SUNSHINE MINING & REFINING CO
S-3, 1999-03-16
MINING & QUARRYING OF NONMETALLIC MINERALS (NO FUELS)
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<PAGE>   1
     As filed with the Securities and Exchange Commission on March 16, 1999
                                                           Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION

                      ------------------------------------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                      ------------------------------------


                      SUNSHINE MINING AND REFINING COMPANY
             (Exact name of registrant as specified in its charter)

         DELAWARE                                                75-2618333
(State or other jurisdiction of                               (I.R.S. Employer
incorporation or organization)                               Identification No.)

                          77 W. MAIN STREET, SUITE 600
                               BOISE, IDAHO 83702
                                 (208) 345-0660
               (Address, including zip code, and telephone number,
                 including area code, of registrant's principal
                               executive offices)
                      ------------------------------------

                     JOHN S. SIMKO, CHIEF EXECUTIVE OFFICER
                          877 W. MAIN STREET, SUITE 600
                               BOISE, IDAHO 83702
                                 (208) 345-0660
                (Name, address, including zip code, and telephone
               number, including area code, of agent for service)
                      ------------------------------------

                                    COPY TO:
                                JANICE V. SHARRY
                              HAYNES AND BOONE, LLP
                             3100 NATIONSBANK PLAZA
                                 901 MAIN STREET
                            DALLAS, TEXAS 75202-3789
                                 (214) 651-5000
                      ------------------------------------


        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
   From time to time after the effective date of this Registration Statement.

     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]
     
     If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>

====================================================================================================================================
                                                                                                    PROPOSED       

                                                                         PROPOSED MAXIMUM           MAXIMUM             AMOUNT OF
           TITLE OF EACH CLASS                      AMOUNT TO BE        OFFERING PRICE PER     AGGREGATE OFFERING     REGISTRATION
     OF SECURITIES TO BE REGISTERED                  REGISTERED                SHARE                 PRICE                  FEE
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                              <C>                        <C>                  <C>                     <C>    
Common Stock, par value $0.01 per share.......   19,000,000 shares (1)      $0.53125 (2)         $ 10,093,750 (2)        $ 2,807
====================================================================================================================================
</TABLE>

(1)      Represents the maximum number of shares of Common Stock that may be
         issued upon conversion of Sunshine Mining and Refining Company's 5%
         Convertible Notes due January 28, 2001. The number of shares of Common
         Stock to be registered shall be deemed to include such greater number
         of shares of Common Stock as are issuable as a result of any adjustment
         to the conversion price of the 5% Convertible Notes due January 28,
         2001.

(2)      Estimated solely for purposes of calculating the registration fee
         pursuant to Rule 457(c) under the Securities Act of 1933, as amended,
         based on the average of the high and low reported sales price of the
         Common Stock on the New York Stock Exchange on March 10, 1999.

     THE REGISTRANT HEREBY AMENDS 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

                      SUBJECT TO COMPLETION, MARCH 12, 1999

PROSPECTUS
                         ------------------------------

                      SUNSHINE MINING AND REFINING COMPANY
         877 W. Main Street, Suite 600, Boise, Idaho 83702, 208.345.0660

                     UP TO 19,000,000 SHARES OF COMMON STOCK
                         ------------------------------

     We issued $6 million in initial principal amount of 5% Convertible Notes.
Interest on the 5% Convertible Notes will accrue at the rate of 5%, compounded
quarterly, and will be paid by adding the amount of the interest to the
principal amount of the Convertible Notes.

     The Convertible Notes are convertible into our Common Stock at a discount
to the trading price of the Common Stock. The discount will be calculated at the
time of conversion. The maximum number of shares of Common Stock that may be
issued upon conversion of the Convertible Notes is 19,000,000, subject to
adjustment upon the occurrence of certain events.

     This Prospectus relates to the resale by selling stockholders of the Common
Stock issuable upon conversion of the 5% Convertible Notes. The selling
stockholders may offer the shares of Common Stock through public or private
transactions, at prevailing market prices, or at privately negotiated prices. If
required, we will prepare a revised Prospectus or Prospectus Supplement that
will contain information on the amount of Common Stock being offered and the
terms of the offering, including the identity of any underwriters, dealers or
agents, compensation from the selling securityholders to underwriters, dealers
or agents and any discounts, commissions or concessions to dealers.

     We will not receive any of the proceeds from the sale of the Common Stock
offered by this Prospectus. All costs, expenses and fees in connection with the
registration of the Common Stock will be paid by us, except that the selling
stockholders will pay their own underwriting discounts and selling commissions.

                       New York Stock Exchange Symbol: SSC
                    Recent Price: $0.5625 at March 10, 1999.

                  --------------------------------------------


        PROSPECTIVE PURCHASERS SHOULD CONSIDER CAREFULLY THE RISK FACTORS
                     BEGINNING ON PAGE 3 OF THIS PROSPECTUS.

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED THESE SECURITIES, OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

     THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. THE
SELLING SECURITY HOLDERS MAY NOT SELL THESE SECURITIES UNTIL THE REGISTRATION
STATEMENT FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS
PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN
OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT
PERMITTED.

                  --------------------------------------------

                  Prospectus dated                      , 1999
                                   ---------------------

<PAGE>   3



================================================================================
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                                             PAGE
                                                                                             ----  
<S>                                                                                          <C>
RISK FACTORS.................................................................................  3
WHERE YOU CAN FIND MORE INFORMATION..........................................................  6
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE............................................  7
THE COMPANY..................................................................................  7
RECENT DEVELOPMENTS..........................................................................  8
USE OF PROCEEDS..............................................................................  9
DESCRIPTION OF CAPITAL STOCK.................................................................  9
PLAN OF DISTRIBUTION......................................................................... 12
SELLING STOCKHOLDERS......................................................................... 14
SHARES ELIGIBLE FOR FUTURE SALE.............................................................. 16
LEGAL MATTERS................................................................................ 17
EXPERTS  .................................................................................... 17
</TABLE>

================================================================================

                                      -2-

<PAGE>   4




                                  RISK FACTORS

     IN ADDITION TO THE OTHER INFORMATION IN THIS PROSPECTUS OR INCORPORATED BY
REFERENCE INTO THIS PROSPECTUS, YOU SHOULD CAREFULLY CONSIDER THE RISK FACTORS
BELOW PRIOR TO YOUR PURCHASE OF COMMON STOCK. THIS PROSPECTUS AND THE OTHER
INFORMATION INCORPORATED BY REFERENCE INTO THIS PROSPECTUS CONTAINS
"FORWARD-LOOKING STATEMENTS," WHICH CAN BE IDENTIFIED BY TERMINOLOGY SUCH AS
"MAY," "WILL," "EXPECT," ANTICIPATE," ESTIMATE," OR "CONTINUE." THE RISK FACTORS
SET FORTH BELOW IDENTIFY CERTAIN FACTORS, INCLUDING CERTAIN RISKS AND
UNCERTAINTIES, THAT COULD CAUSE OUR ACTUAL RESULTS TO DIFFER MATERIALLY FROM
THOSE IN THE FORWARD-LOOKING STATEMENTS.

     THE DOCUMENTS WE HAVE INCORPORATED BY REFERENCE INTO THIS PROSPECTUS,
INCLUDING THE FINANCIAL STATEMENTS AND THE NOTES TO FINANCIAL STATEMENTS
CONTAINED IN THOSE DOCUMENTS, CONTAIN MORE DETAILED DISCUSSIONS OF THE MATTERS
DISCUSSED BELOW.

OPERATING LOSSES

     Our earnings are directly related to the price of silver because
approximately 80% of our revenues come from the sale of silver mined from our
Sunshine Mine in Kellogg, Idaho. Silver prices have been depressed since 1985.
As a result, our mining operations are not profitable. We have experienced net
losses for the past ten years. Our recent net losses are as follows:

     o   1994 - $ 4.9 million

     o   1995 - $15.5 million

     o   1996 - $25.9 million

     o   1997 - $19.3 million

     o   1998 - $64.8 million

     Our net losses for 1998 reflect a $50.4 million charge to write down our
investment in the Sunshine Mine. At December 31, 1998, we had a $17.5 million
stockholders' deficit, working capital of $9.7 million and cash and liquid
assets of $6.6 million.

     These financial results are primarily a result of depressed silver prices
resulting in margins that are insufficient to cover our other expenses. If
silver prices do not improve, we expect to fund our losses for the 1999 fiscal
year from our cash and cash equivalents and the silver bullion we hold for
investment. On January 31, 1999, after giving effect to the sale of the 5%
Convertible Notes, our cash, cash equivalents, and silver bullion held for
investment totaled approximately $12.7 million.

     We expect our operating losses and cash flow deficiencies to continue
until:

     o   silver prices recover substantially,

     o   our exploration efforts at the Sunshine Mine result in significant
         additional production, or

     o   our exploration and development of the Pirquitas Mine in Argentina
         results in significant additional production.

                                      -3-
<PAGE>   5

     If one of these events does not occur, we eventually may be required to
further curtail our operations or cease mining at the Sunshine Mine altogether.
In an attempt to ensure our ability to continue operations at least through
December 31, 1999, we have reduced our Argentina operations primarily to the
level required to complete the feasibility study for the Pirquitas Mine and
implemented cost reduction and cash conservation plans and initiatives to reduce
our work-in-process inventory. There can be no assurance that we will be
successful in implementing these actions. If we are unable to successfully
implement these actions or the price of silver declines below our projections,
our ability to continue operating through December 31, 1999 will be materially
and adversely affected and we may have to curtail operations or sell some of our
assets to continue operations. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations," "Business and Properties" and
our financial statements (including the notes to our financial statements) that
appear in our Annual Report and Quarterly Reports.

VOLATILITY OF SILVER PRICES

     Because our earnings are directly related to the price of silver, the value
of the Common Stock historically has moved in the same direction as the price of
silver. Numerous factors beyond our control, alone or in combination, may cause
the price of silver to rise or fall. These factors include, among others:

     o   inflation expectations,

     o   speculative activities,

     o   levels of silver production, and

     o   the demand for silver as a component of manufactured goods.

     The following table contains the high, low and average closing spot prices
per ounce of silver on the Commodity Exchange, Inc. ("COMEX") for the indicated
periods.

<TABLE>
<CAPTION>
                                                             NOMINAL DOLLARS                   
                                            ------------------------------------------------           
               YEAR                            HIGH                LOW             AVERAGE     
- -------------------------------------       -----------          -------         -----------
<S>                                           <C>                 <C>              <C>   
1983...............................           $14.74              $8.38            $11.46
1984...............................            10.17               6.25              8.15
1985...............................             6.89               5.48              6.14
1986...............................             6.32               4.85              5.49
1987...............................            11.25               5.35              6.99
1988...............................             8.06               6.01              6.53
1989...............................             6.20               5.02              5.47
1990...............................             5.35               3.94              4.82
1991...............................             4.55               3.51              4.03
1992...............................             4.32               3.63              3.94
1993...............................             5.44               3.52              4.31
1994...............................             5.78               4.61              5.28
1995...............................             6.10               4.38              5.20
</TABLE>



                                      -4-
<PAGE>   6

<TABLE>
<CAPTION>
                                                             NOMINAL DOLLARS                   
                                            ------------------------------------------------           
               YEAR                            HIGH                LOW             AVERAGE     
- -------------------------------------       -----------          -------         -----------
<S>                                           <C>                 <C>              <C>   

1996...............................             5.84               4.71              5.21
1997...............................             6.34               4.16              4.88
1998...............................             7.26               4.62              5.51
</TABLE>



     On March 10, 1999, the closing price of spot silver as reported on the
COMEX was $5.28 per ounce.

DEPENDENCE ON EXPLORATION SUCCESS

     Substantially all of our revenues are derived from the Sunshine Mine, which
is not profitable at current silver prices. Therefore, our future earnings are
dependent on the success of our exploration projects at the Sunshine Mine,
Pirquitas and other locations. Our exploration program may not prove successful.
See "Business and Properties -- Operations -- Exploration Activities at the
Sunshine Mine" included in the Annual Report.

IMPRECISION OF RESERVE ESTIMATES

     Our ore reserve estimates discussed in the "Company" section below
represent the judgment of our geologic personnel and are not guarantees that the
indicated quantities will be recovered. Reserve estimates are expressions of
judgment based largely on data from diamond drill holes and underground
openings, such as drifts or raises, which expose the mineral on 1, 2, or 3
sides, sampling data and similar examinations.

     Our reserve estimates may change as ore bodies are mined and we obtain
additional data. We have not retained any independent consultants to review and
verify our estimates.

POTENTIAL DELISTING ON THE NEW YORK STOCK EXCHANGE

     The Common Stock is listed for trading on the New York Stock Exchange. On
March 4, 1999, the New York Stock Exchange sent a letter to us indicating that
it has determined that we fall below their continued listing criteria. In
accordance with their procedures, we intend to present to them in April 1999 a
definitive action plan for meeting their listing standards within eighteen
months. Should the New York Stock Exchange not accept our proposal and
thereafter commence a delisting action against us, the letter states that they
will provide us with formal notice and, following suspension in trading, we will
be afforded the right to an appeal. If the Common Stock is delisted from trading
on the New York Stock Exchange, there would be severe negative effects on us and
our stockholders unless we are able to have the Common Stock listed on another 
exchange.

MINING RISKS AND INSURANCE

     Our operations may be affected by risks and hazards generally associated
with the mining industry. These risks and hazards include fires, cave-ins, rock
bursts, flooding, industrial accidents, mechanical or electrical failures,
unusual or unexpected rock formations and environmental pollution or other
hazards resulting from the disposal of waste products occurring from production.
Such risks could result in damage to, or destruction of, mineral properties or
producing facilities, personal injury, environmental damage, delays in mining,
monetary losses and possible legal liability. We maintain insurance at levels
consistent with our historical experience and industry practice. We may not
always be able to pay for this insurance, especially if there is an increase in
the cost of premiums. Insurance for environmental risks is generally too
expensive for us and other companies within our industry.



                                      -5-
<PAGE>   7

GOVERNMENT REGULATION

     Extensive federal, state and local laws and regulations control our mineral
mining and exploration activities. These laws and regulations also govern the
possible effects of these activities on the environment. We have been involved
in lawsuits in which we have been accused of violating environmental laws and
may be subject to similar lawsuits in the future. New legislation and
regulations could be adopted at any time that may result in additional operating
expense, capital expenditures or restrictions and delays in the mining,
production or development of our properties.

RISKS INHERENT IN FOREIGN OPERATIONS

     We presently conduct operations internationally and anticipate that we will
continue to conduct significant international operations in the future. Because
we conduct operations internationally, we are subject to the effects of local
political and economic developments, exchange controls, currency fluctuations,
royalty and tax increases, retroactive tax claims, expropriation, import and
export regulations, other foreign laws or policies governing operations of
foreign-based companies and United States laws and policies affecting foreign
trade, taxation and investment.

     Because we do business with foreign governments, our contracts with those
governments are subject to renegotiation and our ability to enforce our rights
against those governments by bringing a lawsuit may be subject to the doctrine
of sovereign immunity, which prohibits or restricts lawsuits against government
agencies. In addition, we may be sued in a foreign country or be forced to bring
suit in a foreign country to enforce our rights against foreign parties.

DILUTION; EFFECT OF SALES OF COMMON STOCK ON MARKET PRICE

     As of March 10, 1999, we had 259.9 million shares of Common Stock
outstanding (excluding 4.6 million treasury shares). We previously have
registered with the Securities and Exchange Commission a total of approximately
83 million shares of Common Stock for resale by some of our stockholders. In
addition, we have reserved a large number of shares of Common Stock for future
issuance upon the exercise of outstanding stock warrants and options. We caution
you that:

     o   the sale of shares of Common Stock previously registered or to be
         registered for resale could have a material adverse effect on the
         market price of the Common Stock,

     o   the issuance of shares of Common Stock that have been reserved for
         future issuance could also have a material adverse effect on the market
         price of the Common Stock, and

     o   the issuance of shares of Common Stock could significantly dilute our
         current stockholders' ownership interests.

                       WHERE YOU CAN FIND MORE INFORMATION

     We file annual, quarterly and special reports, proxy statements and other
information with the Securities and Exchange Commission. You may read and copy
any document we file at the Security and Exchange Commission's public reference
room at 450 Fifth Street, N.W., Washington, D.C. 20549. Please call the
Securities and Exchange Commission at 1-800-SEC-0330 for further information on
its public reference room. Our Securities and Exchange Commission filings are
also available to the public from our web site at http://www.sunshinemining.com,
or at the Securities and Exchange Commission's web site at http://www.sec.gov or
at the offices of the New York Stock Exchange, 20 Broad Street, New York, New
York 10005.



                                      -6-
<PAGE>   8

                INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

     The Securities and Exchange Commission allows us to "incorporate by
reference" the information we file with them, which means that we can disclose
important information to you by referring you to those documents. You should
consider the information incorporated by reference to be part of this
prospectus, and information that we file later with the Securities and Exchange
Commission will automatically update and replace this information. We
incorporate by reference the documents listed below and any future filings we
make with the Securities and Exchange Commission under Section 13(a), 13(c), 14
or 15(d) of the Securities Exchange Act of 1934 until the selling security
holders sell all the shares of Common Stock. This Prospectus is part of a
Registration Statement we filed with the Securities and Exchange Commission
(Registration No. 333-________).

     o   Annual Report on Form 10-K for the fiscal year ended December 31, 1998,

     o   Report on Form 8-K filed on February 4, 1999, and

     o   Description of our Common Stock contained in our Registration Statement
         on Form 8-A, as amended, Registration Number 1-7966.

     You may request a copy of these filings, at no cost, by writing or
telephoning us at the following address:

                  Corporate Secretary
                  Sunshine Mining and Refining Company
                  877 W. Main Street
                  Suite 600
                  Boise, Idaho  83702
                  208.345.0660

     YOU SHOULD RELY ONLY ON THE INFORMATION INCORPORATED BY REFERENCE OR
PROVIDED IN THIS PROSPECTUS OR THE SUPPLEMENTS TO THE PROSPECTUS. WE HAVE NOT
AUTHORIZED ANYONE TO PROVIDE YOU WITH DIFFERENT INFORMATION. THE SELLING
STOCKHOLDERS ARE NOT MAKING AN OFFER OF THESE SECURITIES IN ANY STATE WHERE THE
OFFER IS NOT PERMITTED. YOU SHOULD NOT ASSUME THAT THE INFORMATION IN THIS
PROSPECTUS OR ANY SUPPLEMENT TO THIS PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER
THAN THE DATE ON THE FRONT OF THE DOCUMENT.

                                   THE COMPANY

     We are one of the world's leading primary silver producers. We own the
Sunshine Mine in the Coeur d'Alene Mining District of northern Idaho and the
Pirquitas Mine in northwest Argentina.

     The Sunshine Mine, in operation for over 100 years, has produced more
silver than any other primary silver producing mine in North America. Currently,
estimated reserves for the Sunshine Mine are proven and probable reserves of
37.4 million ounces of silver. Based on the most recent engineering data,
production in 1999 is expected to continue at approximately 5.5 million ounces,
and projected net cash production costs are projected at approximately $4.50 per
ounce of silver.

     The bankable feasibility study being prepared for the Pirquitas Mine
currently estimates that there are proven and probable reserves of 101.0 million
ounces of silver, 116.4 million pounds of tin and 194.0 million pounds of zinc.
The feasibility study is being prepared to support our efforts to finance
development of the Pirquitas Mine. Current capital cost estimates to develop the
Pirquitas Mine are 




                                      -7-
<PAGE>   9

approximately $120 million, and projected net cash production costs are
estimated at approximately $2.00 per ounce of silver (net of tin and zinc
by-product credits).

     Our company is a Delaware corporation. The mailing address and telephone
number for our principal executive offices are:

                  877 W. Main Street
                  Suite 600
                  Boise, Idaho  83702
                  208.345.0660

                               RECENT DEVELOPMENTS

     On January 28, 1999, we sold $6 million in initial principal amount of 5%
Convertible Notes in a private placement. The 5% Convertible Notes rate senior
to all of our subordinated obligations. Interest on the 5% Convertible Notes
accrues at 5% and will be paid by adding the interest to the 5% Convertible
Notes. Interest on the 5% Convertible Notes accrues and is payable quarterly.

     The principal amount of the 5% Convertible Notes may be converted in whole
or in part at any time into Common Stock. The conversion price will be
determined at the time of conversion. To determine the conversion price:

     o   First, we will find the average of the highest and lowest trading
         prices for the Common Stock on each day for the twenty consecutive
         trading days prior to the conversion date;

     o   Second, we will find the average of the five lowest prices determined
         in the first step;

     o   Third, we will deduct from the price determined in the second step 3%,
         plus an additional 1% for each full thirty day period that the 5%
         Convertible Notes have been outstanding, up to an additional 5%; and

     o   Fourth, $3 million in initial principal amount of the 5% Convertible
         Notes have a maximum conversion price of $0.6875.

     The conversion price of the 5% Convertible Notes is subject to
anti-dilution adjustments. Regardless of the conversion price, we will not have
to issue more than 19 million shares of Common Stock upon conversion of the 5%
Convertible Notes, but such maximum number is subject to adjustment.

     Although the 5% Convertible Notes are due and payable in cash on January
28, 2001, under certain conditions we may have the option to require conversion
of all outstanding 5% Convertible Notes upon their maturity.

     At the option of the holders of the 5% Convertible Notes, we will have to
prepay the 5% Convertible Notes upon the occurrence of certain events; mainly
transactions involving tender offers, going private transactions and changes in
control of our corporation. If we have to prepay the 5% Convertible Notes, the
prepayment price will be equal to 115% of the outstanding principal amount.

     At the time we sold the 5% Convertible Notes, we entered into a
Registration Rights Agreement with the purchasers of the 5% Convertible Notes
that, among other obligations, requires us to register the Common Stock issuable
upon conversion of the 5% Convertible Notes with the Securities and Exchange





                                      -8-
<PAGE>   10

Commission so that the Common Stock may be sold to the public. The Registration
Rights Agreement provides that we must make penalty payments to the holders of
the 5% Convertible Notes if:

     o   the Common Stock issuable upon conversion of the 5% Convertible Notes
         is not registered with the Securities and Exchange Commission by April
         27, 1999,

     o   the registration of the Common Stock is suspended for more than five
         consecutive days or more than twenty days in any calendar year,

     o   the Common Stock is not listed for trading on The New York Stock
         Exchange, the Nasdaq National Market System or the American Stock
         Exchange for a certain period of time, or

     o   we do not keep available for issuance enough shares of Common Stock,
         subject to a maximum amount, to allow conversion of all of the 5%
         Convertible Notes.

     To the extent that penalty payments become due, holders of the 5%
Convertible Notes have the option to add the amount of the penalty payment to
the outstanding principal amount of their 5% Convertible Notes.

     If we do not have available a sufficient number of shares of Common Stock
reserved for issuance to satisfy our obligations to issue Common Stock upon
conversion of the 5% Convertible Notes, then, in addition to the penalty
payments described above, the holders of the 5% Convertible Notes have the right
to require us to redeem the 5% Convertible Notes. The holders of the 5%
Convertible Notes also have the right to require us to redeem the 5% Convertible
Notes if we fail to pay the penalty payments described above in a timely manner.
If we are required to redeem the Common Stock, the redemption price will be the
greater of:

     o   120% of the principal amount of the 5% Convertible Notes being
         redeemed; or

     o   the principal amount of the 5% Convertible Notes being redeemed plus a
         formula that represents the spread between the conversion price of the
         5% Convertible Notes and the market price for the Common Stock that is
         issuable upon conversion of the 5% Convertible Notes being redeemed.

                                 USE OF PROCEEDS

     We will not receive any proceeds from the sale of the Common Stock by the
selling stockholders.

                          DESCRIPTION OF CAPITAL STOCK

     We have summarized certain terms and provisions of our outstanding capital
stock in this section. The summary is not complete. We have also filed our
Certificate of Incorporation, and Amendment to our Certificate of Incorporation
and our Bylaws with the Securities and Exchange Commission. You should read our
Certificate of Incorporation, as amended, and our Bylaws for additional
information before you purchase any of the Common Stock.

     As of March 10, 1999, our authorized capital stock was 620 million shares.
Those shares consist of 600 million shares of Common Stock, par value $0.01 per
share, and 20 million shares of Preferred Stock, par value $1.00 per share.



                                      -9-
<PAGE>   11

COMMON STOCK

     As of March 10, 1999, 259.6 million shares of our Common Stock were
outstanding and 4.6 million shares of Common Stock were held in our treasury. As
of March 10, 1999, there were approximately 30,000 holders of record of our
Common Stock.

     Subject to the senior rights of Preferred Stock which may from time to time
be outstanding, holders of Common Stock are entitled to receive dividends
declared by the Board of Directors out of funds legally available for the
payment of dividends. Upon the dissolution and liquidation of our business,
holders of Common Stock are entitled to a ratable share of our net assets
remaining after payment to the holders of the Preferred Stock of the full
preferential amounts to which they are entitled. All outstanding shares of
Common Stock are fully paid and non-assessable.

     The holders of Common Stock are entitled to one vote per share for the
election of Directors and in all other matters submitted to a vote of
stockholders. Holders of Common Stock are not entitled to cumulate their votes
for the election of Directors. Holders of Common Stock are not entitled to
preemptive rights.

     In order to approve any business combination, including any merger or
consolidation or the sale, lease, exchange or other disposition of all or
substantially all of our assets (including a disposition in connection with a
dissolution or winding up or liquidation), Article Five of our Certificate of
Incorporation requires the affirmative vote or consent of the holders of:

     o   a majority of the shares entitled to vote thereon, and

     o   a majority of any series or class of Preferred Stock entitled to vote
         as a class thereon.

Article Five may not be amended or repealed without the prior affirmative vote
or consent of the holders of:

     o   662/3% of all shares of stock entitled to vote thereon, and

     o   662/3% of any series or class of Preferred Stock, if the Board of
         Directors gives such series or class of Preferred Stock such right to
         vote as a class.

These provisions may have the effect of delaying, deterring or preventing a
change of control of our corporation.

     We currently do not pay cash dividends on the Common Stock. We have not
paid cash dividends on the Common Stock since the third quarter of 1981. Our
Board of Directors, at its discretion, may declare dividends. The Board of
Directors will consider, among other factors, our current and projected earnings
and liquidity position. We do not expect to begin making dividend payments in
the foreseeable future.

     Our payment of cash dividends is subject to certain restrictions. Some of
our debt securities impose restrictions on our ability to declare or pay cash
dividends and make certain distributions on our capital stock. Because of these
restrictions, no funds are available for us to make cash dividends.

     The Common Stock is listed on the New York Stock Exchange. Our transfer
agent and registrar for the Common Stock is American Stock Transfer & Trust
Company.



                                      -10-
<PAGE>   12

PREFERRED STOCK

     Subject to any limitations under Delaware law, our Board of Directors,
without any further vote or action by the stockholders, may:

     o   authorize the issuance of Preferred Stock in one or more series,

     o   establish from time to time the number of shares to be included in each
         such series,

     o   fix the rights, preferences and privileges of the shares of each wholly
         unissued series of Preferred Stock and any qualifications, limitations
         or restrictions therein, and

     o   increase or decrease the number of shares of any such series (but not
         below the number of shares of such series then outstanding).

     The Board of Directors may authorize the issuance of Preferred Stock with
voting or conversion rights that could adversely affect the voting power or
other rights of the holders of Common Stock. Our issuance of Preferred Stock, if
any, therefore, may have the effect of delaying, deferring or preventing a
change of control of our corporation.

     As of March 10, 1999, no shares of Preferred Stock were outstanding. We
have no current plan to issue any shares of Preferred Stock. Our Preferred Stock
is not entitled to preemptive rights.

MEETINGS OF THE STOCKHOLDERS

     Our Bylaws provide for annual meetings and special meetings of our
stockholders.

     Calling and Notice of Meetings. The Board of Directors designates the date
and time of our annual stockholders meetings. The Chairman of the Board of
Directors, the President, the Board of Directors or the majority of the
directors by written order, can call a special stockholders meetings. When a
stockholders meeting is called, we must provide written notice of the
stockholders meeting to the stockholders. We must provide notice of any
stockholders meeting to each stockholder entitled to vote not less than ten nor
more than sixty days before the stockholders meeting. A notice of a special
stockholders meeting must describe the purpose or purposes of the stockholders
meeting. The Board of Directors may fix, in advance, a record date on which we
determine which stockholders are entitled to notice of a stockholders meeting or
to vote at any stockholders meeting. The record date may not be more than sixty
nor less than ten days before the date of the stockholders meeting. We must also
prepare and make a complete list of the stockholders entitled to vote at a
stockholders meeting. We must prepare this list at least ten days before the
stockholders meeting. Any stockholder may examine this list for a period of ten
days prior to the stockholders meeting.

     Quorum and Voting. Stockholders may represent themselves or designate a
proxy to represent their shares at any stockholders meeting. The representation
of a majority of the shares of capital stock entitled to vote at a stockholders
meeting constitutes a quorum for the conduct of business at the stockholders
meeting. Our Certificate of Incorporation, our By-Laws, or applicable law may
contain special provisions requiring a certain percentage of votes of our
capital stock to decide a specific question brought before a stockholders
meeting at which a quorum is present. If no special provisions exist, then the
vote of the holders of a majority of the shares of capital stock entitled to
vote decides any question brought before the stockholders meeting.



                                      -11-
<PAGE>   13

LIMITATION OF LIABILITY AND INDEMNIFICATION

     Limitation of Liability. Our Certificate of Incorporation limits the
personal liability of our directors to our corporation. It provides that no
director shall be personally liable to our corporation or its stockholders for a
breach of a fiduciary duty as a director, unless the limitation is not permitted
by the Delaware General Corporation Law. This includes liability for:

     o   any breach of the director's duty of loyalty to our corporation or its
         stockholders,

     o   any act or omission not in good faith,

     o   any act or omission that involves gross negligence,

     o   any act or omission that involves intentional misconduct or a knowing
         violation of law,

     o   any transaction from which the director derived any improper personal
         benefit, or

     o   any act or omission where the liability of the director is expressly
         provided by the Delaware General Corporation Law.

     As a result of these limitations, we and our stockholders may be unable to
obtain monetary damages from a director for breach of the duty of care. We and
our stockholders may still seek injunctive or other equitable relief for a
director's alleged breach of such director's fiduciary duty. If these equitable
remedies are unavailable, however, we and our stockholders may not have an
effective remedy against the challenged conduct.

     Indemnification. Our Certificate of Incorporation and Bylaws provide rights
of indemnification for all of our officers and directors.

THE DELAWARE BUSINESS COMBINATION ACT

     We are subject to the provisions of Section 203 of the Delaware General
Corporation Law. Section 203 prohibits a publicly held Delaware corporation from
engaging in a "business combination" with an "interested stockholder" for a
period of three years after the date of the transaction in which the person
became an interested stockholder, unless the business combination is approved in
the manner described by Section 203. A "business combination" includes mergers,
asset sales and certain other transactions that financially benefit the
interested stockholder. Subject to certain exceptions, an "interested
stockholder" is a person who, together with affiliates and associates, owns, or
within three years did own, 15% or more of the company's voting stock. The
stockholders holding a majority of the shares of the company's voting stock may
amend the company's Certificate of Incorporation or Bylaws to effectively avoid
the provisions of this statute. We do not intend to "elect out" of this statute
by amending our Certificate of Incorporation or Bylaws.

                              PLAN OF DISTRIBUTION

     We will not receive any of the proceeds of the sale of the Common Stock
offered hereby. The Common Stock may be sold from time to time to purchasers
directly by the selling stockholders. Alternatively, the selling stockholders
may from time to time offer the Common Stock through brokers, dealers or agents
who may receive compensation in the form of discounts, concessions or
commissions from the selling stockholders and/or the purchasers of the Common
Stock for whom they may act as agent. The selling stockholders and any such
brokers, dealers or agents who participate in the distribution of the Common



                                      -12-
<PAGE>   14
Stock may be deemed to be "underwriters", and any profits on the sale of the
Common Stock by them and any discounts, commissions or concessions received by
any such brokers, dealers or agents might be deemed to be underwriting discounts
and commissions under the Securities Act of 1933. To the extent the selling
stockholders may be deemed to be underwriters, the selling stockholders may be
subject to certain statutory liabilities of the Common Stock Act, including, but
not limited to, Sections 11, 12 and 17 of the Common Stock Act and Rule 10b-5
under the Securities Exchange Act of 1934.

     The Common Stock offered hereby may be sold from time to time by the
selling stockholders, or, to the extent permitted, by pledgees, donees,
transferees or other successors in interest. The Common Stock may be disposed of
from time to time in one or more transactions through any one or more of the
following:

     o   the purchasers directly,

     o   in ordinary brokerage transactions and transactions in which the broker
         solicits purchasers,

     o   through underwriters or dealers who may receive compensation in the
         form of underwriting discounts, concessions, or commissions from the
         selling stockholders or such successors in interest and/or from the
         purchasers of the Common Stock for whom they may act as agent,

     o   the writing of options on the Common Stock,

     o   the pledge of the Common Stock as security for any loan or obligation,
         including pledges to brokers or dealers who may, from time to time,
         themselves effect distributions of the Common Stock or interests
         therein,

     o   purchases by a broker or dealer as principal and resale by such broker
         or dealer for its own account,

     o   a block trade in which the broker or dealer so engaged will attempt to
         sell the securities as agent but may position and resell a portion of
         the block as principal to facilitate the transaction,

     o   an exchange distribution in accordance with the rules of such exchange
         or transactions in the over the counter market,

     o   privately negotiated transactions,

     o    short sales, or

     o   a combination of any of the above transactions.

Such sales may be made at prices and at terms then prevailing or at prices
related to the then current market price or at negotiated prices and terms. In
effecting sales, brokers or dealers may arrange for other brokers or dealers to
participate. From time to time, the selling stockholders may engage in short
sales, short sales against the box, puts and calls and other transactions in the
Common Stock or other securities issued by us or derivatives thereof, and may
sell and deliver the Common Stock in connection therewith or in settlement of
securities loans.

     The selling stockholders or such successors in interest, and any
underwriters, brokers, dealers or agents that participate in the distribution of
the Common Stock, may be deemed to be "underwriters" within the meaning of the
Securities Act of 1933, and any profit on the sale of the Common Stock by them



                                      -13-
<PAGE>   15

and any discounts, commissions or concessions received by any such underwriters,
brokers, dealers or agents may be deemed to be underwriting commissions or
discounts under the Securities Act of 1933.

     At any time a particular offer of the Common Stock is made, a revised
Prospectus or Prospectus Supplement, if required, will be distributed which will
set forth the aggregate amount and type of securities being offered and the
terms of the offering, including the name or names of any underwriters, dealers
or agents, any discounts, commissions and other items constituting compensation
from the selling stockholders and any discounts, commissions or concessions
allowed or reallowed or paid to dealers. Such Prospectus Supplement and, if
necessary, a post-effective amendment to the Registration Statement of which
this Prospectus is a part, will be filed with the Securities and Exchange
Commission to reflect the disclosure of additional information with respect to
the distribution of the Common Stock. In addition, the Common Stock covered by
this Prospectus may be sold in private transactions or under Rule 144 rather
than pursuant to this Prospectus.

     To the best of our knowledge, there are currently no plans, arrangements or
understandings between any selling stockholders and any broker, dealer, agent or
underwriter regarding the sale of the Common Stock by the selling stockholders.
There is no assurance that any selling stockholder will sell any or all of the
Common Stock offered by it hereunder or that any such selling stockholder will
not transfer, devise or gift such Common Stock by other means not described
herein.

     The selling stockholders and any other person participating in such
distribution will be subject to applicable provisions of the Securities Exchange
Act of 1934 and the rules and regulations thereunder, including, without
limitation, Regulation M, which may limit the timing of purchases and sales of
any of the Common Stock by the selling stockholders and any other such person.
Furthermore, under Regulation M under the Securities Exchange Act of 1934, any
person engaged in the distribution of the Common Stock may not simultaneously
engage in market-making activities with respect to the particular Common Stock
being distributed for certain periods prior to the commencement of such
distribution. All of the foregoing may affect the marketability of the Common
Stock and the ability of any person or entity to engage in market-making
activities with respect to the Common Stock.

     Pursuant to the Registration Rights Agreement entered into in connection
with the offer and sale of the 5% Convertible Notes, each of us and the selling
stockholders will be indemnified by the other against certain liabilities,
including certain liabilities under the Securities Act of 1933, or will be
entitled to contribution in connection therewith.

     We have agreed to pay substantially all of the expenses incidental to the
registration, offering and sale of the Common Stock to the public other than
commissions, fees and discounts of underwriters, brokers, dealers and agents.

                              SELLING STOCKHOLDERS

     The selling stockholders consist of Elliott Associates, L.P., a Delaware
limited partnership, and Westgate International, L.P., a Cayman Islands limited
partnership. The selling stockholders currently hold our 5% Convertible Notes
that are convertible into Common Stock. The shares of Common Stock that may be
sold by the selling stockholders under this Prospectus are issuable upon
conversion of our 5% Convertible Notes. Permitted transferees, pledges, donees
and successors of Elliott Associates, L.P. and Westgate International, L.P. that
may in the future hold 5% Convertible Notes or Common Stock issued upon
conversion of 5% Convertible Notes may also be selling stockholders that use
this Prospectus.



                                      -14-
<PAGE>   16

     The following table sets forth:

     o   the name of each selling stockholder,

     o   the amount of Common Stock owned by each selling stockholder (assuming
         no shares of Common Stock have been sold since the date on which such
         selling stockholder provided such information to us), and

     o   a current estimate of the maximum amount of Common Stock that may be
         offered for the account of each selling stockholder under this
         Prospectus.

     The following table is based upon information furnished to us by the
selling stockholders. We make no representation as to the accuracy of the
information provided regarding beneficial ownership of Common Stock by the
selling stockholders to the extent that such beneficial ownership is not
reflected in our records.

<TABLE>
<CAPTION>
                                        COMMON STOCK 
              NAME OF                    OWNED PRIOR             COMMON STOCK 
       SELLING STOCKHOLDER(1)            TO OFFERING            OFFERED HEREBY
- ---------------------------------       --------------         ----------------
<S>                                     <C>                    <C>         
Elliott Associates, L.P.                11,300,916(2)            5,262,116(3)
Westgate International, L.P.            23,681,201(4)            5,262,116(3)
                                        ------------
Total                                   28,027,082(5) 
                                        ============
</TABLE>

- ---------------

(1)  The information set forth herein is as of March 4, 1999.

(2)  Includes (a) 1,705,000 shares of Common Stock issuable upon exchange of
     certain of our 8% Senior Exchangeable Notes due 2000 currently owned by
     Elliott Associates, L.P., (b) 4,433,800 shares of Common Stock currently
     owned by Elliott Associates, L.P. and (c) an estimated amount of 5,162,116
     shares of Common Stock issuable upon conversion of the 5% Convertible Notes
     currently owned by Elliott Associates, L.P., subject to the limitation in 
     footnote 5.

(3)  This number reflects an estimate of the number of shares of Common Stock
     each selling stockholder may receive upon conversion of their 5%
     Convertible Notes. As discussed in footnote 5 below, the aggregate amount
     of Common Stock issuable to Elliott Associates, L.P. and Westgate
     International, L.P. is subject to certain limitations.


                                      -15-
<PAGE>   17

(4)  Includes (a) 16,690,000 shares of Common Stock issuable upon exchange of
     certain of our 8% Senior Exchangeable Notes due 2000 currently owned by
     Westgate International, L.P., (b) 1,729,085 shares of Common Stock issuable
     upon exercise of certain warrants to purchase Common Stock currently owned
     by Westgate International, L.P., (c) 100,000 shares of Common Stock
     currently owned by Westgate International, L.P. and (d) the estimated
     amount of 5,162,116 shares of Common Stock issuable upon conversion of the
     5% Convertible Notes currently owned by Westgate International, L.P.,
     subject to the limitations described on footnote 5 below. Martley
     International, Inc., the investment manager for Westgate International,
     L.P., shares dispositive and voting power over the shares of Common Stock
     owned by Westgate International, L.P.

(5)  The 5% Convertible Notes state that a holder and its affiliates may not
     convert 5% Convertible Notes if, after such conversion, the holder and its
     affiliates would in the aggregate be the beneficial owner of more than
     9.99% of the total number of outstanding shares of Common Stock. The holder
     has the ability to waive this limitation upon 61 days' notice and under
     certain other circumstances. In addition to such limitation, the maximum
     amount of shares of Common Stock that may be issued upon conversion of the
     5% Convertible Notes and sold under this Prospectus is 19,000,000 shares.
     However, this maximum number is subject to certain anti-dilution
     adjustments. The actual number of shares issuable upon conversion of the 5%
     Convertible Notes will vary depending on, among other things, the price of
     the Common Stock at the time of conversion, the application of the
     limitations in the 5% Convertible Notes upon the number of shares that may
     be issued to a selling stockholder and possible waivers of such
     limitations, any sales of 5% Convertible Notes by each selling stockholder
     and each selling stockholder's decision whether and to what extent to
     convert any of its 5% Convertible Notes. If the limitation on the
     percentage of outstanding Common Stock that may be issued to a selling
     stockholder is waived, then the number of shares of Common Stock owned
     prior to the offering by Elliott Associates, L.P. and Westgate 
     International, L.P. collectively would be 34,982,117 based on the current 
     conversion price of the 5% Convertible Notes.

     There can be no assurance that the selling stockholders will sell any or
all of the Common Stock offered hereby. Because the selling stockholders may
sell pursuant to this Prospectus none, some or all of the Common Stock issuable
upon conversion of the 5% Convertible Notes they presently hold, no estimate can
be given as to the amount of the Common Stock that will be held by the selling
stockholders upon termination of any such sales. In addition, the selling
stockholders identified above may have sold, transferred or otherwise disposed
of all or a portion of their 5% Convertible Notes or Common Stock since the date
on which they provided us the information regarding their ownership of 5%
Convertible Notes and Common Stock in transactions exempt from the registration
requirements of the Securities Act of 1993. See "Plan of Distribution."

     Only selling stockholders identified above who beneficially own the Common
Stock set forth opposite each such selling stockholder's name on the effective
date of the Registration Statement of which this Prospectus forms a part may
sell Common Stock pursuant to this Prospectus. We may from time to time include
additional selling stockholders in supplements to this Prospectus.

     Other than as a result of the ownership of the 5% Convertible Notes and a
combined aggregate principal amount of approximately $18.4 million of our 8%
Senior Exchangeable Notes due 2000, to the best of our knowledge, none of the
selling stockholders had any material relationship with us within the three year
period ending on the date of this Prospectus.

                         SHARES ELIGIBLE FOR FUTURE SALE

     Except for our "affiliates", holders of the shares of Common Stock offered
and sold in this offering will be able to freely trade these shares without
restrictions or further registration under the Securities Act of 1933. As
defined in Rule 144, an "affiliate" of an issuer is a person that directly, or
indirectly through the use of one or more intermediaries, controls, or is
controlled by, or is under the common control with, such issuer. An "affiliate"
of ours that owns our Common Stock may only resell the Common Stock if the
shares are registered under the Securities Act of 1933, unless an exemption from
registration is available, including the exemption contained in Rule 144.

     In general, under Rule 144 as currently in effect, a person (or persons
whose shares are aggregated) who has beneficially owned his or her shares for at
least one year, including an "affiliate," is entitled to sell his or her shares
subject to certain volume limitations. A person may sell his or her shares if
the number of shares sold does not exceed the greater of 1% of the then
outstanding shares or the average weekly trading volume of the then outstanding
shares during the four calendar weeks preceding each such sale. A person (or
persons whose sales are aggregated) who is not deemed our "affiliate", and who
has beneficially owned shares for at least two years, may sell such shares under
Rule 144 without regard to these volume limitations.





                                      -16-
<PAGE>   18

                                  LEGAL MATTERS

     Our outside attorneys from the Dallas office of Haynes and Boone, LLP, will
issue an opinion for us about the legality of the offered shares of Common Stock
offered in this Prospectus.

                                     EXPERTS

     The consolidated financial statement of Sunshine Mining and Refining
Company appearing in Sunshine Mining and Refining Company's Annual Report (Form
10-K) for the year ended December 31, 1998, have been audited by Ernst & Young,
LLP, independent auditors, as set forth in their report thereon included therein
and incorporated herein by reference. Such consolidated financial statements are
incorporated herein by reference in reliance upon such report given on the
authority of such firm as experts in accounting and auditing.





                                      -17-
<PAGE>   19

================================================================================





                           UP TO 19,000,000 SHARES OF
                                  COMMON STOCK







                               SUNSHINE MINING AND
                                REFINING COMPANY





                             ---------------------
                                   PROSPECTUS
                             ---------------------



                            ___________________, 1999






================================================================================
<PAGE>   20




                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.    OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

<TABLE>

<S>                                                                                                       <C>       
Securities and Exchange Commission Registration Fee....................................................   $    5,700
NYSE Listing Fee.......................................................................................       66,500
Printing and Photocopying Expenses.....................................................................       10,000
Accounting Fees and Expenses...........................................................................        5,000
Legal Fees and Expenses................................................................................       20,000
Miscellaneous Expenses.................................................................................        5,000
                                                                                                          ----------         

   Total...............................................................................................   $  112,200
                                                                                                          ========== 
</TABLE>


         All of the above expenses except the Securities and Exchange Commission
registration fee and the NYSE listing fee are estimated. All of such expenses
will be borne by the Registrant.

ITEM 15.    INDEMNIFICATION OF DIRECTORS AND OFFICERS

         The information set forth pursuant to Item 20 of the Registrant's
Registration Statement on Form S-4 (Registration No. 33-98876) is incorporated
herein by reference.

ITEM 16.    EXHIBITS

<TABLE>
<CAPTION>

    EXHIBIT NO.                                   Exhibit
    -----------                                   -------
<S>                 <C> 
     * 4.1          Certificate of Incorporation, filed as Exhibit 3.1 to the Registrant's Registration
                    Statement on Form S-4 (Registration No. 33-98876), which exhibit is incorporated
                    herein by reference.

     * 4.2          Amendment to Certificate of Incorporation, filed as Exhibit 4.1 to the Registrant's
                    Current Report on Form 8-K dated May 22, 1996 (File No. 001-100121, which
                    exhibit is incorporated herein by reference.

     * 4.3          Bylaws, filed as Exhibit 3.3 to the Registrant's Annual Report on Form 10-K for
                    the fiscal year ended December 31, 1998, which exhibit is incorporated herein by reference.

     * 4.4          Specimen Common Stock Certificate, filed as Exhibit 4.2 to the Registrant's
                    Registration Statement on Form S-1 (Registration No. 33-63446), which exhibit is
                    incorporated herein by reference.

     * 4.5          Warrant Agreement, dated as of February 1, 1996, between Sunshine Merger
                    Company and American Stock Transfer & Trust Company, as Warrant Agent, filed
                    as Exhibit 4.1 to the Registrant's Registration Statement on Form S-4 (Registration
                    No. 33-98876), which exhibit is incorporated herein by reference.

     * 4.6          Warrant Agreement, dated as of February 3, 1994, between the Registrant and
                    American Stock Transfer & Trust Company, as Warrant Agent, filed as Exhibit 4.3
                    to the Registrant's Registration Statement on Form S-1 (Registration No.
                    33-73608), which exhibit is incorporated herein by reference.

</TABLE>

                                      II-1

<PAGE>   21


<TABLE>

<S>                 <C> 
     * 4.7          Form of Supplemental Warrant Agreement, dated as of February 1, 1996, between
                    Sunshine Merger Company and American Stock Transfer & Trust Company, as
                    Warrant Agent, filed as Exhibit 4.10 to the Registrant's Registration Statement on
                    Form S-4 (Registration No. 33-98876), which exhibit is incorporated herein by
                    reference.

     * 4.8          Warrant Certificate, filed as Exhibit 4.3 to the Registrant's Registration Statement
                    on Form S-4 (Registration No. 33-98876), which exhibit is incorporated herein by
                    reference.

     * 4.9          Form of Warrant Certificate, filed as Exhibit 4.4 to the Registrant's Registration
                    Statement on Form S-1 (Registration No. 33-73608), which exhibit is incorporated
                    herein by reference.

     * 4.10         Form of Indenture, dated as of July 15, 1988, between the Registrant and MTrust Corp.,
                    National Association, with respect to the Registrant's Convertible Subordinated
                    Debentures due July 15, 2008, filed as Exhibit 4.25 to the Registrant's Registration
                    Statement on Form S-3 (Registration No. 33-21159), which exhibit is incorporated
                    herein by reference.

     * 4.11         First Supplemental Indenture, dated as of August 8, 1988, Second Supplemental
                    Indenture, dated as of November 10, 1988, and Third Supplemental Indenture,
                    dated as of April 10, 1991, by and between the Registrant and Ameritrust Texas,
                    National Association, the successor to MTrust Corp., National Association, relating
                    to the issuance of the Registrant's Convertible Subordinated Debentures due
                    July 15, 2008, filed as Exhibit 4.3 to the Registrant's Annual Report on Form 10-K
                    for the fiscal year ended December 31, 1990, which exhibit is incorporated herein by
                    reference.

     * 4.12         Form of Fourth Supplemental Indenture, by and between the Registrant and Texas Commerce
                    Bank, National Association, as successor to Ameritrust Texas, National Association, 
                    formerly known as MTrust Corp., National Association, filed as Exhibit 4.10 to the 
                    Registrant's Registration Statement on Form S-4 (Registration No. 33-98876), which exhibit
                    is incorporated herein by reference.

     * 4.13         Trust Deed, dated March 21, 1996, between the Registrant, Sunshine Precious
                    Metals, Inc. and Marine Midland Bank and Form of Note, filed as Exhibits 4.5 and
                    4.6 to the Registrant's Registration Statement on Form S-3 (Registration No.
                    333-06537), which exhibits are incorporated herein by reference.

     * 4.14         Warrant Agreement, dated as of June 21, 1996, between the Registrant, Rauscher, Pierce
                    & Clark and HSBC Investment Banking Limited and Form of Warrant Certificate, filed as
                    Exhibits 4.7 and 4.8 to the Registrant's Registration Statement on Form S-3
                    (Registration No. 333-06537), which exhibits are incorporated herein by reference.

     * 4.15         Specimen form of Warrant to Purchase Common Stock issued on November 24, 1997, filed
                    as Exhibit 10.12 to the Registrant's Registration Statement on Form S-3 (Registration
                    No. 333-41641), which exhibit is incorporated herein by reference.

     * 4.16         Specimen form of Senior Convertible Promissory Note, filed as Exhibit 10.13 to the 
                    Registrant's Registration Statement on Form S-3 (Registration No. 333-41641), which
                    exhibit is incorporated herein by reference.

     * 4.17         Amendment, dated December 11, 1998, to Warrants to Purchase Common Stock issued on 
                    November 24, 1997, filed as Exhibit 4.16 to the Registrant's Annual Report on Form 10-K
                    for the fiscal year ended December 31, 1998, which exhibit is incorporated herein 
                    by reference.
</TABLE>


                                                       II-2

<PAGE>   22



<TABLE>

<S>                 <C> 

     * 4.18         Specimen form of 5% Convertible Promissory Note due January 28, 2001 filed as
                    Exhibit 4.2 to the Registrant's Current Report on Form 8-K dated January 28, 1999,
                    which exhibit is incorporated herein by reference.

   *** 5.1          Opinion of Haynes and Boone, LLP.

   *** 23.1         Consent of Haynes and Boone, LLP (included in the opinion filed as Exhibit 5.1).

    ** 23.2         Consent of Ernst & Young LLP.

    ** 24.1         Power of Attorney (set forth on signature page hereof).
</TABLE>

- --------------------------

*        Previously filed.
**       Filed herewith.
***      To be filed by amendment.

ITEM 17.      UNDERTAKINGS

         The undersigned Registrant hereby undertakes:

         (1) To file, during any period in which offers or sales are being made,
a post-effective amendment to this Registration Statement:

                  (i)      To include any prospectus required by Section
                           10(a)(3) of the Securities Act of 1933;

                  (ii)     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 of securities would not exceed that
                           which was registered) and any deviation from the low
                           or high end 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 represents
                           no more than 20% change in the maximum aggregate
                           offering price set forth in the "Calculation of
                           Registration Fee" table in the effective Registration
                           Statement); and

                  (iii)    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;

         Provided, however, that paragraphs (1)(i) and (1)(ii) do not apply if
the information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are
incorporated by reference in this Registration Statement.

         (2) 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 

                                      II-3

<PAGE>   23


securities offered therein, and the offering of such securities at that time
shall be deemed to be the initial bona fide offering thereof; and

         (3) 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.

         The undersigned Registrant hereby undertakes that, for the purposes of
determining any liability under the Securities Act of 1933, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 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 this
Registration Statement shall be deemed to be a new Registration Statement
relating to the securities offered herein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the
Securities Act and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
Registrant of expenses incurred or paid by a director, officer or controlling
person of the Registrant 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 Registrant 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 Securities
Act and will be governed by the final adjudication of such issue.

         The undersigned Registrant hereby undertakes that:

         (1) 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.

         (2) For the purpose of determining any liability under the Securities
Act of 1933, each post-effective amendment that contains a form of Prospectus
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.


                                      II-4

<PAGE>   24




                                   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-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Boise, State of Idaho, as of the 16th day of March,
1999.

                                      SUNSHINE MINING AND REFINING COMPANY

                                      By:  /s/ JOHN S. SIMKO
                                         ------------------------------------
                                                   John S. Simko
                                            Chief Executive Officer and
                                              Chairman of the Board




                                      II-5

<PAGE>   25




                                POWER OF ATTORNEY

         KNOW ALL MEN BY THESE PRESENTS, that each of the undersigned officers
and directors of Sunshine Mining and Refining Company (the "Company") hereby
constitutes and appoints John S. Simko and William W. Davis, or either of them
(with full power to each of them to act alone), his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and on
his behalf and in his name, place and stead, in any and all capacities, to sign,
execute and file any of the documents referred to below relating to the proposed
issuance and registration of shares of Common Stock and the Registration
Statement on Form S-3 under the Securities Act of 1933, as amended, pertaining
thereto, including any amendments increasing the amount of securities for which
registration is being sought, with all exhibits and any and all documents
required to be filed with respect thereto with any regulatory authority,
granting unto said attorneys, and each of them, full power and authority to do
and perform each and every act and thing requisite and necessary to be done in
and about the premises in order to effectuate the same as fully to all intents
and purposes as he himself might or could do if personally present, thereby
ratifying and confirming all that said attorneys-in-fact and agents, or either
of them, or their or his substitute or substitutes, may lawfully do or cause to
be done.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and as of the 16th day of March, 1999:

<TABLE>
<CAPTION>
             SIGNATURE                                            TITLE
             ---------                                            ----- 
<S>                                                   <C> 
/s/ JOHN S. SIMKO                                     
- ---------------------------------                     Director, Chief Executive Officer and 
John S. Simko                                         Chairman of the Board            


/s/ G. CHRIS ANDERSEN                                             
- ---------------------------------                     Director 
G. Chris Andersen


/s/ DANIEL D. JACKSON                                 
- ---------------------------------                     Director 
Daniel D. Jackson


/s/ V. DALE BABBITT  
- ---------------------------------                     Director 
V. Dale Babbitt


/s/ WILLIAM W. DAVIS                                              
- ---------------------------------                     Executive Vice President, 
William W. Davis                                      Chief Financial and
                                                      Accounting Officer

/s/ ROBERT B. SMITH, JR.                              
- ---------------------------------                     Director      
Robert B. Smith, Jr.


/s/ OREN G. SHAFFER                                   
- ---------------------------------                     Director 
Oren G. Shaffer


- ---------------------------------                     Director
George M. Elvin
</TABLE>



                                      II-6

<PAGE>   26




                                INDEX TO EXHIBITS
<TABLE>
<CAPTION>

    EXHIBIT NO.     DESCRIPTION
    -----------     -----------
<S>                 <C> 
     * 4.1          Certificate of Incorporation, filed as Exhibit 3.1 to the Registrant's Registration
                    Statement on Form S-4 (Registration No. 33-98876), which exhibit is incorporated
                    herein by reference.

     * 4.2          Amendment to Certificate of Incorporation, filed as Exhibit 4.1 to the Registrant's
                    Current Report on Form 8-K dated May 22, 1996 (File No. 001-100121, which
                    exhibit is incorporated herein by reference.

     * 4.3          Bylaws, filed as Exhibit 3.3 to the Registrant's Annual Report on Form 10-K for the
                    fiscal year ended December 31, 1998, which exhibit is incorporated herein by reference.

     * 4.4          Specimen Common Stock Certificate, filed as Exhibit 4.2 to the Registrant's
                    Registration Statement on Form S-1 (Registration No. 33-63446), which exhibit is
                    incorporated herein by reference.

     * 4.5          Warrant Agreement, dated as of February 1, 1996, between Sunshine Merger
                    Company and American Stock Transfer & Trust Company, as Warrant Agent, filed
                    as Exhibit 4.1 to the Registrant's Registration Statement on Form S-4 (Registration
                    No. 33-98876), which exhibit is incorporated herein by reference.

     * 4.6          Warrant Agreement, dated as of February 3, 1994, between the Registrant and
                    American Stock Transfer & Trust Company, as Warrant Agent, filed as Exhibit 4.3
                    to the Registrant's Registration Statement on Form S-1 (Registration No.
                    33-73608), which exhibit is incorporated herein by reference.

     * 4.7          Form of Supplemental Warrant Agreement, dated as of February 1, 1996, between
                    Sunshine Merger Company and American Stock Transfer & Trust Company, as
                    Warrant Agent, filed as Exhibit 4.10 to the Registrant's Registration Statement on
                    Form S-4 (Registration No. 33-98876), which exhibit is incorporated herein by
                    reference.

     * 4.8          Warrant Certificate, filed as Exhibit 4.3 to the Registrant's Registration Statement
                    on Form S-4 (Registration No. 33-98876), which exhibit is incorporated herein by
                    reference.

     * 4.9          Form of Warrant Certificate, filed as Exhibit 4.4 to the Registrant's Registration
                    Statement on Form S-1 (Registration No. 33-73608), which exhibit is incorporated
                    herein by reference.

     * 4.10         Form of Indenture, dated as of July 15, 1988, between the Registrant and MTrust Corp.,
                    National Association, with respect to the Registrant's Convertible Subordinated
                    Debentures due July 15, 2008, filed as Exhibit 4.25 to the Registrant's Registration
                    Statement on Form S-3 (Registration No. 33-21159), which exhibit is incorporated
                    herein by reference.

     * 4.11         First Supplemental Indenture, dated as of August 8, 1988, Second Supplemental
                    Indenture, dated as of November 10, 1988, and Third Supplemental Indenture,
                    dated as of April 10, 1991, by and between the Registrant and Ameritrust Texas,
                    National Association, the successor to MTrust Corp., National Association, relating
                    to the issuance of the Registrant's Convertible Subordinated Debentures due
                    July 15, 2008, filed as Exhibit 4.3 to the Registrant's Annual Report on Form 10-K
                    for the fiscal year ended December 31, 1990, which exhibit is incorporated herein by
                    reference.
</TABLE>


<PAGE>   27

<TABLE>

<S>                 <C> 
     * 4.12         Form of Fourth Supplemental Indenture, by and between the Registrant and Texas Commerce
                    Bank, National Association, as successor to Ameritrust Texas, National Association, 
                    formerly known as MTrust Corp., National Association, filed as Exhibit 4.10 to the 
                    Registrant's Registration Statement on Form S-4 (Registration No. 33-98876), which exhibit
                    is incorporated herein by reference.

     * 4.13         Trust Deed, dated March 21, 1996, between the Registrant, Sunshine Precious
                    Metals, Inc. and Marine Midland Bank and Form of Note, filed as Exhibits 4.5 and
                    4.6 to the Registrant's Registration Statement on Form S-3 (Registration No.
                    333-06537), which exhibits are incorporated herein by reference.

     * 4.14         Warrant Agreement, dated as of June 21, 1996, between the Registrant, Rauscher, Pierce
                    & Clark and HSBC Investment Banking Limited and Form of Warrant Certificate, filed as
                    Exhibits 4.7 and 4.8 to the Registrant's Registration Statement on Form S-3
                    (Registration No. 333-06537), which exhibits are incorporated herein by reference.

     * 4.15         Specimen form of Warrant to Purchase Common Stock issued on November 24, 1997, filed
                    as Exhibit 10.12 to the Registrant's Registration Statement on Form S-3 (Registration
                    No. 333-41641), which exhibit is incorporated herein by reference.

     * 4.16         Specimen form of Senior Convertible Promissory Note, filed as Exhibit 10.13 to the 
                    Registrant's Registration Statement on Form S-3 (Registration No. 333-41641), which
                    exhibit is incorporated herein by reference.

     * 4.17         Amendment, dated December 11, 1998, to Warrants to Purchase Common Stock issued on 
                    November 24, 1997, filed as Exhibit 4.16 to the Registrant's Annual Report on Form 10-K
                    for the fiscal year ended December 31, 1998, which exhibit is incorporated herein 
                    by reference.

     * 4.18         Specimen form of 5% Convertible Promissory Note due January 28, 2001 filed as
                    Exhibit 4.2 to the Registrant's Current Report on Form 8-K dated January 28, 1999,
                    which exhibit is incorporated herein by reference.

   *** 5.1          Opinion of Haynes and Boone, LLP.

   *** 23.1         Consent of Haynes and Boone, LLP (included in the opinion filed as Exhibit 5.1).

    ** 23.2         Consent of Ernst & Young LLP.

    ** 24.1         Power of Attorney (set forth on signature page hereof).
</TABLE>

- --------------------------

*        Previously filed.
**       Filed herewith.
***      To be filed by amendment.


<PAGE>   1
                                                                    Exhibit 23.2


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the Form
S-3 and related Prospectus of Sunshine Mining and Refining Company for the
registration of up to 19,000,000 shares of its common stock and to the
incorporation by reference therein of our report dated February 26, 1999, with
respect to the consolidated financial statements of Sunshine Mining and Refining
Company included in its Annual Report on Form 10-K for the year ended December
31, 1998, filed with the Securities and Exchange Commission.




                                              ERNST & YOUNG LLP


Dallas, Texas
March 11, 1999


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