDATED BALANCE SHEET
                         AT DECEMBER 31, 1996 AND 1995
 
<TABLE>
<CAPTION>
                                                                         1996           1995
                                                                      ----------     ----------
                                                                       (DOLLARS IN THOUSANDS)
<S>                                                                   <C>            <C>
ASSETS
  Current assets:
     Cash and cash equivalents......................................  $  173,205     $  219,646
     Marketable securities..........................................       1,000         42,453
     Accounts receivable:
       Trade:
          Stockholders and affiliates...............................       8,504          8,732
          Other trade...............................................      70,252         80,100
       Other........................................................      10,831         11,631
     Inventories....................................................     118,681        103,635
     Other current assets...........................................      20,637         16,648
                                                                      ----------     ----------
            Total current assets....................................     403,110        482,845
  Net property......................................................     855,808        779,368
  Other assets......................................................      20,931          9,488
                                                                      ----------     ----------
            Total assets............................................  $1,279,849     $1,271,701
                                                                      ==========     ==========
LIABILITIES
  Current liabilities:
     Current portion of long-term debt..............................  $   23,683     $   17,034
     Accounts payable:
       Trade........................................................      23,740         32,889
       Other........................................................      10,124          8,056
     Other current liabilities......................................      47,768        112,390
                                                                      ----------     ----------
            Total current liabilities...............................     105,315        170,369
                                                                      ----------     ----------
  Long-term debt....................................................      82,892         76,828
  Deferred income taxes.............................................      49,426         39,677
  Other liabilities.................................................       4,806          6,354
                                                                      ----------     ----------
            Total non-current liabilities...........................     137,124        122,859
                                                                      ----------     ----------
  Contingencies.....................................................
Minority interest of labor shares in the Peruvian Branch............      22,383         24,986
                                                                      ----------     ----------
STOCKHOLDERS' EQUITY
  Common stock, par value $0.01; 1996 -- 33,449,167;
     1995 -- 31,249,167 shares authorized; Issued
     1996 -- 13,633,674; 1995 -- 11,479,667.........................         137            115
  Class A Common stock, par value $0.01; Issued and Authorized:
     1996 -- 66,550,833; 1995 -- 68,750,833.........................         666            688
  Additional paid-in capital........................................     265,745        265,738
  Retained earnings.................................................     749,267        686,946
  Treasury stock, at cost, 46,419 shares at December 31, 1996.......        (788)            --
                                                                      ----------     ----------
            Total Stockholders' equity..............................   1,015,027        953,487
                                                                      ----------     ----------
            Total Liabilities, Minority Interest and Stockholders'
               equity...............................................  $1,279,849     $1,271,701
                                                                       =========      =========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                       F-4
<PAGE>   119
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                        FOR THE YEARS ENDED DECEMBER 31,
 
<TABLE>
<CAPTION>
                                                                 1996        1995        1994
                                                               ---------   ---------   ---------
                                                                    (DOLLARS IN THOUSANDS)
<S>                                                            <C>         <C>         <C>
OPERATING ACTIVITIES
  Net earnings.............................................    $ 180,512   $ 217,754   $  91,224
  Adjustments to reconcile net earnings to net cash
     provided from operating activities:
     Depreciation, amortization and depletion..............       41,623      35,952      39,742
     Provision for deferred income taxes...................       12,043       3,168      (2,342)
     Minority interest of labor shares.....................        5,208      43,558      18,610
     Net (gain) loss on sale of investments and property...          110       2,473     (17,876)
  Cash provided from (used for) operating assets and
     liabilities:
     Accounts receivable...................................       10,498      (1,939)    (47,787)
     Inventories...........................................      (15,046)      7,992       3,502
     Accounts payable and accrued liabilities..............      (52,023)     19,667      49,400
     Other operating assets and liabilities................      (17,444)      7,699       2,040
     Foreign currency transaction gain.....................       (6,707)     (5,950)     (1,619)
                                                               ---------   ---------   ---------
          Net cash provided from operating activities......      158,774     330,374     134,894
                                                               ---------   ---------   ---------
INVESTING ACTIVITIES
  Capital expenditures.....................................     (120,803)   (183,041)   (181,912)
  Release of restricted cash...............................           --      60,450          --
  Purchase of held-to-maturity investments.................           --     (76,333)    (82,461)
  Proceeds from held-to-maturity investments...............       41,453      76,877      75,302
  Sale of investments and property.........................           --       2,596      50,252
                                                               ---------   ---------   ---------
          Net cash used for investing activities...........      (79,350)   (119,451)   (138,819)
                                                               ---------   ---------   ---------
FINANCING ACTIVITIES
  Debt incurred............................................       47,000      62,000     104,176
  Debt repaid..............................................      (34,289)    (86,110)     (1,803)
  Escrow deposits on long-term loans.......................      (10,065)     10,809     (12,026)
  Dividends paid to common stockholders....................     (117,913)    (83,747)    (21,415)
  Distributions to minority interests......................       (4,091)         --          --
  Net treasury stock transactions..........................       (1,155)         --          --
  Purchase of labor share interest.........................       (7,130)         --          --
  Proceeds from labor share subscription...................           --      10,944          --
  Installment payment on purchase of Joint Venture
     interest..............................................           --          --      (4,200)
                                                               ---------   ---------   ---------
          Net cash provided from (used for) financing
            activities.....................................     (127,643)    (86,104)     64,732
                                                               ---------   ---------   ---------
Effect of exchange rate changes on cash....................        1,778       1,491         819
                                                               ---------   ---------   ---------
          Net increase (decrease) in cash and cash
            equivalents....................................      (46,441)    126,310      61,626
Cash and cash equivalents, beginning of year...............      219,646      93,336      31,710
                                                               ---------   ---------   ---------
Cash and cash equivalents, end of year.....................    $ 173,205   $ 219,646   $  93,336
                                                               =========   =========   =========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                       F-5
<PAGE>   120
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
                        FOR THE YEARS ENDED DECEMBER 31,
 
<TABLE>
<CAPTION>
                                                                   1996        1995       1994
                                                                ----------   --------   --------
                                                                     (DOLLARS IN THOUSANDS)
<S>                                                             <C>          <C>        <C>
Common stock:
  Southern Peru Copper Corporation (formerly Southern Peru
     Copper Holding Company):
     Common Stock:
       Balance at beginning of year...........................  $      115
          Issuance of 11,480,093 shares.......................          --   $    115
          Conversion from Class A to Common Stock, 2,200,000
            shares............................................          22         --
                                                                ----------   --------
     Balance at end of year...................................         137        115
                                                                ----------   --------
     Class A Common Stock:
       Balance at beginning of year...........................         688
          Issuance of 68,750,833 shares.......................          --        688
          Conversion to Common Stock, 2,200,000 shares........         (22)        --
                                                                ----------   --------
       Balance at end of year.................................         666        688
                                                                ----------   --------
     Southern Peru Limited:
       Balance at beginning of year, 76,251,193 shares........                    763   $    763
          Retirement of treasury stock, 10,533,700 shares.....                   (106)        --
          Exchange for shares of Southern Peru Copper
            Corporation, 65,717,493 shares....................                   (657)        --
                                                                             --------   --------
       Balance at end of year.................................                     --        763
                                                                             --------   --------
Additional paid-in capital:
  Southern Peru Copper Corporation:
     Balance at beginning of year.............................     265,738
       Additional paid-in capital on shares issued............          --     81,222
       Market value of shares issued in exchange for labor
          shares..............................................          --    184,516
       Additional paid-in capital on treasury shares issued...           7         --
                                                                ----------   --------
     Balance at end of year...................................     265,745    265,738
                                                                ----------   --------
  Southern Peru Limited:
     Balance at beginning of year.............................                122,477    122,477
       Retirement of treasury stock...........................                (41,224)        --
       Exchange to shares of Southern Peru Copper
          Corporation.........................................                (81,253)        --
                                                                             --------   --------
     Balance at end of year...................................                     --    122,477
                                                                             --------   --------
Treasury Stock:
  Southern Peru Copper Corporation:
     Balance at beginning of year.............................          --
       Purchased..............................................      (1,155)
       Used for corporate purposes............................         367
                                                                ----------
     Balance at end of year...................................        (788)
                                                                ----------
  Southern Peru Limited:
     Balance at beginning of year, 10,533,700 shares..........                (60,000)   (60,000)
       Retirement of 10,533,700 shares of treasury stock......                 60,000         --
                                                                             --------   --------
     Balance at end of year...................................                     --    (60,000)
                                                                             --------   --------
Retained earnings:
  Balance at beginning of year................................     686,946    571,609    501,800
     Net earnings.............................................     180,512    217,754     91,224
     Dividends paid...........................................    (117,913)   (83,747)   (21,415)
     Stock awards.............................................        (278)        --         --
     Retirement of treasury stock.............................          --    (18,670)        --
                                                                ----------   --------   --------
  Balance at end of year......................................     749,267    686,946    571,609
                                                                ----------   --------   --------
          Total stockholders' equity..........................  $1,015,027   $953,487   $634,849
                                                                ==========   ========   ========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                       F-6
<PAGE>   121
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     Principles of consolidation:
 
     The consolidated financial statements of Southern Peru Copper Corporation
and subsidiaries (the "Company") include the accounts of its significant
subsidiaries in which the Company has voting control, and are prepared in
accordance with generally accepted accounting principles in the United States
("U.S. GAAP"). Certain reclassifications have been made in the financial
statements from amounts previously reported to conform to the current year's
presentation.
 
     Use of estimates:
 
     The preparation of financial statements in conformity with U.S. GAAP
requires management to make estimates and assumptions that affect the reported
amounts of assets and liabilities and disclosure of contingent assets and
liabilities at the date of the financial statements and the reported amounts of
revenues and expenses during the reporting period. Actual results could differ
from those estimates.
 
     Revenue recognition:
 
     Substantially all of the Company's copper is sold under annual contracts.
Sales are recognized when title passes. Pricing is based on prevailing monthly
average London Metal Exchange ("LME") copper prices for a quotational period,
generally being the month of, the month prior or the month following the actual
or contractual month of shipment or delivery according to the terms of the
contracts. Price estimates used for provisionally priced sales are based on
prices in effect at the time of shipment or period end prices, if lower, and
these estimates are subject to change during the settlement period. The Company
sells copper in blister and refined form at industry standard commercial terms.
Net sales include, principally the invoiced value of copper, silver, molybdenum
and, in 1996, gains from the sale or settlement of copper put options.
 
     Cash equivalents and marketable securities:
 
     The Company considers all highly liquid investments with a maturity of
three months or less, when purchased, to be cash equivalents. Marketable
securities include liquid investments with a maturity, when purchased, of more
than three months and are carried at cost, which approximates market value.
 
     Inventories:
 
     Metal inventories are carried at the lower of average cost or market. Costs
incurred in the production of metal inventories exclude general and
administrative costs. Supplies inventories are carried at cost less a reserve
for obsolescence.
 
     Property:
 
     Assets are stated at cost or net realizable value. During 1995, the Company
adopted Statement of Financial Accounting Standards ("SFAS") No. 121 "Accounting
for the Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed
Of." This statement requires that long-lived assets, certain identifiable
intangibles and goodwill related to those assets be reviewed for impairment
whenever events or changes in circumstances indicate that the carrying amount of
the assets may not be recoverable. The impairment loss on such assets, as well
as long-lived assets and certain identifiable intangibles to be disposed of, is
measured as the amount by which the carrying value of the assets exceeds the
fair value of the assets. Application of the statement had no impact in 1996 or
1995. The Company evaluates the carrying value of assets based on undiscounted
future cash flows considering expected metal prices based on historical metal
prices and price trends.
 
                                       F-7
<PAGE>   122
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
     Buildings and equipment are depreciated on the straight-line method over
estimated lives from 5 to 40 years, or the estimated life of the mine if
shorter. The cost of major mine development programs at existing mines, the cost
of bringing new mineral properties into production and the cost of mineral lands
are capitalized and charged to earnings on the units-of-production method using
proven and probable ore reserves.
 
     Maintenance, repairs, normal development costs at existing mines and gains
or losses on assets retired or sold are reflected in earnings as incurred. The
cost of renewals is capitalized and the property unit being replaced is retired.
The cost of betterments is capitalized. General and administrative costs
attributed to mining, exploration and development are expensed as incurred.
 
     Financial Instruments:
 
     Depending on the market fundamentals of a metal and other conditions, the
Company may purchase put options to reduce or eliminate the risk of metal price
declines below the option strike price on a portion of its anticipated future
production. The cost of options is amortized on a straight-line basis during the
period in which the options are exercisable. Gains or losses from the sale or
exercise of options, net of unamortized acquisition costs, are recognized in the
period in which the underlying production is sold and are reported as a
component of the underlying transaction.
 
     Exploration:
 
     Tangible and intangible costs incurred in the search for mineral properties
are charged against earnings when incurred.
 
2. EXCHANGE OFFER
 
     Southern Peru Copper Holding Company, (the "Holding Company"), was
incorporated on September 7, 1995, pursuant to the General Corporation Law of
the State of Delaware for the purpose of conducting an exchange offer of its
common stock, par value $0.01 per share, for any and all labor shares of the
Peruvian Branch (the "Branch") of Southern Peru Copper Corporation (the
"Operating Company"). In connection with the exchange offer, the Operating
Company changed its name to Southern Peru Limited ("SP Limited") and the Holding
Company changed its name to Southern Peru Copper Corporation (the "Company").
 
     The Holding Company offered to exchange one share of its common stock for
four S-1 labor shares and one share of common stock for five S-2 labor shares.
The exchange offer expired on December 29, 1995, with 80.8% of the labor shares
tendered which reduced the interest of labor shares from 17.3% to 3.3%. At
December 31, 1996, the interest of labor shares was 2.8%. The common stock is
listed on the New York Stock Exchange and the Lima Stock Exchange and trading
commenced January 5, 1996.
 
     In addition, the stockholders of SP Limited exchanged 65,717,493 of their
common stock for 68,750,833 Class A common stock in the Company.
 
     With the completion of the exchange offer, the Company has outstanding two
classes of common stock; the common stock exchanged for labor shares and Class A
common stock which at December 31, 1996 represent 17% and 83% of the common
equity of the Company, respectively. Holders of common stock are entitled to one
vote per share and holders of Class A common stock are entitled to five votes
per share except for the election of directors and as required by law.
 
     The exchange of common stock for labor shares was accounted for a purchase
of a minority interest. The value of the common stock issued in the exchange
(based on the average per share trading value for the three business days ended
January 9, 1996) plus issuance costs exceeded the carrying value of the minority
interests acquired by $82.0 million, net of income taxes. The increase in value
was assigned to proven and probable sulfide
 
                                       F-8
<PAGE>   123
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
2. EXCHANGE OFFER -- (CONTINUED)
and leachable ore reserves and mineralized material which is being amortized
based on production, and to metal inventory.
 
     The following table provides the comparative unaudited proforma 1995
earnings information, as if the exchange offer was completed on January 1, 1995.
 
<TABLE>
<CAPTION>
                                                                                1995
                                                                     --------------------------
                                                                                    (UNAUDITED)
                                                                     HISTORICAL      PROFORMA
                                                                     ----------     -----------
                                                                        (IN MILLIONS, EXCEPT
                                                                          PER SHARE DATA)
    <S>                                                              <C>            <C>
    Net sales......................................................    $928.8         $ 928.8
                                                                       ------         -------
    Earnings before taxes on income and minority interest of labor
      shares.......................................................     380.4           370.7(a)
    Taxes on income................................................     119.1           118.9(b)
    Minority interest of labor shares in Peruvian Branch...........      43.5             7.7(c)
                                                                       ------         -------
    Net earnings...................................................    $217.8         $ 244.1
                                                                       ======         =======
    Net earnings per share.........................................    $ 3.31         $  3.04
    Cash dividends paid per share..................................    $ 1.27         $  1.04
    Weighted average number of shares outstanding..................      65.7            80.2
</TABLE>
 
- ---------------
(a) The market value of the common stock issued for labor shares tendered
    pursuant to the exchange offer was in excess of the book value of the
    minority interest of such labor shares. This excess was assigned to proven
    and probable mineral reserves, mineralized material and to metal inventory.
    Proforma earnings reflect the amortization of the excess of market value
    over book value which was assigned to mineral reserves and mineralized
    material, based on actual copper production and a charge to cost of products
    sold of the excess amount which would have been assigned to metal inventory
    at January 1, 1995.
 
(b) Reflects the reduction of the deferred income taxes related to the
    amortization of excess of the market value of common stock issued for labor
    shares tendered pursuant to the exchange offer over the book value of the
    minority interest of such labor shares.
 
(c) Reflects the reduction of the minority interest of the labor shares tendered
    pursuant to the exchange offer.
 
3. IMPACT OF NEW ACCOUNTING STATEMENT
 
     The American Institute of Certified Public Accountants issued Statement of
Position 96-1, "Environmental Remediation Liabilities" ("SOP 96-1") in October
1996. SOP 96-1 provides authoritative guidance on specific accounting issues in
connection with recognizing, measuring and disclosing environmental remediation
liabilities. Application of SOP 96-1 in the fourth quarter of 1996 had no effect
on the Company's financial statements.
 
4. FOREIGN EXCHANGE
 
     The functional currency of the Company is the U.S. dollar. The Company's
sales, cash, trade receivables, fixed asset additions, trade payables and debt
are primarily dollar-denominated. A portion of the operating costs of the
Company is denominated in Peruvian soles.
 
     Gains resulting from foreign currency transactions are included in "Other
income" and amounted to $6.7 million, $6.0 million and $1.6 million in 1996,
1995 and 1994, respectively.
 
                                       F-9
<PAGE>   124
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
5. INVESTMENTS
 
     In 1995, Fomenta S.A., a wholly owned Peruvian subsidiary, sold its 28.5%
interest in Metalurgica Peruana S.A., ("MEPSA"), for $1.4 million. The sale of
MEPSA, carried at cost, resulted in a pre-tax gain of $1.3 million.
 
     During 1994, the Company sold three investments for $50.3 million. The sale
of these investments, primarily indirect interests in other Peruvian mining
companies, carried at cost, resulted in a pre-tax gain of $18.4 million.
 
6. ACQUISITION
 
     On May 31, 1994, the Company purchased the Peruvian government owned Minero
Peru Ilo refinery for $65.0 million in cash. The purchase price was primarily
allocated to supplies inventory ($14.9 million) and fixed assets ($51.2 million)
based on their fair values. The Company also committed to make an additional
$20.2 million of capital improvements over three years. The Company had
substantially completed this commitment at December 31, 1996. Prior to the
acquisition, the Company was required to toll-refine copper under a contract
with Minero Peru. The costs of operating the refinery have been included in the
consolidated operating results since the date of acquisition.
 
7. TAXES ON INCOME
 
THE COMPONENTS OF THE PROVISION FOR TAXES ON INCOME ARE AS FOLLOWS:
 
<TABLE>
<CAPTION>
                 FOR THE YEARS ENDED DECEMBER 31,                1996       1995      1994
                                                                 -----     ------     -----
                                                                   (DOLLARS IN MILLIONS)
    <S>                                                          <C>       <C>        <C>
    U.S. Federal and state.....................................  $ 5.3     $  4.6     $ 7.3
    Foreign:
      Current..................................................   62.9      111.3      49.1
      Deferred.................................................   12.0        3.2      (2.3)
                                                                 -----     ------     -----
    Foreign....................................................   74.9      114.5      46.8
                                                                 -----     ------     -----
         Total provision for income taxes......................  $80.2     $119.1     $54.1
                                                                 =====     ======     =====
</TABLE>
 
     Total taxes paid were $123.4 million, $80.1 million and $42.4 million in
1996, 1995 and 1994, respectively.
 
     Reconciliation of the statutory income tax rate to the effective income tax
rate is as follows:
 
<TABLE>
<CAPTION>
                  FOR THE YEARS ENDED DECEMBER 31,                 1996      1995      1994
                                                                   -----     -----     -----
    <S>                                                            <C>       <C>       <C>
    Peruvian income tax at maximum statutory rates...............   30.0%     30.0%     30.0%
    U.S. income tax as statutory rate............................   35.0      35.0      35.0
    Utilization of foreign tax credits...........................  (25.3)    (27.9)    (14.1)
    Percentage depletion.........................................   (9.0)     (6.6)    (12.5)
    Income not deductible (not taxable) in Peru..................   (1.8)      0.1       2.2
    Effect of labor shares.......................................     --        --      (4.0)
    Other........................................................    1.3       0.7      (3.6)
                                                                   -----     -----     -----
      Effective income tax rate..................................   30.2%     31.3%     33.0%
                                                                   =====     =====     =====
</TABLE>
 
                                      F-10
<PAGE>   125
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
7. TAXES ON INCOME -- (CONTINUED)
     Temporary differences and carryforwards which give rise to deferred tax
assets, liabilities and related valuation allowances are as follows:
 
<TABLE>
<CAPTION>
                              AT DECEMBER 31,                             1996       1995
                                                                         ------     ------
                                                                            (DOLLARS IN
                                                                             MILLIONS)
    <S>                                                                  <C>        <C>
    DEFERRED TAX ASSETS (LIABILITIES)
    Current:
      Accounts receivable..............................................  $  0.5     $  1.5
      Inventories......................................................     0.1        0.1
                                                                         ------     ------
         Net deferred tax assets.......................................     0.6        1.6
                                                                         ------     ------
    Non-current:
      Foreign tax credit carryforwards.................................    69.4       80.8
      Alternative minimum tax ("AMT") credit carryforwards.............     6.8        5.8
      Property, plant and equipment....................................   (48.7)     (38.8)
      Other............................................................    (0.7)      (0.9)
      Valuation allowance for deferred tax assets......................   (76.2)     (86.6)
                                                                         ------     ------
         Net deferred tax liabilities..................................   (49.4)     (39.7)
                                                                         ------     ------
    Total net deferred tax liabilities.................................  $(48.8)    $(38.1)
                                                                         ======     ======
</TABLE>
 
     At December 31, 1996, the foreign tax credit carryforward available to
reduce possible future U.S. income taxes amounted to $69.4 million which expires
as follows: $16.8 million in 1998, $13.6 million in 1999 and $39.0 million in
2001.
 
     The Company has not recorded the benefit of foreign tax credit
carryforwards because of both the expiration dates and the rules governing the
order in which such credits are utilized. The Company also has not recorded a
benefit for the AMT credits, which are not available to reduce AMT. Because of
limitations on both percentage depletion and foreign tax credits under the AMT,
the Company expects an AMT liability for the foreseeable future. Thus, while
such credits do not expire, it is unlikely they will be utilized. Accordingly, a
valuation allowance has been established for the full amount of the foreign tax
credit carryforward and the AMT credit carryforward. The decrease in the
valuation allowance of $10.4 million from 1995 to 1996 is attributable to the
expiration of foreign tax credits in 1996.
 
     Peruvian value added taxes paid are recorded as prepaid expenses and are
utilized to pay Peruvian income taxes or are refunded by the Peruvian tax
department. The carrying value of these Peruvian tax credits approximates their
market value.
 
8. NET SALES
 
     Net sales were to the following customers:
 
<TABLE>
<CAPTION>
                FOR THE YEARS ENDED DECEMBER 31,                1996       1995       1994
                                                               ------     ------     ------
                                                                  (DOLLARS IN MILLIONS)
    <S>                                                        <C>        <C>        <C>
    S.A. Sogem, N.V. (under a long-term supply contract, see
      below).................................................  $ 58.9     $120.8     $ 81.8
    Japanese Group (a group of Japanese customers who
      purchased under a single sales contract)...............      --        7.1       78.6
    Others (none of which are individually 10% or more of
      annual sales)..........................................   694.1      800.9      541.3
                                                               ------     ------     ------
      Net Sales..............................................  $753.0     $928.8     $701.7
                                                               ======     ======     ======
</TABLE>
 
                                      F-11
<PAGE>   126
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
8. NET SALES -- (CONTINUED)
     At December 31, 1996, the Company has recorded sales of 68.2 million pounds
of copper at a provisional price of $1.02 per pound. These sales are subject to
final pricing based on the average monthly LME copper price in the month of
final settlement which will occur principally in the first quarter of 1997.
 
     Under the terms of a sales contract with Mistui & Co. Ltd. ("Mitsui"), the
Company is required to supply Mitsui, at its option, up to 26,455 tons of copper
cathodes annually for a seven-year period from January 1, 1994 through December
31, 2000. Pricing of the cathodes is based upon the LME monthly average
settlement price plus a producer premium for refined copper cathodes which is
agreed upon annually based on world market terms.
 
     Under the terms of a sales contract with Union Miniere, the Company is
required to supply Union Miniere through its agent, S.A. Sogem N.V., with 46,300
tons of blister copper annually for a ten-year period from January 1, 1994,
through December 31, 2003. The price of the copper contained in blister supplied
under the contract is determined based on the LME monthly average settlement
price less a refining allowance, which is agreed upon annually based on world
market terms.
 
9. FINANCIAL INSTRUMENTS
 
     Depending on the market fundamentals of a metal and other conditions, the
Company may purchase put options to reduce or eliminate the risk of metal price
declines below the option strike price on a portion of its anticipated future
production. Put options purchased by the Company establish a minimum sales price
for the production covered by such put options and permit the Company to
participate in price increases above the option price. The cost of options is
amortized on a straight-line basis during the period in which the options are
exercisable. Depending upon market conditions the Company may either sell
options it holds or exercise the options at maturity. Gains or losses, net of
unamortized acquisition costs are recognized in the period in which the
underlying production is sold and are reported as a component of the underlying
transaction.
 
     For the full year 1996, the Company realized pre-tax gains of $16.7 million
as a result of its copper price protection program, of which $11.1 million was
recognized in 1996. The remaining $5.6 million will be recognized in the first
quarter of 1997 when the underlying production is sold. Copper put options with
a cost of $1.2 million expired during the first six months of 1996. The
recognized pre-tax gains (losses) of the Company's metal hedging activities, net
of transaction costs were $9.9 million, $(2.1) million and $(1.8) million in
1996, 1995 and 1994, respectively.
 
     The estimated fair values of the Company's financial instruments are:
 
<TABLE>
<CAPTION>
                                                           1996                    1995
                                                    -------------------     -------------------
                                                    CARRYING      FAIR      CARRYING      FAIR
                   AT DECEMBER 31,                   VALUE       VALUE       VALUE       VALUE
                                                    --------     ------     --------     ------
                                                               (DOLLARS IN MILLIONS)
    <S>                                             <C>          <C>        <C>          <C>
    Assets:
      Cash and cash equivalents...................   $173.2      $173.2      $219.6      $219.6
      Marketable securities -- Held to Maturity...      1.0         1.0        42.5        42.5
      Put Options.................................       --          --         3.2         1.6
    Liabilities:
      Long-term Debt..............................   $106.6      $102.3      $ 93.9      $ 87.8
</TABLE>
 
     The following methods and assumptions were used to estimate the fair value
of each class of financial instruments for which it is practicable to estimate
that value:
 
     Cash and cash equivalents -- The carrying amount approximates fair value
because of the short maturity of those instruments.
 
                                      F-12
<PAGE>   127
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
9. FINANCIAL INSTRUMENTS -- (CONTINUED)
     Marketable securities -- The carrying amount and fair value are reported at
amortized cost since these securities are to be held to maturity.
 
     Put options -- Fair value is an estimate based on relevant market
information such as: volatility of similar options, futures prices and the
contracted strike price.
 
     Long-term debt -- The fair market value is based on the quoted market
prices for the same or similar issues or the carrying value is used where a
market price is unavailable.
 
10. WORKERS' PARTICIPATION
 
     Provisions for workers' participation are calculated at 8% of pre-tax
Branch earnings as required by Peruvian law. The amount is calculated under
Peruvian GAAP and cannot, therefore, be directly derived from the consolidated
financial statements which are prepared in accordance with U.S. GAAP. This
participation is expensed during the year. The Company distributes the accrued
participation to workers following the final results for the year.
 
11. MINORITY INTEREST OF LABOR SHARES
 
     The minority interest of the labor shares is based on the earnings of the
Company's Peruvian Branch. The amount is calculated under Peruvian GAAP and
cannot therefore be directly derived from the consolidated financial statements
which are prepared in accordance with U.S. GAAP.
 
     Under Peruvian law, the holders of the labor shares are entitled to
preemptive rights, which require the Branch to offer holders the right to
purchase a sufficient number of shares to maintain their existing ownership
percentage of the Branch whenever the Company invests additional capital in the
Branch. In March 1995, the Company invested $61.1 million in the Branch as a
capital contribution to Branch equity (see note 20). Labor shareholders
subscribed to 3.4 million new shares, with a contribution of $10.9 million,
representing 84.2% of the total possible subscription. Since full subscription
rights were not exercised, labor share participation in the Branch decreased
from 17.4% to 17.31%.
 
     On November 29, 1995, the Company announced an offer to exchange the common
stock of the Company for any and all of the labor shares of the Branch. The
offer expired on December 29, 1995, and 46.6 million labor shares or 80.8% of
the total, were exchanged for common stock decreasing the labor share
participation from 17.3% to 3.3%.
 
     During 1996, the Company acquired approximately 1.8 million labor shares
representing a 0.5% interest in the Branch at a total cost of $7.1 million. The
carrying value of minority interest was reduced by $4.4 million and the excess
paid over carrying value of $2.7 million was assigned to proven and probably
sulfide and leachable ore reserves and mineralized material and is being
amortized based on production. As a result of the acquisition, the remaining
labor shareholders hold a 2.8% interest in the Branch at December 31, 1996 and
are entitled to participate in 2.8% of the distributions of the Branch. The 2.8%
share of the Branch's after-tax earnings attributable to the labor shares is
recorded as a minority interest in the Company's financial statements.
 
                                      F-13
<PAGE>   128
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
12. INVENTORIES
 
<TABLE>
<CAPTION>
                              AT DECEMBER 31,                             1996       1995
                                                                         ------     ------
                                                                            (DOLLARS IN
                                                                             MILLIONS)
    <S>                                                                  <C>        <C>
    Metals:
      Finished goods...................................................  $  2.4     $  2.0
      Work-in-process..................................................    47.1       33.1
      Supplies, net of reserves........................................    69.2       68.5
                                                                         ------     ------
              Total inventories........................................  $118.7     $103.6
                                                                         ======     ======
</TABLE>
 
13. PROPERTY
 
<TABLE>
<CAPTION>
                            AT DECEMBER 31,                             1996         1995
                                                                      --------     --------
                                                                      (DOLLARS IN MILLIONS)
    <S>                                                               <C>          <C>
    Buildings and equipment.........................................  $1,503.3     $1,391.7
    Mineral Land....................................................     235.3        237.9
    Land, other than mineral........................................       0.9          0.9
                                                                      --------     --------
         Total property.............................................   1,739.5      1,630.5
    Accumulated depreciation........................................     883.7        851.1
                                                                      --------     --------
              Net property..........................................  $  855.8     $  779.4
                                                                      ========     ========
</TABLE>
 
14. OTHER CURRENT LIABILITIES
 
<TABLE>
<CAPTION>
                            AT DECEMBER 31,                             1996         1995
                                                                        -----       ------
                                                                           (DOLLARS IN
                                                                            MILLIONS)
    <S>                                                                 <C>         <C>
    Taxes on income.................................................    $ 8.9       $ 59.7
    Provision for workers' participation............................     16.7         31.1
    Accrued severance pay, current portion..........................      3.1          3.7
    Salaries and wages..............................................      8.1          8.0
    Other...........................................................     11.0          9.9
                                                                        -----       ------
              Total other current liabilities.......................    $47.8       $112.4
                                                                        =====       ======
</TABLE>
 
15. DEBT AND AVAILABLE CREDIT FACILITIES
 
<TABLE>
<CAPTION>
                            AT DECEMBER 31,                              1996        1995
                                                                        ------       -----
                                                                           (DOLLARS IN
                                                                            MILLIONS)
    <S>                                                                 <C>          <C>
    LONG-TERM DEBT CONSISTS OF:
    EXIM Bank credit agreement, interest at 6.43%, principal due
      1996-2001.....................................................    $ 26.3       $32.1
    CAF credit agreement, interest at an average of 9.1% as of
      December 31, 1996, principal due 1996-2001....................      35.3        43.2
    Mitsui credit agreement, interest at LIBOR + 2.87%, principal
      due 1996-2001.................................................      45.0         3.2
    Term loans, interest at prime + 3.00%...........................        --        15.4
                                                                        ------       -----
         Total debt.................................................     106.6        93.9
    Less, current portion...........................................      23.7        17.1
                                                                        ------       -----
              Total long-term debt..................................    $ 82.9       $76.8
                                                                        ======       =====
</TABLE>
 
                                      F-14
<PAGE>   129
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
15. DEBT AND AVAILABLE CREDIT FACILITIES -- (CONTINUED)
     The fair market value of long-term debt was $102.3 million at December 31,
1996 and $87.8 million at December 31, 1995, and was determined using discounted
cash flow analysis on the fixed-rate debt. The fair market value of the
variable-rate debt approximates its carrying amount.
 
     Aggregate maturities of the borrowings outstanding at December 31, 1996,
are as follows (in millions):
 
<TABLE>
                <S>                                                   <C>
                1997................................................  $ 23.7
                1998................................................    23.7
                1999................................................    23.7
                2000................................................    23.7
                2001................................................    11.8
                                                                      ------
                          Total.....................................  $106.6
                                                                      ======
</TABLE>
 
     At December 31, 1996, there were no unused and available lines of credit
available to the Company under its long-term loan facilities.
 
     Under the most restrictive covenant of the Company's loan agreements,
additional indebtedness of $752 million would have been permitted at December
31, 1996.
 
     Interest paid for borrowings (including amounts capitalized of $1.8 million
and $1.6 million in 1995 and 1994, respectively) was $10.8 million, $14.4
million and $10.5 million in 1996, 1995 and 1994, respectively.
 
     Fees paid for loan agreements were $1.6 million and $3.5 million in 1995
and 1994, respectively, and are amortized over the respective terms of the
loans. On July 21, 1995, the Company prepaid substantially all of the
outstanding balance related to a $115.0 million facility resulting in a charge
to interest expense of $2.0 million for unamortized loan fees.
 
     The financing agreements contained covenants which limit the payment of
dividends to stockholders. Under the most restrictive loan, the Company may not
pay a dividend if the aggregate amount of all dividend payments with respect to
any fiscal quarter is greater than 50% of net income (as defined therein) of the
Company for such fiscal quarter. However, this agreement permits dividends with
respect to the final quarter of each fiscal year to the extent that total
dividends for such fiscal year do not exceed 50% of the first $50 million of
earnings plus 100% of earnings in excess of $50 million for such fiscal year.
These dividend restrictions directly apply to SP Limited as the issuer of the
debt. However, on consolidation they also apply to SPCC. Net assets of SP
Limited unavailable for the payment of dividends to SPCC totaled $821 million at
December 31, 1996.
 
     The financing agreements are collateralized by pledges of receivables from
34,200 tons of copper per year and liens on certain product inventory, fixed
assets and mining concessions. In addition, certain of the agreements require
the Company to maintain a minimum stockholders' equity of $750 million,
specified ratios of debt to equity, current assets to current liabilities and an
interest coverage test. Any reduction of ASARCO Incorporated's ("Asarco") voting
interest in the Company to less than a majority would constitute an event of
default under of the financing agreements. The Company is in compliance with the
various loan covenants at December 31, 1996. Included in Other Assets are $11.3
million held in escrow accounts as required by the Company's loan agreements.
The funds will be released from escrow as scheduled loan repayments are made.
 
16. BENEFIT PLANS
 
     The Company has two noncontributory, defined benefit pension plans covering
salaried employees in the United States and certain employees in Peru. Benefits
are based on salary and years of service. The Company's funding policy is to
contribute amounts to the plans sufficient to meet the minimum funding
requirements set forth in the Employee Retirement Income Security Act of 1974,
plus such additional amounts as the Company
 
                                      F-15
<PAGE>   130
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
16. BENEFIT PLANS -- (CONTINUED)
may determine to be appropriate. Plan assets are primarily invested in immediate
participation guarantee contracts, mutual funds, stock index funds and money
market instruments. Effective January 1, 1997 one of the Company's pension
plans, which provides benefits to non-U.S. expatriate employees, was amended to
cease future benefit accruals. Accordingly, those participants became eligible
for future benefits under the Company's other pension plan.
 
     Net pension costs consist of:
 
<TABLE>
<CAPTION>
                  FOR THE YEARS ENDED DECEMBER 31,                 1996      1995      1994
                                                                   -----     -----     -----
                                                                     (DOLLARS IN MILLIONS)
    <S>                                                            <C>       <C>       <C>
    Service cost.................................................  $ 0.5     $ 0.3     $ 0.5
    Interest cost on projected benefit obligation................    0.5       0.4       0.4
    Actual return on plan assets.................................   (0.6)     (0.4)      0.4
    Other items..................................................    0.4       0.3      (0.5)
                                                                   -----     -----     -----
    Net pension cost.............................................  $ 0.8     $ 0.6     $ 0.8
                                                                   =====     =====     =====
</TABLE>
 
     The funded status of the plans using the projected unit credit method is:
 
<TABLE>
<CAPTION>
                              AT DECEMBER 31,                            1996        1995
                                                                         -----       -----
                                                                            (DOLLARS IN
                                                                             MILLIONS)
    <S>                                                                  <C>         <C>
    Assets and obligations:
      Vested benefit obligation........................................  $ 5.3       $ 5.2
      Nonvested benefits...............................................    0.5         0.5
                                                                         -----       -----
         Accumulated benefit obligation................................    5.8         5.7
    Plan assets at fair value..........................................    5.0         4.4
                                                                         -----       -----
    Plan assets less than accumulated benefit obligation...............    0.8         1.3
                                                                         =====       =====
    Projected benefit obligation (PBO).................................    7.2         7.1
    Plan assets at fair value..........................................    5.0         4.4
                                                                         -----       -----
      Plan assets less than PBO........................................    2.2         2.7
    Minimum liability..................................................    0.5         1.4
    Prior service cost.................................................    0.1         0.1
    Initial net plan obligation........................................   (2.1)       (2.3)
    Effect of changes in assumptions and actuarial gains and losses....    0.2        (0.5)
                                                                         -----       -----
      Pension liability reflected on consolidated balance sheet........  $ 0.9       $ 1.4
                                                                         =====       =====
</TABLE>
 
     The actuarial computations are based upon a discount rate on benefit
obligations of 7%, an expected long-term rate of return on plan assets of 8% and
expected annual salary increases of 4%.
 
     Postretirement Benefits:
 
     The postretirement health care plan for retired salaried employees eligible
for Medicare was adopted by the Company on May 1, 1996. Secondary coverage under
the Company's plan is available for all retired salaried employees who are
permanently residing in the United States and who contribute amounts as defined
by the plan.
 
                                      F-16
<PAGE>   131
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
16. BENEFIT PLANS -- (CONTINUED)
     Net periodic postretirement benefit costs include the following:
 
<TABLE>
<CAPTION>
                       FOR THE YEAR ENDED DECEMBER 31,              1996
                                                                ------------
                                                                (DOLLARS IN
                                                                 MILLIONS)
                <S>                                             <C>
                Service and interest cost.....................      $0.1
                Amortization of prior service cost............       0.1
                                                                   -----
                Net periodic postretirement benefit cost......      $0.2
                                                                   =====
</TABLE>
 
     The following sets forth the plan's status reconciled with amounts reported
in the Consolidated Balance Sheet:
 
<TABLE>
<CAPTION>
                               AT DECEMBER 31,                          1996
                                                                    ------------
                                                                    (DOLLARS IN
                                                                     MILLIONS)
            <S>                                                     <C>
            Accumulated postretirement benefit obligation ("APBO")
              Retirees............................................     $  0.2
              Fully eligible active plan participants.............        0.1
              Other plan participants.............................        0.6
                                                                        -----
            Total APBO............................................        0.9
            Item not yet recognized in earnings:
              Prior service cost..................................       (0.7)
                                                                        -----
            Postretirement benefit obligation.....................     $  0.2
                                                                        =====
</TABLE>
 
     The annual assumed rate of increase in the per capita cost of covered
benefits (i.e. health cost trend rate) is 6% for 1997 and is assumed to decrease
gradually to 5% by 1999 and remain at that level thereafter. The health care
cost trend rate assumption has a significant effect on the amounts reported. For
example, increasing the assumed health care cost trend rates by one percentage
point in each year would increase the accumulated postretirement benefit
obligation at December 31, 1996 by $0.1 million and would have no material
effect on the net periodic postretirement benefit costs for 1996. The discount
rate used in determining the accumulated postretirement benefit obligation was
7% at December 31, 1996. The plan is unfunded.
 
17. STOCKHOLDERS' EQUITY
 
     Common Stock:
 
     The stockholders of the Company at December 31, 1996 were:
 
<TABLE>
<CAPTION>
                                                                                  PERCENT OF
                                                                 OUTSTANDING     TOTAL NUMBER
                                                                   SHARES         OF SHARES
                                                                 -----------     ------------
    <S>                                                          <C>             <C>
    Class A Common Shares:
      ASARCO Incorporated......................................   43,348,949         54.06%
      Cerro Trading Company, Inc...............................   12,028,088         15.00
      Phelps Dodge Overseas Capital Corporation................   11,173,796         13.94
                                                                  ----------        ------
                                                                  66,550,833         83.00%
    Common Shares..............................................   13,633,674         17.00%
                                                                  ----------        ------
              Total............................................   80,184,507        100.00%
                                                                  ==========        ======
</TABLE>
 
                                      F-17
<PAGE>   132
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
17. STOCKHOLDERS' EQUITY -- (CONTINUED)
     On February 27, 1996, Cerro Trading Company, Inc. transferred 2,200,000
Class A common stock shares to The Pritzker Family Philanthropic Fund. In
accordance with the Company's Certificate of Incorporation these shares were
automatically converted into common stock of the Company.
 
     Stock Options:
 
     The Company has two stockholder approved plans, a Stock Incentive Plan and
a Directors Stock Award Plan. The Stock Incentive Plan provides for the granting
of nonqualified or incentive stock options, as defined under the Internal
Revenue Code of 1986, as amended, as well as for the award of restricted stock
and bonuses payable in stock. The price at which options may be granted under
the Stock Incentive Plan shall not be less than 100% of the fair market value of
the common stock on the date of grant in the case of incentive stock options, or
50% in the case of other options. In general, options are not exercisable for
six months and expire after 10 years from the date of grant.
 
     Options granted may provide for Stock Appreciation Rights ("SAR"). An SAR
permits an optionee, in lieu of exercising the option, to receive from the
Company payment of an amount equal to the difference between the market value of
the stock on the date of election of the SAR and the purchase price of the stock
under the terms of the option.
 
     The authorized number of shares under the Stock Incentive Plan is 1,000,000
of which 300,000 may be awarded as restricted stock. At December 31, 1996,
927,110 shares are available for future grants under this plan.
 
     The Directors Stock Award Plan provides that directors who are not
compensated as employees of the Company will be automatically awarded 200 shares
of common stock upon election and 200 additional shares following each annual
meeting of stockholders thereafter. 100,000 shares have been reserved for awards
under the Directors Plan. At December 31, 1996, 5,800 shares have been awarded
under this plan.
 
     The Company has elected the disclosure only requirements of SFAS No. 123,
"Accounting for Stock-Based Compensation". Accordingly, no compensation cost has
been recognized for the Stock Incentive Plan. Had compensation cost for the
Company's Stock Incentive Plan been determined based on the fair value at the
grant date for awards in 1996 consistent with the provisions of SFAS No. 123,
the effect on the Company's net earnings and earnings per share would have been
immaterial.
 
     The fair value of each option grant was estimated on the date of grant
using the Black-Scholes option-pricing model with the following assumptions used
for grants in 1996: dividend yield of 6.57%; expected volatility of 28.4%;
risk-free interest rate of 6.17%; and expected life of 6.9 years.
 
18. RELATED PARTIES
 
     Asarco, a stockholder of the Company, provides principally legal, tax,
treasury and administrative support services to the Company. The amounts paid to
Asarco for these services were $0.8 million, $0.3 million and $0.2 million in
1996, 1995, and 1994, respectively.
 
19. CONCENTRATION OF RISK
 
     The Company operates two copper mines, a smelter and two refineries in Peru
and substantially all of its assets are located there. There can be no
assurances that the Company's operations and assets that are subject to the
jurisdiction of the government of Peru may not adversely be affected by future
actions by such government. Substantially all of the sales of the Company's
products are exported from Peru to customers principally in Europe, the Pacific
Rim and the United States.
 
                                      F-18
<PAGE>   133
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
19. CONCENTRATION OF RISK -- (CONTINUED)
     Financial instruments which potentially subject the Company to a
concentration of credit risk consist primarily of cash and cash equivalents,
marketable securities and trade accounts receivable.
 
     The Company invests or maintains available cash with various high quality
banks, principally in the U.S., Canada and Peru, or in commercial paper of
highly rated companies. As part of its cash management process, the Company
regularly monitors the relative credit standing of these institutions, and by
policy, limits the amount of credit exposure to any one institution. At December
31, 1996, the Company had invested 40.9% of its cash equivalents and marketable
securities with Peruvian banks, of which 21.7% of this amount was invested with
one institution.
 
     During the normal course of business, the Company provides credit to its
customers. Although the receivables resulting from these transactions are not
collateralized, the Company has not experienced significant problems with the
collection of receivables.
 
     The largest ten trade receivable balances accounted for 56.6% of the trade
accounts receivable at December 31, 1996 of which one customer represented
11.5%.
 
20. COMMITMENTS AND CONTINGENCIES
 
     Cuajone Investment Recovery:
 
     In December 1991, the Company and the Government of Peru signed an
agreement the ("1991 Agreement") resolving all open issues concerning the
conclusion of the investment recovery contract which governed the development
and operation of the Cuajone mine. The Company agreed to undertake an investment
program over the five years, 1992-1996, and the Peruvian Government agreed not
to discriminate against the Company in comparison with treatment given to other
mining companies. As part of the 1991 Agreement, in 1991 the Company transferred
$55.0 million from its accounts in New York to an interest-bearing account with
the Central Reserve Bank of Peru, to be withdrawn by the Company at its
discretion solely for application to the investment program. In March 1995,
these funds, aggregating $61.1 million, including accumulated interest, were
transferred to the Branch as a capital contribution and used for the capital
spending program. In conjunction with the transfer, labor shareholders
contributed $10.9 million to the capital of the Branch.
 
     At December 31, 1996, the Company had expended $443.6 million under the
five-year capital program agreed to with the Peruvian Government and has met its
obligations under the agreement.
 
     Environmental:
 
     As part of the 1991 Agreement, the Company has made a significant number of
environmental capital expenditures, including, a sulfuric acid plant at the Ilo
smelter for partial recapture of emissions of sulfur dioxide, completed in 1995
at a cost of $103.0 million, a sewage treatment plant at Ilo, completed in 1994
at a cost of $2.0 million, and a tailings storage facility at Quebrada Honda,
which was completed in 1996 at a cost of $40.8 million. The Company also has
incurred capital costs of $3.0 million for environmental projects committed with
the Ilo refinery acquisition. In addition, in April 1996 the Company began a $35
million expansion of the Ilo sulfuric acid plant. The expansion will increase
the capture of sulfur dioxide emissions from the smelter from 18% to 30% and
will also increase sulfuric acid production at the smelter to 330,000 tons per
year in 1998, the expected year of expanded plant operation. Capital
expenditures in connection with these and other environmental projects were
approximately $29.8 million in 1996.
 
     The Company's exploration, mining, milling, smelting and refining
activities are subject to Peruvian laws and regulations, including environmental
laws and regulations, which change from time to time. The Company's recently
approved environmental compliance and management plan, PAMA, sets forth the
investment to be made by the Company to comply with current Peruvian
environmental regulations applicable to its operations. To
 
                                      F-19
<PAGE>   134
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
20. COMMITMENTS AND CONTINGENCIES -- (CONTINUED)
implement the PAMA, the Company is required to make a minimum annual investment
of 1% of net annual sales until compliance is met. The PAMA will require the
Company to make significant additional capital expenditures to achieve
compliance with the maximum permissible levels for its emission and waste
discharges ("MPLs") within a period of five years, except for environmental
controls applicable to its smelter operation which must be put in place within
10 years. The PAMA contemplates a number of environmental projects, the largest
and most capital intensive of which is the planned modernization of the Ilo
smelter. Management believes that under current Peruvian law and regulations,
compliance with the PAMA will satisfy the MPL requirements pertaining to the
Company's operations during the applicable five- or 10-year implementation
period. The Company remains, however, subject to other environmental
requirements applicable to its operations.
 
     Litigation:
 
     In February 1993, the Mayor of Tacna brought a lawsuit against SP Limited
seeking $100 million in damages from alleged harmful deposition of tailings,
slag and smelter emissions. On May 3, 1996, the Superior Court of Tacna, Peru
affirmed the lower court's dismissal. In May 1996, the plaintiff appealed and
the case presently is before the Peruvian Supreme Court. There is generally no
further right of appeal, however, the Peruvian Supreme Court may grant
discretionary review on limited issues in exceptional cases.
 
     In April 1996, SP Limited was served with a complaint filed in Peru by
approximately 800 former employees challenging the accounting of the Company's
Peruvian Branch and its allocation of financial results to the Mining Community,
the former legal entity representing workers in Peruvian mining companies, in
the 1970's. The complaint seeks the delivery of a substantial number of labor
shares of the Peruvian Branch plus dividends and contains similar allegations to
those made in a prior lawsuit dismissed in September 1995. In August 1996, 64
additional former employees filed a similar lawsuit. SP Limited, other present
and former corporate shareholders of SP Limited and certain other companies are
defendants in a lawsuit in federal district court in Corpus Christi, Texas
brought in September 1995 by 698 Peruvian plaintiffs seeking damages for
personal injury and property damage allegedly caused by the operations of SP
Limited in Peru. Plaintiffs have appealed from the district court order
dismissing the complaint and from an earlier order of that court denying
plaintiffs' motion to remand the case to state court. Oral arguments were heard
in December 1996 and the appellate court's decision is pending.
 
     It is the opinion of management that the outcome of the legal proceedings
mentioned, as well as other miscellaneous litigation and proceedings now
pending, will not materially adversely affect the financial position of the
Company and its consolidated subsidiaries. However, it is possible that
litigation matters could have a material effect on quarterly or annual operating
results, when they are resolved in future periods.
 
                                      F-20
<PAGE>   135
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
21. SUMMARIZED FINANCIAL INFORMATION OF SIGNIFICANT SUBSIDIARY
 
     The condensed consolidated financial information for Southern Peru Limited,
a wholly owned subsidiary of Southern Peru Copper Corporation, included in the
consolidated financial statements of the Company, is summarized below:
 
<TABLE>
<CAPTION>
               FOR THE YEARS ENDED DECEMBER 31,               1996        1995        1994
                                                             -------     -------     -------
                                                                  (DOLLARS IN MILLIONS)
    <S>                                                      <C>         <C>         <C>
    STATEMENT OF EARNINGS AND CASH FLOW
    Earnings:
      Net Sales............................................  $ 753.0     $ 928.8     $ 701.7
      Operating income.....................................    248.8       366.7       142.0
      Net earnings.........................................  $ 180.5     $ 217.8     $  91.2
    Cash Flow:
      Operating activities.................................  $ 158.8     $ 330.4     $ 134.9
      Investing activities.................................    (79.3)     (119.5)     (138.8)
      Financing activities.................................   (127.6)      (86.1)       64.7
</TABLE>
 
<TABLE>
<CAPTION>
                             AT DECEMBER 31,                             1996        1995
                                                                       --------     ------
                                                                           (DOLLARS IN
                                                                            MILLIONS)
    <S>                                                                <C>          <C>
    BALANCE SHEET
    Current assets...................................................  $  403.1     $482.8
    Non current assets...............................................     876.7      788.9
    Current liabilities..............................................     105.3      170.4
    Noncurrent liabilities...........................................     137.1      122.9
    Minority interest................................................      22.4       25.0
    Stockholders' equity.............................................   1,015.0      953.5
</TABLE>
 
     Southern Peru Limited, a wholly owned subsidiary of Southern Peru Copper
Corporation, holds all the operating assets and liabilities of the Company and
does not hold any other operating assets. Accordingly, the effect of the
exchange offer described in note 2 has been reflected in the summary financial
information presented above.
 
22. SUBSEQUENT EVENT
 
     On February 21, 1997, the Company entered into agreements with Powerfin
Peru S.A., a wholly owned subsidiary of Tractebel S.A. ("Tractebel") for the
sale of a new turbine at its Ilo power plant and a twenty year power purchase
agreement for its copper operations in Peru. Negotiations are being finalized
covering the sale of the Company's existing power plant assets. Closing of the
transaction is subject to obtaining necessary Peruvian government approvals.
 
                                      F-21
<PAGE>   136
 
               REPORT OF INDEPENDENT ACCOUNTANTS WITH RESPECT TO
         UNAUDITED CONDENSED CONSOLIDATED INTERIM FINANCIAL STATEMENTS
 
To the Board of Directors and Stockholders of
Southern Peru Copper Corporation:
 
     We have reviewed the condensed consolidated balance sheet of SOUTHERN PERU
COPPER CORPORATION and SUBSIDIARIES as of June 30, 1997 and the condensed
consolidated statements of earnings and cash flows for the three month and six
month periods ended June 30, 1997 and 1996. These financial statements are the
responsibility of the Company's management.
 
     We conducted our review in accordance with standards established by the
American Institute of Certified Public Accountants. A review of interim
financial information consists principally of applying analytical procedures to
financial data and making inquiries of persons responsible for financial and
accounting matters. It is substantially less in scope than an audit conducted in
accordance with generally accepted auditing standards, the objective of which is
the expression of an opinion regarding the financial statements taken as a
whole. Accordingly, we do not express such an opinion.
 
     Based on our review, we are not aware of any material modifications that
should be made to the condensed consolidated financial statements referred to
above for them to be in conformity with generally accepted accounting
principles.
 
     We have previously audited, in accordance with generally accepted auditing
standards, the consolidated balance sheet as of December 31, 1996, and the
related consolidated statements of income, retained earnings, and cash flows for
the year then ended (not presented herein); and in our report dated January 28,
1997 we expressed an unqualified opinion on those consolidated financial
statements. In our opinion, the information set forth in the accompanying
condensed consolidated balance sheet as of December 31, 1996, is fairly stated,
in all material respects, in relation to the consolidated balance sheet from
which it has been derived.
 
                                          COOPERS & LYBRAND L.L.P.
 
New York, New York
July 21, 1997
 
                                      F-22
<PAGE>   137
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                  CONDENSED CONSOLIDATED STATEMENT OF EARNINGS
                FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND 1996
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                         1997           1996
                                                                       --------       --------
                                                                           (IN THOUSANDS,
                                                                          EXCEPT PER SHARE
                                                                              AMOUNTS)
<S>                                                                    <C>            <C>
Net sales:
  Stockholders and affiliates........................................  $ 38,415       $ 31,248
  Others.............................................................   402,593        338,329
                                                                       --------       --------
          Total net sales............................................   441,008        369,577
                                                                       --------       --------
Operating costs and expenses:
  Cost of sales......................................................   228,296        176,855
  Administrative and other expenses..................................    26,668         24,254
  Depreciation, amortization and depletion...........................    23,107         20,670
  Provision for workers' participation...............................    10,875         10,445
  Exploration expense................................................     2,712          1,147
                                                                       --------       --------
          Total operating costs and expenses.........................   291,658        233,371
                                                                       --------       --------
  Operating income...................................................   149,350        136,206
 
Interest income......................................................     7,679         11,070
Other income.........................................................     4,660          4,855
Interest expense.....................................................    (7,268)        (6,337)
                                                                       --------       --------
Earnings before taxes on income and minority interest of labor          
  shares.............................................................   154,421        145,794
Taxes on income......................................................    35,587         48,093
                                                                       --------       --------
Earnings before minority interest of labor shares....................   118,834         97,701
Minority interest of labor shares....................................     3,418          3,364
                                                                       --------       --------
Net earnings.........................................................  $115,416       $ 94,337
                                                                       ========       ========
Per common share amounts:
  Net earnings(a)....................................................  $   1.44       $   1.18
  Dividends paid.....................................................  $   0.65       $   0.95
  Weighted average number of shares outstanding......................    80,197         80,204
</TABLE>
 
- ---------------
(a) The effect of the calculation of net earnings per common share of the
    Company's Common Stock equivalents (shares under option) was insignificant.
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-23
<PAGE>   138
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                      CONDENSED CONSOLIDATED BALANCE SHEET
                     AT JUNE 30, 1997 AND DECEMBER 31, 1996
 
<TABLE>
<CAPTION>
                                                                         1997            1996
                                                                      -----------     ----------
                                                                      (UNAUDITED)
                                                                            (IN THOUSANDS)
<S>                                                                   <C>             <C>
ASSETS
Current assets:
  Cash and cash equivalents.........................................  $   210,323     $  173,205
  Marketable securities.............................................      208,792          1,000
  Accounts receivable, net..........................................      101,140         89,587
  Inventories.......................................................      121,391        118,681
  Prepaid taxes.....................................................       81,300         14,019
  Other current assets..............................................        6,128          6,618
                                                                       ----------     ----------
     Total current assets...........................................      729,074        403,110
Net property........................................................      854,632        855,808
Other assets........................................................       29,108         20,931
                                                                       ----------     ----------
          Total Assets..............................................  $ 1,612,814     $1,279,849
                                                                       ==========     ==========
LIABILITIES
Current liabilities:
  Current portion of long-term debt.................................  $    23,683     $   23,683
  Accounts payable..................................................       52,190         33,864
  Accrued liabilities...............................................       44,385         47,768
                                                                       ----------     ----------
     Total current liabilities......................................      120,258        105,315
                                                                       ----------     ----------
Long-term debt......................................................      271,050         82,892
Deferred credits....................................................       69,780             --
Deferred income taxes...............................................       47,363         49,426
Other liabilities and reserves......................................        3,952          4,806
                                                                       ----------     ----------
     Total non-current liabilities..................................      392,145        137,124
                                                                       ----------     ----------
Minority interest of labor shares...................................       22,094         22,383
                                                                       ----------     ----------
STOCKHOLDERS' EQUITY
Common stock, par value $0.01(a)....................................          143            137
Class A common stock, par value $0.01(b)............................          659            666
Additional paid-in capital..........................................      265,745        265,745
Retained earnings...................................................      812,242        749,267
Treasury stock at cost (c)..........................................         (472)          (788)
                                                                       ----------     ----------
          Total stockholders' equity................................    1,078,317      1,015,027
                                                                       ----------     ----------
          Total Liabilities, Minority Interest and Stockholders'
            Equity..................................................  $ 1,612,814     $1,279,849
                                                                       ==========     ==========
(a) Common shares: Authorized.......................................       34,099         33,449
                      Outstanding...................................       14,302         13,634
(b) Class A common shares Authorized & Outstanding..................       65,901         66,551
(c) Treasury stock common shares....................................           28             46
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-24
<PAGE>   139
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
                 CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
                FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND 1996
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                           1997         1996
                                                                         --------     --------
                                                                            (IN THOUSANDS)
<S>                                                                      <C>          <C>
OPERATING ACTIVITIES
  Net earnings.........................................................  $115,416     $ 94,337
  Adjustments to reconcile net earnings to net cash provided from
     operating activities:
     Depreciation, amortization and depletion..........................    23,107       20,670
     Provision for deferred income taxes...............................    (1,955)       2,216
     Minority interest of labor shares.................................     3,417        3,364
     Net loss on sale of investments and property......................       268          286
     Cash provided from (used for) operating assets and liabilities:
       Accounts receivable.............................................   (11,594)      37,635
       Inventories.....................................................    (2,710)      (4,830)
       Accounts payable and accrued liabilities........................    16,674      (52,898)
       Other operating assets and liabilities..........................     3,342      (17,073)
       Foreign currency transaction gain...............................    (1,035)      (2,428)
                                                                         --------     --------
          Net cash provided from operating activities..................   144,930       81,279
                                                                         --------     --------
INVESTING ACTIVITIES
  Capital expenditures.................................................   (61,354)     (51,931)
  Purchases of held-to-maturity investments............................  (208,792)          --
  Proceeds from held-to-maturity investments...........................     1,000       42,453
  Proceeds from the sale of investments and property...................    41,885           --
                                                                         --------     --------
          Net cash used for investing activities.......................  (227,261)      (9,478)
                                                                         --------     --------
FINANCING ACTIVITIES
  Dividends paid.......................................................   (52,125)     (76,204)
  Proceeds from borrowings.............................................   200,000       47,000
  Repayment of borrowings..............................................   (11,842)      (8,531)
  Escrow deposits and finance fees on long-term loans..................   (11,878)     (10,152)
  Purchase of labor share interest.....................................    (4,606)      (2,681)
  Distributions to minority interests..................................    (1,303)      (2,703)
  Net treasury stock transactions......................................        --       (1,155)
                                                                         --------     --------
          Net cash provided for (used for) financing activities........   118,246      (54,426)
                                                                         --------     --------
Effect of exchange rate changes on cash................................     1,203          716
                                                                         --------     --------
Net increase in cash and cash equivalents..............................    37,118       18,091
Cash and cash equivalents, beginning of period.........................   173,205      219,646
                                                                         --------     --------
Cash and cash equivalents, end of period...............................  $210,323     $237,737
                                                                         ========     ========
</TABLE>
 
   The accompanying notes are an integral part of these financial statements.
 
                                      F-25
<PAGE>   140
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)
 
A. In the opinion of the Company, the accompanying unaudited consolidated
   financial statements contain all adjustments (consisting only of normal
   recurring adjustments) necessary to present fairly the Company's financial
   position as of June 30, 1997 and the results of operations and cash flows for
   the six months ended June 30, 1997 and 1996. This financial data has been
   subjected to a limited review by Coopers & Lybrand L.L.P., the Company's
   independent accountants. The results of operations for the six month period
   are not necessarily indicative of the results to be expected for the full
   year. The year end condensed consolidated balance sheet data was derived from
   audited financial statements, but does not include all disclosures required
   by generally accepted accounting principles. The accompanying unaudited
   consolidated financial statements should be read in conjunction with the
   consolidated financial statements and notes thereto included in the Company's
   1996 annual report on Form 10-K.
 
B. In the first quarter of 1997, the Government of Peru approved a reinvestment
   allowance for the Company's program to expand the Cuajone mine. The
   reinvestment allowance provides the Company with tax incentives in Peru and,
   as a result, certain U.S. tax credit carryforwards, for which no benefit has
   previously been recorded, are expected to be realized. The estimated net
   earnings impact of the reduction in the Company's effective tax rate, as a
   result of the reinvestment allowance, for the six months ended June 30, 1997
   is approximately $7.7 million. Pursuant to the reinvestment allowance the
   Company will receive tax deductions in Peru in amounts equal to the cost of
   the qualifying property (approximately $245 million). As qualifying property
   is acquired, the financial statement carrying value of the qualifying
   property will be reduced to reflect the tax benefit associated with the
   reinvestment allowance (approximately $73 million). As a result, financial
   statement depreciation expense related to the qualifying property will be
   reduced over its useful life (approximately 15 years).
 
C. INVENTORIES WERE AS FOLLOWS:
 
<TABLE>
<CAPTION>
                                                               AT JUNE 30,      AT DECEMBER 31,
                                                                  1997               1996
                                                              -------------     ---------------
                                                                        (IN MILLIONS)
    <S>                                                       <C>               <C>
    Metals at lower of average cost or market:
      Finished goods........................................     $   1.4            $   2.4
      Work-in-process.......................................        48.8               47.1
    Supplies at average cost, net of reserves...............        71.2               69.2
                                                                  ------             ------
    Total inventories.......................................     $ 121.4            $ 118.7
                                                                  ======             ======
</TABLE>
 
D. METAL HEDGING ACTIVITIES:
 
     Depending on the market fundamentals of a metal and other conditions, the
Company may purchase put options to reduce or eliminate the risk of metal price
declines on a portion of its anticipated future production. Put options
purchased by the Company establish a minimum sales price for the production
covered by such put options and permit the Company to participate in price
increases above the option price. Depending upon market conditions the Company
may sell put options it holds or exercise the options at maturity. Gains or
losses, net of unamortized acquisition costs are recorded as current liabilities
or current assets and are subsequently recognized in the period in which the
underlying hedged production is sold.
 
                                      F-26
<PAGE>   141
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
 
D. METAL HEDGING ACTIVITIES -- (CONTINUED)
     Earnings for the first six months included a pre-tax gain of $5.6 million
in 1997 and a pre-tax loss of $0.3 million in 1996 from the Company's price
protection program. There were no pre-tax gains or losses from price protection
in the second quarter of 1997 compared with a pre-tax gain of $0.5 in the second
quarter of 1996.
 
                 COPPER PRICE PROTECTION HELD AT JUNE 30, 1997
                     (IN MILLIONS, EXCEPT PER LB. AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                                           PERCENT OF
                                                          STRIKE PRICE     UNAMORTIZED     ESTIMATED
                  POUNDS                     PERIOD        PER POUND          COST         PRODUCTION
    -----------------------------------   ------------    ------------     -----------     ----------
    <S>                                   <C>             <C>              <C>             <C>
    94.1...............................   10/97-12/97        $ 0.95           $ 1.4            54%
    44.0...............................    1/98-3/98         $ 0.95             0.6            28%
                                                                              $ 2.0
</TABLE>
 
     At June 30, 1997, the Company has recorded sales of 73.6 million pounds of
copper, at a provisional price of $1.17 per pound. These sales are subject to
final pricing based on the average monthly LME copper price, principally in the
third quarter of 1997.
 
E. On May 22, 1997, the Company sold $150 million of Secured Export Notes
through a Rule 144A and Regulation S offering with registration rights. The
notes mature in 2007 and were priced at par with a coupon rate of 7.90%. On June
24, 1997, the Company sold $50 million of 8.25% bonds due June 2004. The debt
was issued through Southern Peru Limited, a wholly owned subsidiary of the
Company. Early in the second quarter, the Company also entered into a $600
million, seven year backstop loan facility with a group of international
financial institutions. The proceeds of the aforementioned borrowings will be
used to finance the Company's $1 billion expansion and modernization program at
its Cuajone copper mine and Ilo smelter.
 
F. COMMITMENTS AND CONTINGENCIES:
 
     Litigation
 
     In February 1993, the Mayor of Tacna, Peru, brought a lawsuit against SP
Limited seeking $100 million in damages from alleged harmful deposition of
tailings, slag and smelter emissions. On May 3, 1996, the Superior Court of
Tacna, Peru affirmed the lower court's dismissal. In May 1996, the plaintiff
appealed and the case presently is before the Peruvian Supreme Court. There is
generally no further right of appeal, however, the Peruvian Supreme Court may
grant discretionary review on limited issues in exceptional cases.
 
     In April 1996, SP Limited was served with a complaint filed in Peru by
approximately 800 former employees challenging the accounting of the Company's
Peruvian Branch and its allocation of financial results to the Mining Community,
the former legal entity representing workers in Peruvian mining companies, in
the 1970's. The complaint seeks the delivery of a substantial number of labor
shares of the Peruvian Branch plus dividends and contains similar allegations to
those made in a prior lawsuit dismissed in September 1995. As of March 31, 1997,
127 additional former employees filed a similar lawsuit. During the second
quarter of 1997, SP Limited was served with an adverse opinion by the lower
court. Peruvian outside counsel has informed SP Limited that the lower court
decision is not supported by facts or law and that the possibility that it will
not be reversed or nullified by Peruvian Courts following appeal is remote. An
appeal was filed during the second quarter of 1997.
 
                                      F-27
<PAGE>   142
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
 
G. SUMMARIZED FINANCIAL INFORMATION OF SIGNIFICANT SUBSIDIARY:
 
     Southern Peru Limited:  Southern Peru Limited is a wholly owned subsidiary
of Southern Peru Copper Corporation. Southern Peru Limited holds all the
operating assets and liabilities of the Company.
 
<TABLE>
<CAPTION>
                                                                         SIX MONTHS ENDED
                                                                             JUNE 30,
                                                                        ------------------
                                                                         1997        1996
                                                                        -------     ------
                                                                          (IN MILLIONS)
    <S>                                                                 <C>         <C>
    STATEMENT OF EARNINGS AND CASH FLOW
    Earnings:
      Net sales.......................................................  $ 441.0     $369.6
      Operating income................................................    149.4      136.2
      Net earnings....................................................  $ 115.4     $ 94.3
    Cash flow:
      Operating activities............................................  $ 143.6     $ 78.6
      Investing activities............................................   (227.3)      (9.5)
      Financing activities............................................  $ 119.5     $(51.7)
</TABLE>
 
<TABLE>
<CAPTION>
                                                               AT JUNE 30,      AT DECEMBER 31,
                                                                   1997              1996
                                                               ------------     ---------------
                                                                        (IN MILLIONS)
    <S>                                                        <C>              <C>
    BALANCE SHEET
    Current assets...........................................    $  729.1          $   403.1
    Noncurrent assets........................................       883.7              876.7
    Current liabilities......................................       120.3              105.3
    Noncurrent liabilities...................................       392.1              137.1
    Minority interest........................................        22.1               22.4
    Stockholders' equity.....................................     1,078.3            1,015.0
</TABLE>
 
H. On April 18, 1997, the Company completed the sale of its Ilo power plant to a
subsidiary of Tractebel S.A. ("Tractebel"), for $41.9 million. In connection
with the sale, a twenty-year power purchase agreement was also completed, under
which Tractebel will provide the Company with its power needs for the next
twenty years. Under the agreement, the Company's cost of power will increase
somewhat from its current level, while the Company will benefit by avoiding
significant capital expenditures that would be required to meet the needs of
expanded operations.
 
I. IMPACT OF NEW ACCOUNTING STANDARD:
 
     In February 1997, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards 128, "Earnings Per Share" (the "Statement").
The Statement specifies the computation, presentation and disclosure
requirements for earnings per share ("EPS"). It will require the Company to
present both basic and diluted EPS amounts for income from continuing operations
and net income on the face of the income statement. The Company does not expect
the impact of this statement to have a material effect on its calculation of
EPS. The statement will be effective for financial statements issued for periods
ending after December 15, 1997, including interim periods.
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 "Reporting Comprehensive Income". The
Company is currently assessing the impact of this statement, which is effective
for fiscal years beginning after December 15, 1997.
 
                                      F-28
<PAGE>   143
 
               SOUTHERN PERU COPPER CORPORATION AND SUBSIDIARIES
 
      NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
                                  (UNAUDITED)
 
J. SUBSEQUENT EVENTS:
 
     On July 31, 1997, the Company prepaid the remaining $40.0 million balance
on a variable rate loan from Mitsui & Co., Ltd. The payment will result in a
charge of $0.4 million for unamortized loan fees.
 
                                      F-29
<PAGE>   144
 
                                                                         ANNEX A
 
                              THE REPUBLIC OF PERU
 
     The information in this Annex A is based upon material obtained from public
sources, including publications and materials from participants in the Peruvian
securities markets and financial sector. The information is believed to be
accurate but has not been independently verified by SP Limited, SPCC, the
Initial Purchasers, or any of their respective advisors.
 
TERRITORY AND POPULATION
 
     The Republic of Peru, with a total area of 1.3 million square kilometers,
is the third largest country in South America. It borders with the Pacific ocean
to the West, Ecuador and Colombia to the North, Brazil to the East, and Bolivia
and Chile to the South. The Amazon jungle extends throughout a large part of the
territory, and another considerable portion is occupied by the Andes mountains.
The total estimated population is 25.5 million as of December 1995, which makes
Peru the fourth most populous country in South America. As of 1995, 29.9% of
Peruvians lived in rural areas, while 70.1% resided in urban areas, with close
to 7 million people living in Peru's capital, Lima, and its vicinity. Lima is
located on the central coast, next to the port of Callao. One third of the
Peruvian labor force is based in the Lima area, where the country's economic
activity is concentrated. A large percentage of the Peruvian workforce labors in
low productivity informal activities. In 1994, the literacy rate was 87.2%.
Although Spanish is the official language of Peru and is spoken by the great
majority of the population, Quechua, Aymara, and other indigenous languages are
also spoken extensively in some areas.
 
RECENT HISTORY
 
     Between 1960 and 1990, two political parties, Accion Popular ("AP") and
Alianza Popular Revolucionaria Americana ("APRA"), dominated Peruvian politics.
AP governed Peru from 1963-68, and again from 1980-85. In 1968, democracy was
interrupted by a left wing military coup. Many foreign firms were nationalized,
and government intervention in the economy increased dramatically until the late
1970s, when the economic situation deteriorated rapidly. A new constitution was
passed in 1979. In that year, a major terrorist movement began a campaign of
violence against the government and citizens of Peru, followed in 1983 by a
second terrorist group. In 1985, a young APRA leader was elected president for a
five-year term. Amid massive state intervention and growing violence, the
economy deteriorated rapidly beginning in 1988.
 
     The 1990 Presidential election displaced traditional parties with the
election of the current president, a political outsider who won the presidency
as an independent candidate. The current government dramatically changed the
economic environment by embracing free market policies and made substantial
progress in suppressing terrorist activity, including the arrest (and
imprisonment for life) of the leaders and principal lieutenants of both
terrorist groups in 1992.
 
     In 1992, Congress was dissolved and the election of a new congressional
body that would be responsible for the drafting of a new Constitution took
place. The new Peruvian Constitution was approved by a public referendum on
October 31, 1993, became effective on December 31, 1993, and remains the charter
governing Peru today.
 
GOVERNMENT AND POLITICAL SYSTEM
 
     Under the new Constitution, the executive power rests with the president,
under whom there are two vice-presidents. The legislature consists of a
unicameral congressional body, composed of 120 representatives who are elected
nationally. The president and representatives are each elected for concurring
five-year terms. The judicial power rests with the Supreme Court, whose members
are appointed by the Consejo Nacional de la Magistratura, a committee consisting
of members of various public institutions. In addition to this structure at the
national level, there are provincial and district municipalities that are
governed by mayors who are elected for terms that currently stand at three years
but will be extended to four and then five years in the following two elections.
 
                                       A-1
<PAGE>   145
 
     In April 1995, the incumbent was elected to a second five-year term with
64% of the vote. The administration's political party, the Cambio 90-Nueva
Mayora also obtained a majority vote in the Congressional election and currently
holds a majority in Congress. Since taking office again in July 1995, the
current administration has continued to implement political and economic
reforms.
 
THE PERUVIAN ECONOMY
 
     In the last years of the previous administration, Peru's economy
deteriorated dramatically. Inflation reached 1,772% in 1988 and 2,775% in 1989.
Price increases exceeded 100% per month in July of 1990. GDP declined rapidly
during the same period (-8.8% in 1988 and -11.6% in 1989), and by the middle of
1990, national production had fallen to the levels of the mid-1970s, while per
capita GDP fell to the levels of the early 1960s. Peru was also isolated from
the international financial system as a result of its failure to service its
foreign debt, including debt due to the International Monetary Fund ("IMF") and
the World Bank. In addition, by mid-1990, tax revenues had collapsed to 5.9% of
GDP, price and wage controls were widespread, multiple exchange rates and
capital controls were in place, and a complex web of high tariffs, import
prohibitions and quotas existed. All public utilities were in state hands, as
were large parts of banking, mining, oil and fishing activities.
 
     Shortly after taking office in July 1990, the current government launched
an economic stabilization and restructuring program. The government eliminated
all price controls, substantially reduced wage controls, eliminated restrictions
on capital flows, freed the exchange rate, liberalized imports, controlled
monetary expansion and instituted emergency taxes to reduce the fiscal deficit.
Further, the government established an agenda to reform and reduce government
institutions (including drastic deregulation), instituted a wide-ranging
privatization plan, and sought to re-establish relations with the international
financial community.
 
     The results of this stabilization and restructuring program have been
dramatic. Inflation fell from a high of 7,650% in 1990 to 39.5% in 1993, 15.4%
in 1994 and 10.2% in 1995. In 1996, the inflation rate was 11.8%. GDP in real
terms grew by 5.3% in 1993, 12.8% in 1994, 6.9% in 1995 and 2.5% in 1996. Direct
foreign investment grew from US$1.5 billion in 1992 to US$27 billion in 1996.
Private sector investment grew from 12.3% of GDP in 1990 to 17.6% of GDP in
1994, 19.7% of GDP in 1995 and 18.5% in 1996.
 
  Government Finances
 
     An important achievement of Peru's economic reform has been the improvement
of the fiscal deficit. The fiscal deficit dropped from 6.1% of the country's GDP
in 1989 to a 2.9% surplus in 1994, a 0.6% deficit in 1995, and a 1.1% surplus in
1996. The main factor driving this reduction has been the increase in government
current revenues from 9.2% of GDP in 1989 to 13.0% of GDP in 1994, 13.7% in 1995
and 14.1% in 1996. Revenues from privatization have also bolstered government
finances, representing an additional 4.7% of GDP in 1994, 1.6% of GDP in 1995
and 4.2% of GDP in 1996. Since 1990, neither the government nor the public
sector has received financing, directly or indirectly, from the Central Bank.
 
     The present administration has implemented an extensive program to improve
the Peruvian tax and tax collection system. After the emergency tax measures of
1990, a substantial simplification of the tax system was established. A complex
and inefficient tax system was replaced with four broad-based taxes: an 18%
value added tax, a 30% general corporate income tax (with a minimum asset-based
tax), a two-tier (15% and 25%) import tariff structure, and a selective tax
levied on fuels, alcoholic beverages, and a small number of other products. In
addition, the government has imposed strict sanctions for tax evasion and has
begun cross-referencing tax information with the assistance of a project
sponsored by the IMF. Tax authority has been restructured and is operating with
simpler and more efficient procedures and a better information system.
 
  The Privatization Program
 
     The present administration's economic reform also aimed at terminating the
state's direct participation in entrepreneurial activities. The privatization
program already has generated US$5 billion in proceeds. The largest
privatization to date occurred in February 1994, when a consortium consisting of
Telefonica de Espana and affiliates of Banco Wiese and Grana y Montero S.A. won
the bidding to obtain a 35% controlling stake in each of Peru's two
state-controlled telecommunications companies, CPT and ENTEL. The acquisition
price was US$2.2
 
                                       A-2
<PAGE>   146
 
billion. The government further divested its interest in these companies, now
merged into Telefonica del Peru, through a US$1.2 billion global offering in
July 1996.
 
     Other important privatizations have taken place. In July 1994, the
electricity distribution system of Lima, EDELNOR and EDELSUR (now Luz del Sur),
was privatized. The government sold 60% of the shares of these two companies for
US$389 million. In that same month, Interbanc, one of the state-owned commercial
banks, was sold for US$51 million. In October 1994, the Tintaya copper mine was
sold for US$218 million in cash and US$55 million of Peruvian debt. In November
1994, the Cajamarquilla zinc refinery was sold for US$153 million in cash and
US$40 million in Peruvian debt. In May 1995, the government sold 60% of Banco
Continental for US$196.7 million in cash and US$60 million of Peruvian debt. On
October 1995, 60% of EDEGEL, a power generation company, was sold for US$424.4
million in cash and US$100 million of Peruvian debt. In February 1996, the
Siderperu steel plant was sold for US$167 million in cash and US$26 million of
Peruvian debt. In May 1996, 60% of the La Pampilla oil refinery was sold for
US$180 million. Concession rights for two oil fields operated by Petroperu have
been sold for a total US$344 million. Other privatizations during 1996 included
several fish meal plants for US$38 million, mining concessions for US$29 million
(Centromin's project Antamina bought by Inmet Mining Co. & Rio Algom Ltd., has
an investment commitment of US$2.5 billion) and electricity generators and
distributors for US$543 million (includes Empresa de Generacion Electrica Nor
Peru sold for US$228 million plus an investment commitment of US$42 million).
Over 50 smaller privatizations have taken place, including the sale of an iron
mine, an airline, fish meal plants, a hotel chain, gas stations, four cement
plants, mining concessions and small mines, and several small electricity
generators and distributors.
 
     During 1997, Electro Sur Medio S.A. was sold for US$26 million plus a
similar amount in committed investment; other small companies, including a radio
station and a paper mill, were sold for US$32 million. In April an interest in
Centromin's La Oroya metallurgical complex was sold to Industrias Penoles de
Mexico, for US$185 million. Other privatizations scheduled for 1997 include the
remaining electricity generation and distribution companies in Lima and the rest
of the country (including the 1,012MW Mantaro hydroelectric power plant), as
well as the Talara oil refinery and CENTROMIN, a mining conglomerate.
 
     The Peruvian state has retained minority holdings in some companies that
have recently been privatized, such as EDEGEL, EDELNOR and Banco Continental.
These retained shares will be transferred to private investors through offerings
in the local and international capital markets. A central objective of this
program is to promote broad-based ownership of these companies in Peru.
 
  Balance of Payments
 
     The Peruvian trade balance dropped from a surplus of US$399 million in 1990
to a deficit of US$2.0 billion in 1996 as a result of trade liberalization,
economic growth, and the real appreciation of the local currency. Imports
increased from US$2.9 billion in 1990 to US$7.9 billion in 1996. Exports also
grew substantially, from US$3.3 billion in 1990 to US$5.9 billion in 1996. The
current account registered a deficit of US$4.2 billion in 1995 and US$2.6
billion in 1996 (compared with a deficit of US$1.1 million in 1990) due
essentially to the increase in the trade deficit. The capital account, on the
other hand, had a surplus of US$3.2 billion in 1995 and was break-even in 1996
(compared with a deficit of US$588 million in 1990) mainly due to direct foreign
investment, capital repatriation and portfolio investment flows. Foreign
reserves increased by 16.1% from US$5.7 billion in December 1994 to US$6.6
billion in December 1995 and by 13% to US$8.5 billion in December 1996.
 
     Peruvian exports are relatively diversified, although mining products
represented 43.2% of total exports in 1994, 46.8% in 1995 and 45.0% in 1996. In
1996, copper represented 17.8% of total exports, gold 9.8%, zinc 6.8%, lead
4.7%, and oil and petroleum derivatives 6.0%. Other important traditional
products include fishmeal, which represented 14.1% of 1996 exports, and coffee,
which accounted for 3.8% of 1996 exports. The main non-traditional exports are
textiles, agricultural products, iron and steel products, and fresh and canned
seafood. In 1995 and 1996, non-traditional products represented 25.8% and 27.6%
of total exports, respectively. Peru's most important export markets are the
European Community (28.8%), the United States (21.2%) and Japan (10.2%). The
Andean Pact nations as a whole represent approximately 10% of exports.
 
     Imports rose 37.9% in 1995 and 1.7% in 1996, with the private sector
accounting for over 83% of imports. In 1996, 23.4% of imports were consumption
goods (of which half were consumer durables), 41.0% were
 
                                       A-3
<PAGE>   147
 
intermediate goods (three quarters of which were raw materials for industries),
and 30.7% were capital goods. As a result of the increase in investment, capital
goods imports showed high growth rates in 1994 and 1995, but recorded a
contraction of 0.5% in 1996. The largest part of Peruvian imports come from the
United States (30.1%), followed by the European Community (13.0%), the Andean
Pact (12.6%) and Japan (6.8%).
 
  External Debt
 
     An important element of the current administration's economic program was
the effort to re-establish ties with the international financial community. On
September 12, 1991, the IMF approved the Peruvian government's economic
stabilization program. The arrears obligations were effectively rescheduled
based on a Rights Accumulation Program ("RAP") designed by the IMF for Peru. A
similar arrangement was implemented with the World Bank. These programs set
quarterly macroeconomic targets to be met by the government and gave Peru the
right to receive future loans. The Peruvian government met all the goals of the
RAP and in March 1993 paid its arrears obligations with the IMF and World Bank,
effectively rolling over a total of US$1.8 billion in loans and receiving new
loans of US$600 million.
 
     In March 1993, the Peruvian government reached an agreement with the IMF
for a three year Extended Fund Credit Facility (EFF). Upon compliance with
annual and quarterly macroeconomic goals, the Peruvian government would have
access to IMF financing. Although the financing facilities were not actually
needed or used, the Peruvian government complied with every quarterly goal
throughout the three-year duration of the program. In May 1993, the Peruvian
government completed negotiations with the Paris Club member governments,
reducing Peru's annual debt payments for the 1993-1995 period from US$1 billion
to approximately US$400 million. In addition, interest rates were reduced,
development aid debt was rescheduled for 20 years, and all other credits were
rescheduled for 15 years. Peru also received commitments for over US$910 million
in concessionary credit and donations from the donor countries and multilateral
institutions.
 
     In May 1996, a new agreement with the IMF was reached for a three-year EFF,
covering the 1996-98 period. This new agreement provided the basis for
negotiations with the Paris Club and the closing of the Brady Plan debt
restructuring program. In July 1996, Peru negotiated a new agreement with
respect to the remaining debt with the Paris Club. This debt which, as of March
1996, totaled US$9,422 million was rescheduled over 23 years.
 
     The Peruvian government also took steps toward resuming negotiations with
commercial banks in respect of Peruvian public sector loans. In November 1992,
as a first step toward resuming negotiations with commercial banks, Peru issued
a Tolling Declaration by which Peru agreed not to assert any defense based on a
statute of limitations, laches or the passage of time in suits in various
foreign courts brought by commercial banks in respect of Peruvian public sector
loans. In response to the issuance of the Tolling Declaration and in
anticipation of the resolution of bilateral issues involving certain bank
lenders, as well as certain other issues, the Bank Advisory Committee ("BAC")
for Peru expressed its willingness to seek the dismissal without prejudice of
various lawsuits initiated against various public sector borrowers if
substantially all such pending litigation were to be simultaneously dismissed.
Substantially all such litigation was subsequently dismissed.
 
     In November 1996, the Peruvian government and the BAC executed an agreement
on Peru's Brady Plan debt restructuring program, which closed in the first
quarter of 1997. Pursuant to Peru's Brady Plan, US$4.4 billion in principal is
to be exchanged for (i) dollar-denominated discount bonds (45% discount) with a
bullet maturity of 30 years and a floating interest rate of LIBOR (the London
inter-bank offered rate) plus 0.8125% per annum, (ii) dollar-denominated par
bonds with a bullet maturity of 30 years and fixed interest rates increasing
from 3% per annum initially to 5% per annum in the twenty-sixth year, (iii)
dollar-denominated front-loaded interest reduction bonds with a maturity of 20
years, amortizing after eight years following issuance, with fixed interest
rates increasing from 3.25% per annum initially to 5% per annum in the tenth
year and a floating interest rate of LIBOR plus 0.8125% per annum in the
eleventh through twentieth years or (iv) cash pursuant to a Dutch auction
buyback in which Peru has agreed to repurchase at least US$1.3 billion of
principal and all associated interest. All past due interest associated with
such US$4.4 billion in principal is to be exchanged for (i) dollar-denominated
past due interest bonds with a maturity of 20 years, which begin amortizing five
years after issuance and bear interest at fixed rates increasing from 4% per
annum initially to 5% per annum in the tenth year and bear interest at a
floating rate per annum in the eleventh through twentieth years and (ii) a pro
rata portion of a US$225
 
                                       A-4
<PAGE>   148
 
million cash payment to be made by Peru. In addition to the collateralization of
the principal amount of both the par and discount bonds with US Treasury bonds,
interest payments for both the par and discount bonds are to be collateralized
in an amount equal to six months of interest on a rolling basis. Interest
payments for the front-loaded interest reduction bonds are to be collateralized
in an amount equal to six months of interest for the first ten years on a
rolling basis.
 
     Peru's total foreign debt as of December 1996 was US$33.4 billion,
equivalent to 53.3% of 1996 GDP. These figures include past due interest
generated by the lack of servicing of Peru's commercial bank debt. The majority
of the debt is owed by the public sector and most of this is owed to Paris Club
governments and multilateral financial organizations. Most of the existing debt
was originally contracted in the 1970s and early 1980s and ceased to be
adequately serviced during the 1980s, before resumption of servicing of most of
it during the Fujimori administration.
 
     The following table is a summary of Peru's foreign debt structure as of
December 31, 1996 (in millions).
 
<TABLE>
<CAPTION>
                                           TOTAL         PUBLIC        PRIVATE
          YEAR              TOTAL        LONG-TERM      LONG-TERM     LONG-TERM     SHORT-TERM
    -----------------    -----------    -----------    -----------    ----------    ----------
    <S>                  <C>            <C>            <C>            <C>           <C>
    1996.............    US$ 33,428     US$ 27,815     US$ 25,340     US$ 1,471     US$ 5,613
</TABLE>
 
- ---------------
Source: Central Bank. "Public Long-term" includes Central Bank.
 
  Gross Domestic Product
 
     After in effect remaining stagnant for approximately 15 years, Peru's GDP
began growing strongly in 1993. The following table sets forth Peru's GDP and
its rate of growth for 1992 through 1996.
 
<TABLE>
<CAPTION>
                                          1992       1993       1994        1995        1996
                                         ------     ------     -------     -------     -------
    <S>                                  <C>        <C>        <C>         <C>         <C>
    PRODUCTION
    Nominal GDP (S/million)............  52,170     80,010     109,887     132,362     153,512
    Real GDP growth(%).................    (1.4)       6.4        13.1         6.9         2.5
</TABLE>
 
- ---------------
Source: INEI
 
     Private sector investment has been the fastest growing component of GDP in
the last years, as both local and foreign business sought to take advantage of
the opportunities created by the Fujimori administration's economic policy and
the increasing stability of the economy. The following table provides the
composition of Peruvian aggregate demand and GDP between 1992 and 1996.
 
<TABLE>
<CAPTION>
                                                 1992      1993      1994      1995      1996
                                                 -----     -----     -----     -----     -----
    <S>                                          <C>       <C>       <C>       <C>       <C>
    Aggregate Demand...........................  102.2     102.8     102.9     104.9     104.5
    Private Sector Consumption.................     79      77.7      73.6      72.4        75
    Public Sector Consumption..................    6.6       6.6       7.3       8.3       7.6
    Private Sector Investment..................   13.3      15.1      18.1      20.1      18.5
    Public Sector Investment...................    3.1       3.4       3.9       4.1       3.4
    Gross Domestic Products....................    100     100.0     100.0     100.0       100
    Exports....................................   10.8      10.7      11.4      11.6        12
    Imports....................................     13     (13.5)    (14.3)    (16.5)    (16.4)
</TABLE>
 
- ---------------
Source: Central Bank.
 
     The composition of Peru's GDP by productive sectors has not changed
substantially in the last thirty years, with the exception of an increase in the
participation of electricity, communications, water and construction as the
population with access to basic services and housing has increased. The leading
sectors of the Peruvian economy continue to be manufacturing (including mineral,
petroleum, and fishmeal processing), commerce and other services, and
agriculture. Other formal services (transportation, banking, communications,
etc.) and informal
 
                                       A-5
<PAGE>   149
 
activities (mostly in service sectors) also comprise a substantial part of GDP.
The following table provides a breakdown of GDP by sector for 1996 (estimated).
 
<TABLE>
<CAPTION>
                                                                              1996
                                                                           ----------
                                                                           (% OF GDP)
        <S>                                                                <C>
        Manufacturing....................................................     22.6
        Commerce and other services(1)...................................     14.1
        Agriculture, livestock, and forestry.............................     12.9
        Construction.....................................................      8.8
        Mining...........................................................      9.1
        Electricity and water............................................      1.5
        Fishing..........................................................      1.3
        Other............................................................     29.7
</TABLE>
 
- ---------------
Sources: INEI
 
(1) Includes, among others, restaurants and hotels.
 
  Monetary Policy
 
     Monetary policy is managed by the Central Bank, the Board members of which
are appointed by Congress and the Executive for five year periods, and may not
be removed. The Central Bank's sole mandate is to attain monetary stability.
Exchange rate policy is set by the Central Bank. The local currency is the Sol.
 
     Since 1991, the Central Bank has sought to increase the money supply in
line with the requirements set by economic growth and by the need to remonetize
the economy after the 1988-1990 hyperinflation. Monetary policy has succeeded in
reducing inflation dramatically in the last few years, while allowing for GDP
growth. The main mechanism for increasing the money supply during the last few
years has been Central Bank's purchase of foreign currency in the free foreign
exchange market. There are no limits or controls on capital inflows or outflows,
and the exchange rate has been essentially freely floating since 1991. Central
Bank intervention is usually restricted to limiting a further real appreciation
of the local currency by purchasing dollars.
 
     The Central Bank also sets reserve requirements for banks, with the current
level being 9% for local currency deposits and 45% for foreign currency
deposits. The latter reflects an interest in reducing risks associated with
capital outflows and an effort to reduce further appreciation pressures on the
local currency. Approximately 66% of all loans and deposits in the commercial
banking system are expressed in US dollars, although this ratio is declining
gradually as the remonetization process has advanced. Interest rates for both
local and foreign currency are freely set in the market.
 
     The hyperinflation of the 1980s forced the country to change its currency
twice in the past decade. In February 1985, the Peruvian currency was changed
from "soles" to intis (1 inti = 1,000 soles). In September 1991, the "nuevos
soles" were introduced (1 "nuevo sol" = 1 million intis). In 1996, the
devaluation of the nuevo sol against the US dollar was approximately 12.1% as
compared to an inflation rate for the period of 11%. The
 
                                       A-6
<PAGE>   150
 
following table provides the end of period exchange rates, devaluation rates,
and inflation rates, as measured by the IPC, from 1992 to 1996.
 
<TABLE>
<CAPTION>
                                                       EXCHANGE
                                                       RATE(1)      DEVALUATION %     INFLATION %
                                                       --------     -------------     -----------
    <S>                                                <C>          <C>               <C>
    1992.............................................    1.63            69.8             56.7
    1993.............................................    2.15            31.9             39.5
    1994.............................................    2.18             1.4             15.4
    1995.............................................    2.31             6.0             10.2
    1996.............................................    2.59            12.0             11.8
</TABLE>
 
- ---------------
 
(1) Nuevos Soles per US Dollar.
 
  The Financial System
 
     The Peruvian financial system is comprised of the Central Bank (Banco
Central de Reserva), Banco de la Nacion (the State's financial agent), and more
than twenty commercial banks and finance companies. In addition to the Central
Bank's role, the Banking Superintendency (Superintendencia de Banca y Seguros,
or SBS) oversees and regulates banking and insurance activities in the country.
The SBS has broad powers to assure compliance with the regulations it sets forth
regarding minimum capital, adequate provisioning, and limits on concentration of
credit risk (including related party transactions) by financial intermediaries.
Capital adequacy ratios are determined on the basis of criteria that are
stricter than the Basel accords and credit risks are assessed on a system-wide
basis so that creditors with non-performing loans in one bank are automatically
considered non-performing (for provisioning purposes) for the system. Peruvian
regulation allows for multiple banking, and most large banks offer a broad range
of financial services. The four largest commercial banks account for
approximately 70% of all loans and deposits.
 
     In the last years, the financial system has seen rapid growth as a result
of economic growth, the recomposition of the banking system, the remonetization
process, and large capital flows into the country. Between 1992 and 1996, total
commercial bank loans, expressed in current soles, grew by approximately 48.6%.
The last years have also seen the appearance of new banks and bank acquisitions
by foreign groups (including the privatization of two banks). The quality of the
banking system's loan portfolio has also improved substantially since 1992. The
ratio of past due loans to total loans for commercial banks fell from over 13.0%
in 1992 to 9.3% in 1993, 7.0% in 1994 and 4.8% in 1995. Due to reduced economic
growth, the ratio has increased to 5.4% in 1996.
 
                                       A-7
<PAGE>   151
 
- ------------------------------------------------------
  NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS AND,
IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS
HAVING BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR
A SOLICITATION OF AN OFFER TO BUY ANY OF THE SECURITIES OFFERED HEREBY IN ANY
JURISDICTION TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER IN SUCH
JURISDICTION. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE
HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE AN IMPLICATION THAT THE
INFORMATION HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF OR
THAT THERE HAS BEEN NO CHANGE IN THE AFFAIRS OF SP LIMITED OR SPCC SINCE SUCH
DATE.
 
                               ------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Available Information.................     2
Incorporation of Documents By
  Reference...........................     2
Presentation of Financial
  Information.........................     4
Summary...............................     5
Risk Factors..........................    23
Ratio of Earnings to Fixed Charges....    31
Capitalization........................    32
Selected Summary Consolidated
  Financial Information...............    33
Selected Summary Operating
  Information.........................    34
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations.......................    35
The Exchange Offer....................    46
Business and Properties...............    52
Overview of Copper Market.............    62
Description of Export Receivables.....    63
Regulatory Framework..................    65
Management............................    67
Certain Transactions..................    70
Description of the Notes..............    71
Registration Rights Agreement; Special
  Interest............................   100
Description of Credit Facility........   101
Exchange Rates........................   103
Certain Legal Matters.................   103
Taxation..............................   105
Plan of Distribution..................   108
Legal Matters.........................   109
Experts...............................   109
Glossary of Certain Mining Terms......   110
Index to Consolidated Financial
  Statements..........................   F-1
The Republic of Peru..................   A-1
</TABLE>
 
                               ------------------
 
     UNTIL           , 1997 (90 DAYS AFTER THE DATE HEREOF), ALL DEALERS
EFFECTING TRANSACTIONS IN THE NEW NOTES, WHETHER OR NOT PARTICIPATING IN THIS
DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS IS IN ADDITION TO
THE OBLIGATIONS OF DEALERS TO DELIVER A PROSPECTUS WHEN ACTING AS UNDERWRITERS
AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
- ------------------------------------------------------
 
- ------------------------------------------------------
 
                     SOUTHERN PERU COPPER CORPORATION LOGO
 
                                  $150,000,000
   
                            7.90% SERIES A-1 SECURED
                             EXPORT NOTES DUE 2007
    
 
                Payment of Principal and Interest Guaranteed by
                                 SOUTHERN PERU
                               COPPER CORPORATION
             ------------------------------------------------------
<PAGE>   152
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
     Expenses in connection with the issuance and distribution of the securities
being registered hereby are estimated (except for the Securities and Exchange
Commission ("SEC") registration filing fees, which is the actual amount) as
follows:
 
<TABLE>
        <S>                                                                 <C>
        SEC registration fee..............................................  $ 45,455
        Accounting fees and expenses......................................    25,000
        Legal fees and expenses...........................................    75,000
        Printing and engraving expenses...................................    50,000
        Exchange Agent fees and expenses..................................    10,000
        Miscellaneous.....................................................    19,545
                                                                            --------
             Total........................................................  $225,000
                                                                            ========
</TABLE>
 
ITEM 20.  INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
     Section 145 of the General Corporation Law of Delaware provides that a
corporation may indemnify directors and officers as well as other employees and
individuals against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement in connection with specified actions, suits or
proceedings, whether civil, criminal, administrative or investigative (other
than an action by or in the right of the corporation (a "derivative action")) if
they acted in good faith and in a manner they reasonably believed to be in or
not opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe their conduct
was unlawful. A similar standard is applicable in the case of derivative
actions, except that indemnification only extends to expenses (including
attorneys' fees) incurred in connection with defense or settlement of such
action, and the statute requires court approval before there can be any
indemnification where the person seeking indemnification has been found liable
to the corporation. Section 145 of the DGCL provides that it is not exclusive of
other indemnification that may be granted by a corporation's charter, by-laws,
disinterested director vote, stockholder vote, agreement or otherwise.
 
     Section 11 of Southern Peru Limited's By-Laws provides that Southern Peru
Limited shall indemnify any and all of its directors or officers or former
directors or officers or any person who may have served at its request as a
director or officer of another corporation in which Southern Peru Limited owns
shares of capital stock or of which it is a creditor against expenses actually
and necessarily incurred by them in connection with the defense of any action,
suit or proceeding in which they, or any of them, are made parties, or
proceeding in which they, or any of them, are made parties, or a party, by
reason of being or having been directors or officers or a director or officer of
Southern Peru Limited, or of such other corporation, except in relation to
matters as to which any such director or officer or former director or officer
or person shall be adjudged in such action, suit or proceeding to be liable for
negligence or misconduct in the performance of duty. Such indemnification shall
not be deemed exclusive of any other rights to which those indemnified may be
entitled under Southern Peru Limited's By-Laws, agreement, vote of stockholders,
or otherwise. Southern Peru Limited shall have the right to intervene in and to
defend all such actions, suits or proceedings brought against any such director
or officer or former director or officer or person. Whenever in this paragraph a
director or officer or former director or officer or a person is referred to,
such reference shall be inclusive of his heirs, executors and administrators.
 
     The Certificate of Incorporation of Southern Peru Copper Corporation
provides for indemnification of its directors and officers to the fullest extent
permitted by Delaware law. Southern Peru Copper Corporation's By-Laws provide
mandatory indemnification rights to any officer or director of Southern Peru
Copper Corporation who, by reason of the fact that he or she is an officer or
director of Southern Peru Copper Corporation, is involved in a legal proceeding
of any nature. Such indemnification rights will include reimbursement for
expenses incurred by such officer or director in advance of the final
disposition of such proceeding in accordance with the applicable provisions of
Delaware law. The By-Laws of Southern Peru Copper
 
                                      II-1
<PAGE>   153
 
Corporation provide that Southern Peru Copper Corporation may arrange for
insurance covering such liabilities and expenses arising from actions or
omissions of a director or officer in his capacity as a Corporate Agent as is
obtainable and is reasonable and appropriate in cost and amount.
 
     The Company has various insurance policies, which became effective April
15, 1996, insuring directors and officers against liabilities they may incur,
including liabilities under the Securities Act of 1933, as amended. The policies
provide coverage for claims not reimbursed by the Company up to an aggregate
limit of $75 million without deductible. For claims which are reimbursed by the
Company, the policies provide coverage up to $75 million with a deductible of $1
million. These policies remain in effect.
 
ITEM 21.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     (a) Exhibits:
 
   
<TABLE>
<CAPTION>
   EXHIBIT
    NUMBER                                        DESCRIPTION
- --------------  --------------------------------------------------------------------------------
<S>             <C>
 3.1(a)*        Certificate of Incorporation of Southern Peru Limited, filed December 12, 1952.
 3.1(a)(i)*     Certificate of Amendment of Southern Peru Limited, filed August 18, 1955.
 3.1(a)(ii)*    Certificate of Amendment of Southern Peru Limited, filed February 2, 1966.
 3.1(a)(iii)*   Certificate of Amendment of Southern Peru Limited, filed June 12, 1972.
 3.1(a)(iv)*    Certificate of Amendment of Southern Peru Limited, filed February 25, 1976.
 3.1(a)(v)*     Certificate of Designation of Southern Peru Limited, filed March 15, 1976.
 3.1(a)(vi)*    Certificate of Amendment of Southern Peru Limited, filed August 4, 1981.
 3.1(a)(vii)*   Certificate of Amendment of Southern Peru Limited, filed November 4, 1994.
 3.1(a)(viii)*  Certificate of Amendment of Southern Peru Limited, filed December 29, 1995.
 3.1(a)(ix)*    Certificate of Amendment of Southern Peru Limited, filed April 19, 1996.
 3.1(b)(i)      Restated Certificate of Incorporation of Southern Peru Copper Corporation, filed
                December 29, 1995. (Filed as Exhibit 3.1 to the Company's 1995 Annual Report on
                Form 10-K and incorporated herein by reference)
 3.1(b)(ii)     Certificate of Decrease of Southern Peru Copper Corporation, filed February 29,
                1996.
                (Filed as Exhibit 3.2 to the Company's 1995 Annual Report on Form 10-K and
                incorporated herein by reference)
 3.1(b)(iii)    Certificate of Increase of Southern Peru Copper Corporation, filed February 29,
                1996. (Filed as Exhibit 3.3 to the Company's 1995 Annual Report on Form 10-K and
                incorporated herein by reference)
 3.1(b)(iv)     Certificate of Increase of Southern Peru Copper Corporation, filed March 24,
                1997. (Filed as Exhibit 3.5 to the Company's Quarterly Report on Form 10-Q for
                the quarter ended March 31, 1997 and incorporated herein by reference.)
 3.1(b)(v)      Certificate of Decrease of Southern Peru Copper Corporation, filed March 24,
                1997. (Filed as Exhibit 3.6 to the Company's Quarterly Report on Form 10-Q for
                the quarter ended March 31, 1997 and incorporated herein by reference.)
 3.2(a)*        By-Laws of Southern Peru Limited.
 3.2(b)         By-Laws of Southern Peru Copper Corporation, as last amended on February 9,
                1996. (Filed as Exhibit 3.4 to the Company's 1995 Annual Report on Form 10-K and
                incorporated herein by reference)
 4.1(a)*        Indenture, dated as of May 30, 1997, among Southern Peru Limited, Southern Peru
                Copper Corporation, as guarantor, and Citibank, N.A., as Trustee.
 4.1(b)*        Supplemental Indenture, dated as of May 30, 1997, among Southern Peru Limited,
                Southern Peru Copper Corporation, as guarantor, and Citibank, N.A., as Trustee.
 4.1(c)*        Form of Amended and Restated Collateral Trust Agreement, dated as of July 15,
                1997, between Southern Peru Limited and Deutsche Bank AG, New York Branch, as
                collateral trustee.
</TABLE>
    
 
                                      II-2
<PAGE>   154
 
   
<TABLE>
<CAPTION>
   EXHIBIT
    NUMBER                                        DESCRIPTION
- --------------  --------------------------------------------------------------------------------
<S>             <C>
 4.1(d)*        Form of New Note.
 5*             Opinion and Consent of Davis Polk & Wardwell regarding the validity of the New
                Notes being registered.
 8.1*           Opinion of Davis Polk & Wardwell regarding certain tax matters.
 8.2            Opinion of Estudio Aurelio Garcia Sayan regarding certain tax matters.
10.1            Form of Agreement Among Certain Stockholders of the Company. (Filed as Exhibit
                10.1 to the Company's Registration Statement on Form S-4, as amended by
                Amendments No. 1 and 2 thereto, File No. 33-97790 (the "SPCC Form S-4"), and
                incorporated herein by reference)
10.2            Tax Stability Agreement, dated August 8, 1994, between the Government of Peru
                and the Company regarding SX/EW facility (and English translation). (Filed as
                Exhibit 10.3 to the SPCC Form S-4 and incorporated herein by reference)
10.3            Incentive Compensation Plan of the Company. (Filed as Exhibit 10.11 to the SPCC
                Form S-4 and incorporated herein by reference)
10.4            Supplemental Retirement Plan of the Company. (Filed as Exhibit 10.12 to the SPCC
                Form S-4 and incorporated herein by reference)
10.5            Stock Incentive Plan of the Company. (Filed as an Exhibit to Southern Peru
                Copper Corporation's Registration Statement on Form S-8 dated March 25, 1996
                (Registration No. 33-32736) and incorporated herein by reference)
10.6            Form of Directors Stock Award Plan of Southern Peru Copper Corporation. (Filed
                as Exhibit 10.16 to the SPCC Form S-4 and incorporated herein by reference)
10.7            Form of Deferred Fee Plan for Directors. (Filed as Exhibit 10.8 to Southern Peru
                Copper Corporation's 1995 Annual Report on Form 10-K and incorporated herein by
                reference)
10.8            Form of Agreement Accepting Membership in the Plan, containing text of
                Retirement Plan and Trust for Selected Employees. (Filed as Exhibit 10.17 to the
                SPCC Form S-4 and incorporated herein by reference)
10.9*           Credit Agreement dated as of March 31, 1997 among Southern Peru Limited, as
                Borrower, Southern Peru Copper Corporation, as Guarantor, the several banks and
                other financial institutions from time to time parties to the Credit Agreement,
                Morgan Guaranty Trust Company of New York, as Administrative Agent, The Chase
                Manhattan Bank, as Documentation Agent, Citicorp Securities, Inc., as
                Syndication Agent, and Deutsche Bank AG, New York Branch, as Security and
                Collateral Agent.
10.10*          First Amendment to the Credit Agreement dated July 14, 1997.
12*             Statement re: Computation of Ratios.
15              Letter re: Unaudited Interim Financial Information.
21*             Subsidiaries of Southern Peru Copper Corporation.
23.1            Consent of Independent Accountants.
23.2*           Consents of Davis Polk & Wardwell (see exhibits 5 and 8.1).
23.3            Consent of Estudio Aurelio Garcia Sayan (see exhibit 8.2).
24*             Powers of Attorney (included on the signature pages to the Registration
                Statement.)
25*             Statement of eligibility of Citibank, N.A. on Form T-1.
99.1*           Form of Letter of Transmittal.
99.2*           Form of Notice of Guaranteed Delivery.
99.3*           Instruction to Registered Holder and/or Book-entry transfer of Participant.
99.4*           Form of Letter to Client.
99.5*           Form of Letter to Registered Holders and Depository Trust Company Participants
</TABLE>
    
 
- ---------------
 
   
   * Previously filed as an Exhibit to this Registration Statement.
    
 
                                      II-3
<PAGE>   155
 
ITEM 22.  UNDERTAKINGS
     The undersigned registrants hereby undertake:
 
     (1) (i) To file, during any period in which offers or sales are being made,
a post-effective amendment to this registration statement; (a) to include any
prospectus required by Section (10)(a)(3) of the Securities Act of 1933; (b) to
reflect in the prospectus any facts or events arising after the effective date
of the registration statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the registration statement. Notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high and of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume
and price represent no more than 20 percent change in the maximum aggregate
offering price set forth in the "Calculation of Registration Fee" table in the
effective registration statement; (c) to include any material information with
respect to the plan of distribution not previously disclosed in the registration
statement or any material change to such information in the registration
statement;
 
          (ii) That, for the purpose of determining any liability under the
     Securities Act of 1933, each such post-effective amendment shall be deemed
     to be a new registration statement relating to the securities offered
     therein, and the offering of such securities at the time shall be deemed to
     be the initial bona fide offering thereof;
 
          (iii) To remove from registration by means of a post-effective
     amendment any of the securities being registered which remain unsold at the
     termination of the offering.
 
     (2) Insofar as indemnification for liabilities arising under the Securities
Act of 1933, as amended, may be permitted to directors, officers and controlling
persons of the registrants pursuant to the foregoing provisions, or otherwise,
the registrants have been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as expressed
in the Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrants of expenses incurred or paid by a director, officer or controlling
person of the registrants in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrants will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.
 
     (3) The undersigned registrants hereby undertake to supply by means of a
post-effective amendment all information concerning a transaction, and the
company being acquired involved therein, that was not the subject of and
included in the registration statement when it became effective.
 
     (4) The undersigned registrants hereby undertake that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrants' annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the registration statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
 
     (5) The undersigned registrants hereby undertake that: (a) for purposes of
determining any liability under the Securities Act of 1933, the information
omitted from the form of prospectus filed as part of this registration statement
in reliance upon Rule 430A and contained in a form of prospectus filed by the
registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act
shall be deemed to be part of this Registration Statement as of the time it was
declared effective; (b) for the purpose of determining any liability under the
Securities Act of 1933, each post-effective registration statement relating to
the securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof.
 
                                      II-4
<PAGE>   156
 
   
                                   SIGNATURES
    
 
   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-4 and has duly caused this Amendment No. 1 to
the registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of New York, State of New York, on the
6th day of October, 1997.
    
 
                                          SOUTHERN PERU COPPER CORPORATION
 
   
                                          By: /s/ KEVIN R. MORANO
    
                                            ------------------------------------
   
                                          Name: Kevin R. Morano
    
   
                                          Title:   Vice President
    
 
   
     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed below by the following persons in the
capacities and on the date indicated.
    
 
   
<TABLE>
<CAPTION>
                   SIGNATURE                                         TITLE
- -----------------------------------------------   -------------------------------------------
<C>                                               <S>
            *RICHARD DE J. OSBORNE                Director, Chairman of the Board
- -----------------------------------------------
             Richard de J. Osborne
 
              *CHARLES G. PREBLE                  Director, President and Chief Executive
- -----------------------------------------------   Officer (principal executive officer)
               Charles G. Preble
              *RONALD J. O'KEEFE                  Executive Vice President and Chief
- -----------------------------------------------   Financial Officer (principal financial
               Ronald J. O'Keefe                  officer)
 
              *BRENDAN M. O'GRADY                 Comptroller (principal accounting officer)
- -----------------------------------------------
              Brendan M. O'Grady
 
            *AUGUSTUS B. KINSOLVING               Director
- -----------------------------------------------
            Augustus B. Kinsolving
 
              /s/ KEVIN R. MORANO                 Director
- -----------------------------------------------
                Kevin R. Morano
 
            *AMB. EVERETT E. BRIGGS               Director
- -----------------------------------------------
            Amb. Everett E. Briggs
 
                 *JAIME CLARO                     Director
- -----------------------------------------------
                  Jaime Claro
 
            *FRANCIS R. MCALLISTER                Director
- -----------------------------------------------
             Francis R. McAllister
 
             *JOHN F. MCGILLICUDDY                Director
- -----------------------------------------------
             John F. McGillicuddy
</TABLE>
    
 
                                      II-5
<PAGE>   157
 
   
<TABLE>
<CAPTION>
                   SIGNATURE                                         TITLE
- -----------------------------------------------   -------------------------------------------
 
<C>                                               <S>
 
                *ROBERT J. MUTH                   Director
- -----------------------------------------------
                Robert J. Muth
 
              *ROBERT M. NOVOTNY                  Director
- -----------------------------------------------
               Robert M. Novotny
 
              *ROBERT A. PRITZKER                 Director
- -----------------------------------------------
              Robert A. Pritzker
 
              *MICHAEL O. VARNER                  Director
- -----------------------------------------------
               Michael O. Varner
 
              *J. STEVEN WHISLER                  Director
- -----------------------------------------------
               J. Steven Whisler
 
              *DAVID B. WOODBURY                  Director
- -----------------------------------------------
               David B. Woodbury
 
              *DOUGLAS C. YEARLEY                 Director
- -----------------------------------------------
              Douglas C. Yearley
</TABLE>
    
 
   
Dated: October 6, 1997
    
 
   
*By:        /s/ KEVIN T. MORANO
    
   
     ---------------------------------
    
   
              Kevin R. Morano
    
   
             Attorney-in-Fact
    
 
                                      II-6
<PAGE>   158
 
   
                                   SIGNATURES
    
 
   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-4 and has duly caused this Amendment No. 1 to
the registration statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in the City of New York, State of New York, on the
6th day of October, 1997.
    
 
                                          SOUTHERN PERU LIMITED
 
   
                                          By: /s/ KEVIN R. MORANO
    
                                            ------------------------------------
   
                                            Name: Kevin R. Morano
    
   
                                            Title: Vice President
    
 
   
     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the date indicated.
    
 
   
<TABLE>
<CAPTION>
                   SIGNATURE                                         TITLE
- -----------------------------------------------   -------------------------------------------
 
<C>                                               <S>
 
              *CHARLES G. PREBLE                  Director, President and Chief Executive
- -----------------------------------------------   Officer (principal executive officer)
               Charles G. Preble
              *RONALD J. O'KEEFE                  Director, Executive Vice President and
- -----------------------------------------------   Chief Financial Officer (principal
               Ronald J. O'Keefe                  financial officer)
 
              *BRENDAN M. O'GRADY                 Comptroller (principal accounting officer)
- -----------------------------------------------
              Brendan M. O'Grady
 
            *AUGUSTUS B. KINSOLVING               Director
- -----------------------------------------------
            Augustus B. Kinsolving
 
              /s/ KEVIN R. MORANO                 Director
- -----------------------------------------------
                Kevin R. Morano
 
                *HANS A. FLURY                    Director
- -----------------------------------------------
                 Hans A. Flury
</TABLE>
    
 
   
Dated: October 6, 1997
    
 
   
*By:        /s/ KEVIN R. MORANO
    
   
     ---------------------------------
    
   
             Attorney-in-Fact
    
 
                                      II-7
<PAGE>   159
 
                                     INDEX
 
<TABLE>
<CAPTION>
                                                                                       SEQUENTIALLY
   EXHIBIT                                                                               NUMBERED
    NUMBER                                   DESCRIPTION                                   PAGE
- --------------  ---------------------------------------------------------------------  ------------
<S>             <C>                                                                    <C>
 3.1(a)         Certificate of Incorporation of Southern Peru Limited, filed December
                12, 1952.
 3.1(a)(i)      Certificate of Amendment of Southern Peru Limited, filed August 18,
                1955.
 3.1(a)(ii)     Certificate of Amendment of Southern Peru Limited, filed February 2,
                1966.
 3.1(a)(iii)    Certificate of Amendment of Southern Peru Limited, filed June 12,
                1972.
 3.1(a)(iv)     Certificate of Amendment of Southern Peru Limited, filed February 25,
                1976.
 3.1(a)(v)      Certificate of Designation of Southern Peru Limited, filed March 15,
                1976.
 3.1(a)(vi)     Certificate of Amendment of Southern Peru Limited, filed August 4,
                1981.
 3.1(a)(vii)    Certificate of Amendment of Southern Peru Limited, filed November 4,
                1994.
 3.1(a)(viii)   Certificate of Amendment of Southern Peru Limited, filed December 29,
                1995.
 3.1(a)(ix)     Certificate of Amendment of Southern Peru Limited, filed April 19,
                1996.
 3.1(b)(i)      Restated Certificate of Incorporation of Southern Peru Copper
                Corporation, filed December 29, 1995. (Filed as Exhibit 3.1 to the
                Company's 1995 Annual Report on Form 10-K and incorporated herein by
                reference)
 3.1(b)(ii)     Certificate of Decrease of Southern Peru Copper Corporation, filed
                February 29, 1996. (Filed as Exhibit 3.2 to the Company's 1995 Annual
                Report on Form 10-K and incorporated herein by reference)
 3.1(b)(iii)    Certificate of Increase of Southern Peru Copper Corporation, filed
                February 29, 1996. (Filed as Exhibit 3.3 to the Company's 1995 Annual
                Report on Form 10-K and incorporated herein by reference)
 3.1(b)(iv)     Certificate of Increase of Southern Peru Copper Corporation, filed
                March 24, 1997. (Filed as Exhibit 3.5 to the Company's Quarterly
                Report on Form 10-Q for the quarter ended March 31, 1997 and
                incorporated herein by reference.)
 3.1(b)(v)      Certificate of Decrease of Southern Peru Copper Corporation, filed
                March 24, 1997. (Filed as Exhibit 3.6 to the Company's Quarterly
                Report on Form 10-Q for the quarter ended March 31, 1997 and
                incorporated herein by reference.)
 3.2(a)         By-Laws of Southern Peru Limited.
 3.2(b)         By-Laws of Southern Peru Copper Corporation, as last amended on
                February 9, 1996. (Filed as Exhibit 3.4 to the Company's 1995 Annual
                Report on Form 10-K and incorporated herein by reference)
 4.1(a)         Indenture, dated as of May 30, 1997, among Southern Peru Limited,
                Southern Peru Copper Corporation, as guarantor, and Citibank, N.A.,
                as Trustee.
 4.1(b)         Supplemental Indenture, dated as of May 30, 1997, among Southern Peru
                Limited, Southern Peru Copper Corporation, as guarantor, and
                Citibank, N.A., as Trustee.
 4.1(c)         Form of Amended and Restated Collateral Trust Agreement, dated as of
                July 15, 1997, between Southern Peru Limited and Deutsche Bank AG,
                New York Branch, as collateral trustee.
 4.1(d)         Form of New Note.
 5              Opinion and Consent of Davis Polk & Wardwell regarding the validity
                of the New Notes being registered.
 8.1            Opinion of Davis Polk & Wardwell regarding certain tax matters.
 8.2            Opinion of Estudio Aurelio Garcia Sayan regarding certain tax
                matters.
</TABLE>
<PAGE>   160
 
<TABLE>
<CAPTION>
                                                                                       SEQUENTIALLY
   EXHIBIT                                                                               NUMBERED
    NUMBER                                   DESCRIPTION                                   PAGE
- --------------  ---------------------------------------------------------------------  ------------
<S>             <C>                                                                    <C>
10.1            Form of Agreement Among Certain Stockholders of the Company. (Filed
                as Exhibit 10.1 to the Company's Registration Statement on Form S-4,
                as amended by Amendments No. 1 and 2 thereto, File No. 33-97790 (the
                "SPCC Form S-4"), and incorporated herein by reference)
10.2            Tax Stability Agreement, dated August 8, 1994, between the Government
                of Peru and the Company regarding SX/EW facility (and English
                translation). (Filed as Exhibit 10.3 to the SPCC Form S-4 and
                incorporated herein by reference)
10.3            Incentive Compensation Plan of the Company. (Filed as Exhibit 10.11
                to the SPCC Form S-4 and incorporated herein by reference)
10.4            Supplemental Retirement Plan of the Company. (Filed as Exhibit 10.12
                to the Company's Form S-4 and incorporated herein by reference)
10.5            Stock Incentive Plan of the Company. (Filed as an Exhibit to Southern
                Peru Copper Corporation's Registration Statement on Form S-8 dated
                March 25, 1996 (Registration No. 33-32736) and incorporated herein by
                reference)
10.6            Form of Directors Stock Award Plan of Southern Peru Copper
                Corporation. (Filed as Exhibit 10.16 to the Company's Form S-4 and
                incorporated herein by reference)
10.7            Form of Deferred Fee Plan for Directors. (Filed as Exhibit 10.8 to
                Southern Peru Copper Corporation's 1995 Annual Report on Form 10-K
                and incorporated herein by reference)
10.8            Form of Agreement Accepting Membership in the Plan, containing text
                of Retirement Plan and Trust for Selected Employees. (Filed as
                Exhibit 10.17 to the SPCC Form S-4 and incorporated herein by
                reference)
10.9            Credit Agreement dated March 31, 1997 among Southern Peru Limited, as
                Borrower, Southern Peru Copper Corporation, as Guarantor, the several
                banks and other financial institutions from time to time parties to
                the Credit Agreement, Morgan Guaranty Trust Company of New York, as
                Administrative Agent, The Chase Manhattan Bank, as Documentation
                Agent, Citicorp Securities, Inc., as Syndication Agent, and Deutsche
                Bank AG, New York Branch, as Security and Collateral Agent.
10.10           First Amendment to the Credit Agreement dated July 14, 1997.
12              Statement re Computation of Ratios.
15              Letter re Unaudited Interim Financial Information.
21              Subsidiaries of Southern Peru Copper Corporation.
23.1            Consent of Independent Accountants.
23.2            Consents of Davis Polk & Wardwell (see exhibits 5 and 8.1).
24              Powers of Attorney (included on the signature pages to the
                Registration Statement.)
25              Statement of eligibility of Citibank, N.A. on Form T-1.
99.1            Form of Letter of Transmittal.
99.2            Form of Notice of Guaranteed Delivery.
99.3            Instruction to Registered Holder and/or Book-entry transfer of
                Participant.
99.4            Form of Letter to Client.
99.5            Form of Letter to Registered Holders and Depository Trust Company
                Participants
</TABLE>

<PAGE>   1
                                                                Exhibit 8.2



                             [LETTERHEAD OF ESTUDIO
                              AURELIO GARCIA SAYAN
                                   ABOGADOS]



                                                           October 6, 1997

Southern Peru Limited
180 Maiden Lane
New York, NY 10038

Ladies and Gentlemen:

        Reference is made to the prospectus (the "Prospectus") contained in
the registration statement on Form S-4 being furnished by Southern Peru Limited
and Southern Peru Copper Corporation to the Securities and Exchange Commission
furnished in connection with the exchange of Old Notes for New Notes (the
"Exchange"), all as described in the Prospectus.

        The summary contained in the Prospectus under the caption "Peruvian
Taxation" accurately describes the Peruvian tax consequences referred to
therein and constitutes the opinion of this firm, subject to the qualifications
stated therein.

        We consent to the reference to the name of our law firm under the
section captioned "Peruvian Taxation" in the Prospectus which is part of the
Registration Statement and any amendments to such Registration Statement and
Prospectus. In giving such consent we do not thereby admit that we are in the
category of persons whose consent is required under Section 7 of the Securities
Act of 1933.

                                             Very truly yours,


                                             /s/ Alfredo Gastaneta


                                             Alfredo Gastaneta

<PAGE>   1
                                                              Exhibit 15



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549


We are aware that our report dated July 21, 1997 on our review of the interim
financial information of Southern Peru Copper Corporation and Subsidiaries as of
June 30, 1997 and for the three-month and six-month periods ended June 30, 1997
and 1996 and included in the Company's Form 10-Q for the quarter ended June 30,
1997 is incorporated by reference in the Company's registration statement on
amendment No. 1 to Form S-4 (File No. 333-34305). Pursuant to Rule 436(c) under
the Securities Act of 1933, this report should not be considered a part of the
Registration Statement prepared or certified by us within the meaning of
Sections 7 and 11 of that Act.


                                                
                                     /s/ Coopers & Lybrand L.L.P.



New York, New York
October 3, 1997

 

<PAGE>   1



                                                                    Exhibit 23.1



                         CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the inclusion in this registration statement on amendment No. 1
Form S-4 (File No. 333-34305) of our report dated January 28, 1997, except for
Note 22, which was as of February 21, 1997 on our audits of the financial
statements of Southern Peru Copper Corporation. We also consent to the
references to our firm as experts under the caption "Independent Public
Accountants."


                                       /s/ Coopers & Lybrand L.L.P.


New York, New York
October 3, 1997



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