ESCO ELECTRONICS CORP
10-K405, 1998-12-22
SEARCH, DETECTION, NAVAGATION, GUIDANCE, AERONAUTICAL SYS
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                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549

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

                                    FORM 10-K


     [X]          ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE 
                  SECURITIES EXCHANGE ACT OF 1934
                  For the fiscal year ended September 30, 1998

                                       OR

     [ ]          TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF  THE
                  SECURITIES EXCHANGE ACT OF 1934
                  For the transition period _________ to _________

                         Commission file number: 1-10596

                          ESCO Electronics Corporation
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)


            Missouri                                    43-1554045
            (STATE OR OTHER JURISDICTION                (I.R.S. EMPLOYER
            OF INCORPORATION OR ORGANIZATION)           IDENTIFICATION NO.)

            8888 Ladue Road, Ste. 200
            St. Louis, Missouri                         63124-2090
            (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)    (ZIP CODE)

           REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE:

                                 (314) 213-7200


         SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

                                                       Name of Each
                                                       Exchange on
         Title of Each Class                           Which Registered
         -------------------                           ----------------

         Common Stock Trust Receipts                   New York Stock
                                                       Exchange, Inc.

         Common Stock, par value $0.01 per             New York Stock
         share                                         Exchange, Inc.

         Preferred Stock Purchase Rights               New York Stock
                                                       Exchange, Inc.




                            (Cover page 1 of 2 pages)






<PAGE>   2

           SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

                                      None


Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to filing requirements
for the past 90 days. Yes X No

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form l0-K or any amendment to
this Form l0-K. [X]

Aggregate market value of the Common Stock Trust Receipts held by non-affiliates
of the registrant as of close of business on December 18, 1998:
$104,266,488.*


       * For purpose of this calculation only, without 
       determining whether the following are affiliates of the 
       registrant, the registrant has assumed that (i) its 
       directors and executive officers are affiliates, and (ii) 
       no party who has filed a Schedule 13D or 13G is an affiliate.


Number of Common Stock Trust Receipts outstanding at December 18, 1998:
12,267,321 Receipts.


                      DOCUMENTS INCORPORATED BY REFERENCE:

1.   Portions of the registrant's Annual Report to Stockholders for fiscal year
     ended September 30, 1998 (the "1998 Annual Report") (Parts I and II).

2.   Portions of the registrant's Proxy Statement dated December 4, 1998 (Part
     III).



















                            (Cover page 2 of 2 pages)








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                          ESCO ELECTRONICS CORPORATION
                       INDEX TO ANNUAL REPORT ON FORM 10-K



     Item    Description                                              Page
     ---------------------------------------------------------------  ----

     Part I

     1.      Business ..............................................     1

              The Company ..........................................     1
              Products .............................................     1
              Marketing and Sales ..................................     4
              Government Defense Contracts .........................     5
              Intellectual Property ................................     6
              Backlog ..............................................     7
              Purchased Components and Raw Materials ...............     7
              Competition ..........................................     7
              Research and Development .............................     8
              Environmental Matters ................................     8
              Employees ............................................     9
              Financing ............................................     9
              History of the Business ..............................     9
              Forward-Looking Information ..........................    10

     2.      Properties ............................................    11

     3.      Legal Proceedings .....................................    12

     4.      Submission of Matters to a Vote of Security Holders ...    13

     Executive Officers of the Registrant ..........................    13



     Part II

     5.      Market for the Registrant's Common Equity and Related
             Stockholder Matters ...................................    13

     6.      Selected Financial Data ...............................    14

     7.      Management's Discussion and Analysis of Financial 
             Condition and Results of Operations ...................    14

     7A.     Quantitative and Qualitative Disclosures About 
             Market Risk ...........................................    14

     8.      Financial Statements and Supplementary Data ...........    14

     9.      Changes in and Disagreements with Accountants on 
             Accounting and Financial Disclosure ...................    14





                                      I









<PAGE>   4

Item      Description                                            Page
- ----      -----------                                            ----

Part III

10.       Directors and Executive Officers of the Registrant ....  14

11.       Executive Compensation ................................  14

12.       Security Ownership of Certain Beneficial Owners and 
          Management ............................................  15

13.       Certain Relationships and Related Transactions ........  15


Part IV

14.       Exhibits, Financial Statement Schedules, and Reports 
          on Form 8-K ...........................................  15

SIGNATURES ......................................................  20

INDEX TO EXHIBITS ...............................................  21





























                                      II








<PAGE>   5


                                     PART I

ITEM 1. BUSINESS

THE COMPANY

     ESCO Electronics Corporation ("ESCO") is a holding company for the
following-listed operating subsidiaries: Distribution Control Systems, Inc.
("DCSI"), EMC Test Systems, L.P. ("ETS"), Euroshield OY, Filtertek Inc.
("Filtertek"), Filtertek BV, Filtertek de Puerto Rico, Inc., Filtertek SA, PTI
Technologies Inc. ("PTI"), PTI Advanced Filtration Inc. ("PTI Advanced"), PTI
Technologies Limited ("PTI Limited"), Rantec Microwave & Electronics, Inc.
("Rantec"), Systems & Electronics Inc. ("SEI"), and VACCO Industries ("VACCO").
These operating subsidiaries are subsidiaries of Defense Holding Corp.
("DHC"), a wholly-owned direct subsidiary of ESCO.  ESCO and its direct and
indirect subsidiaries are hereinafter referred to collectively as the
"Company".

     The above-listed operating subsidiaries are engaged in the research,
development, manufacture, sale and support of a wide variety of commercial and
defense systems and products. Commercial items are supplied to a variety of
customers worldwide. Defense items principally are supplied to the United States
Government under prime contracts with the Army, Navy and Air Force and under
subcontracts with their prime contractors, and are also sold to foreign
customers. The Company's businesses are subject to a number of risks and
uncertainties, including without limitation those discussed below. See Item 3.
"Legal Proceedings" and "Management's Discussion and Analysis" appearing in the
1998 Annual Report.

     On December 31, 1997, ESCO acquired Euroshield OY, a company located in
Eura, Finland. On July 1, 1998, ESCO acquired Advanced Membrane Technology,
Inc., based in San Diego, California, and renamed that company "PTI Advanced
Filtration Inc."


PRODUCTS

     The Company operates in two principal industry segments: commercial and
defense. See Note 11 of the Notes to Consolidated Financial Statements in the
1998 Annual Report, which Note is herein incorporated by reference.


                              COMMERCIAL PRODUCTS
                              -------------------

     The Company's commercial products are described below.


                             FILTRATION/FLUID FLOW
                             ---------------------

     PTI, PTI Advanced and PTI Limited develop and manufacture a wide range of
filtration products. PTI is a leading supplier of filters to the commercial
aerospace market. PTI's industrial business includes the supply of filtration
solutions to the industrial and mobile fluid power markets and petrochemical
processing industry. PTI also manufactures microfiltration products used in a
variety of commercial markets and applications. The filtration membranes for
many of these applications are, or will be, produced by PTI Advanced, which also
supplies filtration systems for use in the dairy industry and in industrial
paint operations. PTI Limited manufactures and distributes filter products
primarily in the European industrial marketplace. In fiscal year 1998, PTI
formed a joint venture in India, known as "SANMAR-PTI Filters Limited," with
SANMAR Engineering Corporation to manufacture and sell filtration products for
the Indian and other international markets. VACCO and PTI jointly develop and
manufacture industrial filtration elements and systems primarily

                                      1




<PAGE>   6



used within the petrochemical and nuclear industries, where a premium is placed
on superior performance in a harsh environment. VACCO supplies latch valves,
check valves and filters to the aerospace industry, primarily for use in
satellite propulsion systems. VACCO also uses its etched disk technology to
produce quiet valves and manifolds for U.S. Navy applications.

     Filtertek develops and manufactures a broad range of high-volume, original
equipment manufacturer ("OEM") filtration products at its facilities in North
America, South America and Europe. Filtertek's products, which are centered
around its insert injection-molding technology wherein a filter medium is
inserted into the tooling prior to injection-molding of the filter housing, have
widespread applications in the medical and health care markets, automotive fluid
systems, and other commercial and industrial markets. A typical application can
require daily production of many thousands of units, at very high levels of
quality, and is generally produced in highly-automated manufacturing cells. Many
of Filtertek's products are patented or incorporate proprietary product or
process design, or both. In fiscal year 1998, Filtertek introduced a number of
new products, including an automotive transmission sump filter and products for
medical intravenous ("I.V.") application. Products with applications in water
filtration, blood filtration and fuel filtration are nearing completion of
development, with market introduction planned in fiscal year 1999.


                              COMMUNICATIONS/TEST
                              -------------------

     ETS designs and manufactures electromagnetic compatibility ("EMC") test
equipment. It also supplies controlled radio frequency testing environments
(anechoic chambers), shielded rooms for high security data processing and secure
communication, and electromagnetic absorption materials. ETS's products include
antennas, antenna masts, turntables, current probes, field probes, TEM
(transverse electromagnetic) cells, GTEM (gigahertz transverse electromagnetic)
cells, shielded rooms and boxes, microwave absorber, calibration equipment and
other test accessories required to do EMC testing. ETS also provides all the
design, program management and integration services required to supply customers
with turnkey EMC solutions. Euroshield OY designs and manufactures a broad range
of modular shielding systems and shielded doors, some of which are proprietary,
for the world market. It also provides the design, program management and
integration services to supply the European market with turnkey EMC solutions.

     DCSI is a leading manufacturer of two-way power line communication systems
for the utility industry. These systems provide the electric utilities with a
patented communication technology for demand-side management, distribution
automation, and automatic meter reading capabilities, thus improving the
efficiency of power delivery to the consumer of electric energy. In fiscal year
1998, DCSI, through its Puerto Rican subsidiary, received orders in excess of
$50 million from Puerto Rico Electric Power Authority for the first phase of an
automatic meter reading system. Although there is no guaranty of additional
orders, future island-wide implementation of this system is expected to result
in a total project value in excess of $100 million extending over a 5-8 year
time period.

     Rantec designs and manufactures antennas and antenna feeds for wireless
communications applications, including an electronically-scanned antenna used
for control and navigation of air traffic. Rantec has developed and produced a
commercial satellite cross-link antenna for use on the IRIDIUM1 system, a
fully-operational global telephone system. Rantec also produces satellite
antenna systems for use on commercial aircraft for in-flight entertainment, both
audio and video. In addition, Rantec has developed and is currently supplying
antennas for local multi-point distribution system ("LMDS") communications.

     Rantec is currently developing power supplies for use in the
telecommunications market.


___________________________

     1IRIDIUM is a registered trademark and service mark of IRIDIUM LLC.

                                      2



<PAGE>   7


                     OTHER INDUSTRIAL /GOVERNMENT PRODUCTS
                     -------------------------------------

     SEI supplies electronic sorting and material handling equipment to the
United States Postal Service and other customers.

     Rantec designs and manufactures various power supplies, principally for
high resolution computer and avionics displays and other industrial and medical
equipment. In fiscal year 1998, Rantec began deliveries of a miniaturized, high
voltage power supply for the emerging field emissive display market.

     Filtertek, through its Tek Packaging Division, produces special thermoform
packaging for the medical, electronics, commercial and retail markets.

     The Comtrak Division of SEI has applied its expertise in image processing
and target recognition to develop a proprietary video security monitoring system
which should have applications in commercial and industrial security systems.
Currently, Comtrak is working jointly with ADT Security Services, Inc. to field
test this sytem, and initial sales are expected in fiscal year 1999. Comtrak
also has extensive experience in the design and manufacture of location systems.
Comtrak used this technological expertise to develop a vehicle location,
tracking and communications system which will have applications in theft
deterrence, fleet management and messaging communications.


                                DEFENSE PRODUCTS
                                ----------------

     The Company's defense products are described below. Current activity
includes the development of new products as well as production of existing
products and support in the form of spare parts and service.


                              DEFENSE ELECTRONICS
                              -------------------

     Defense electronics equipment is designed and manufactured by SEI and
Rantec. These subsidiaries primarily produce a diverse mix of military equipment
which includes, but is not limited to, the following product lines:

    *    SEI designs and manufactures launching and guidance systems (fire
         support systems) utilizing electro-optic technology for anti-armor
         missiles.  These systems are manufactured in differing configurations
         for installation on a variety of helicopters, armored vehicles and
         light wheeled vehicles.  SEI has also developed the Mission Equipment
         Package ("MEP") for the Bradley Fire Support Team Vehicle ("BFIST"),
         which is used to direct artillery fire, locate enemy targets and
         provide vehicle self-location.  In fiscal year 1997, SEI was awarded a
         contract for the Army's new "STRIKER" system, a program that
         integrates the BFIST MEP and an advanced surveillance sensor package
         on the High-mobility Multi-purpose Wheeled Vehicle ("HUMVEE").  In May
         1998, SEI delivered the first STRIKER system to the U.S. Army.
         STRIKER is expected to have a number of applications in the ground
         forces of the U.S. and its allies.

    *    SEI produces airborne radar systems for ground mapping, weather
         imaging, terrain following and fire control applications. All of these
         products have completed the production phase and are currently being
         upgraded or are in the spares support phase.

    *    SEI also supplies a lightweight Man-portable Surveillance and Target
         Acquisition Radar ("MSTAR") that detects and classifies moving
         personnel, vehicles, low-flying aircraft and artillery round impact.
         MSTAR has multiple applications as a stand-alone radar and as the radar
         component of an integrated sensor suite.

                                      3



<PAGE>   8

  *    Automatic test equipment ("ATE") for ground support of radar and other
       avionics equipment is also produced by SEI. SEI is currently developing a
       High Power Device Test ("HPDT") system which will be a part of the U.S.
       Navy's family of avionics test equipment. In addition, Mobile Electronic
       Test Sets ("METS") that are utilized for testing equipment on high
       performance fighter aircraft and specialized military transport aircraft
       are being upgraded or are in the spares support phase. SEI also provides
       interface adapters and test program software to meet the needs of each
       particular unit under test.

  *    Rantec produces microwave antennas and antenna mounting and positioning
       systems for airborne radar, missile guidance, electronic warfare,
       military air traffic control and communications. Rantec also produces
       power systems for use in electronic warfare and cockpit display
       systems.

                                DEFENSE SYSTEMS
                                ---------------

     SEI supplies light, medium and heavy transportation systems and weapon
subsystems to the armed forces. Currently in production is a multiple-wheeled
trailer with individually-steerable axles for transporting battle tanks and
other large loads (the "M1000"). SEI also supplies high-capacity aircraft cargo
loaders which aid in rapid tactical and strategic deployment. The first
production deliveries of the 60,000 pound capacity Tunner aircraft cargo loader
developed for the U.S. Air Force were made in late fiscal year 1997. In fiscal
year 1998, this loader completed the U.S. Air Force Initial Operational Test and
Evaluation, and 38 loaders have been delivered to date. The total Air Force
requirement for the loader is expected to exceed 300 units, making this loader
an important program at SEI for the foreseeable future. However, although this
is a high-priority Air Force program, there can be no assurance that orders will
be placed to meet this requirement. SEI also produces light and heavy tactical
bridging systems.


MARKETING AND SALES

     The Company's commercial products generally are distributed to OEMs and
aftermarket users through a domestic and foreign network of distributors, sales
representatives and factory salespersons. Utility communication systems are sold
directly to the electric utilities.

     The Company's defense products predominantly are sold directly or
indirectly to the U.S. Government under contracts with the Army, Navy and Air
Force and subcontracts with prime contractors of such entities. Direct and
indirect sales to the U.S. Government accounted for approximately 41%, 44%, and
53% of the Company's total sales in the fiscal years ended September 30, 1998,
1997 and 1996, respectively. The percentage figure for fiscal year 1996 includes
16% attributable to U.S. Government sales of Hazeltine Corporation, a former
subsidiary of ESCO which was sold to GEC-Marconi Electronic Systems Corporation
("GEC-Marconi") in July 1996. See Notes 2 and 11 of the Notes to Consolidated
Financial Statements in the 1998 Annual Report, which Notes are herein
incorporated by reference.

     For its defense products, the Company maintains a domestic field
marketing/sales network with offices located in the Washington, D.C. area and at
several major U.S. Government defense procurement centers. The Washington, D.C.
office carries out legislative activities, and conducts customer liaison
activities with all branches of the U.S. armed services and with foreign
government offices in the Washington, D.C. area. The primary responsibility for
individual products or programs is handled within the product line
organizations, with the field organization providing closely coordinated
assistance.

     International sales accounted for approximately 16%, 18% and 33% of the
Company's total sales in the fiscal years ended September 30, 1998, 1997 and
1996, respectively. The decrease in fiscal year 1998 was primarily due to lower
Far East sales at SEI, partially offset by increased European sales at
Filtertek. The decrease in fiscal year 1997 was primarily due to the divestiture
of Hazeltine and lower

                                      4


<PAGE>   9



Middle East sales at SEI. Hazeltine's international sales in the fiscal year
ended September 30, 1996 amounted to 13% of the Company's total sales. See Notes
2 and 11 of the Notes to Consolidated Financial Statements in the 1998 Annual
Report. The majority of these international sales involve defense products.
Since most of the Company's foreign export sales involve technologically
advanced products, services and expertise, U.S. export control regulations limit
the types of products and services that may be offered and the countries and
governments to which sales may be made. The Department of State issues and
maintains the International Traffic in Arms Regulations pursuant to the Arms
Export Control Act. Pursuant to these regulations, certain products and services
cannot be exported without obtaining a license from the Department of State.
Most of the defense products that the Company sells abroad cannot be sold
without such a license. Consequently, the Company's international sales may be
adversely affected by changes in the U.S. Government's export policy or by any
suspension or revocation of the Company's foreign export control licenses.

     In addition, the Company's international sales are subject to risks
inherent in foreign commerce, including currency fluctuations and devaluations,
the risk of war, changes in foreign governments and their policies, differences
in foreign laws, uncertainties as to enforcement of contract rights, and
difficulties in negotiating and litigating with foreign sovereigns.


GOVERNMENT DEFENSE CONTRACTS

     A portion of the Company's defense contracts with the U.S. Government and
subcontracts with prime contractors of the U.S. Government are firm fixed-price
contracts. Under firm fixed-price contracts, work is performed and paid for at a
fixed amount without adjustment for the actual costs experienced in connection
with the contracts. Therefore, unless the customer actually or constructively
alters or impedes the work performed, all risk of loss due to cost overruns is
borne by the Company. All Government prime contracts and virtually all of the
Company's subcontracts provide that they may be terminated at the convenience of
the Government. Upon such termination, the Company is normally entitled to
receive the purchase price for delivered items, reimbursement for allowable
costs incurred and allocable to the contract (which do not include many ordinary
costs of doing business in a commercial context) and an allowance for profit on
the allowable costs incurred or adjustment for loss if completion of performance
would have resulted in a loss. The Company is also normally entitled to
reimbursement of the cost it incurs to prepare and to negotiate a settlement of
the termination for convenience.

     In addition, the Company's prime and subcontracts provide for termination
for default if the Company fails to perform or breaches a material obligation.
In the event of a termination for default, the customer may have the unilateral
right at any time to require the Company to return unliquidated progress
payments pending final resolution of the propriety of the termination for
default. If the customer purchases the same or similar products from a third
party, the Company may also have to pay the excess, if any, of the cost of
purchasing the substitute items over the contract price in the terminated
contract. A customer, if it has suffered other ascertainable damages as a result
of a sustained default, could demand payment of such damages by the Company.

     The Company incurs significant work-in-progress costs in the performance of
U.S. Government contracts. However, the Company is usually entitled to invoice
the Government for monthly progress payments. The current progress payment rate
is 75%; however, there is no assurance that this rate will not change in the
future. Any reduction in the rate would increase the amount of working capital
required for these contracts. The Government does not recognize interest expense
as an allowable contract expenditure; therefore, a progress payment rate
decrease may have an adverse effect on the Company's cash flow and
profitability.

     The Company's backlog includes firm fixed-price U.S. Government contracts,
development

                                      5

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programs and production programs in their early phases. These programs have
inherently high risks associated with design, first article testing and customer
acceptance. The profitability of such programs cannot be assured, and they could
represent exposure to the Company. In the event of development or production
problems that are not actually or constructively caused by the customer, the
Company would have the responsibility for proposing and providing curative
action with no additional compensation. In the event the customer does not
accept the curative action or the curative action does not succeed, the contract
could be terminated for default.

     In connection with the Company's U.S. Government business, the Company is
also subject to Government investigations of its policies, procedures and
internal controls for compliance with procurement regulations and applicable
laws. The Company may be subject to downward contract price adjustments, refund
obligations or civil and criminal penalties, and suspension or debarment from
Government contracting. It is the Company's policy to cooperate with the
Government in any investigations of which it has knowledge, but the outcome of
any such Government investigations cannot be predicted with certainty.

     As a U.S. Government contractor, the Company faces additional risks,
including dependence on Congressional appropriations and administrative
allotment of funds, changes in Governmental policies which may reflect military
and political developments, substantial time and effort required for design and
development, significant changes in contract scheduling, complexity of designs
and the rapidity with which products become obsolete due to technological
advances, constant necessity for design improvements, intense competition for
available Government business, and difficulty of forecasting costs and schedules
when bidding on developmental and highly sophisticated technical work (possibly
resulting in unforeseen technological difficulties and/or cost overruns).
Foreign sales involve additional risks due to possible changes in economic and
political conditions. See "Marketing and Sales" above.

     As a U.S. Government contractor, the Company's recognition of revenue is
based upon certain accounting policies described in Notes 1(d) and 1(f) of the
Notes to Consolidated Financial Statements in the 1998 Annual Report, which
Notes are herein incorporated by reference. The Company's revenues are impacted
by the timing of the receipt of orders during the year, which may cause
fluctuations in quarterly sales comparisons on a year-to-year basis. The Company
periodically reviews contracts in the ordinary course to ascertain if customer
actions or inactions have caused or will cause increased costs. In the past, the
Company has submitted requests for equitable adjustments ("REAs") and claims
seeking additional compensation, which involved substantial amounts of money.
Currently, the Company has no such REAs or claims outstanding. However, in the
future, to the extent any such REAs and claims are finally resolved for less
than the amounts anticipated, the Company's financial position and operating
results could be adversely affected.


INTELLECTUAL PROPERTY

     The Company owns or has other rights in various forms of intellectual
property (i.e., patents, trademarks, copyrights, mask works and other items).
However, the Company believes that, although in its commercial business certain
patents are significant with respect to certain products, currently its
business, taken as a whole, is not materially dependent on intellectual property
rights. With respect to patents in particular, most of the Company's U.S.
Government contracts authorize it to use U.S. patents owned by others if
necessary in performing such contracts. Corresponding provisions in Government
contracts awarded to other companies make it impossible for the Company to
prevent others from using its patents in most domestic defense work. As the
Company expands its presence in commercial markets, it is placing a greater
emphasis on developing intellectual property and protecting its rights therein.

                                      6


<PAGE>   11


BACKLOG

     The backlog of firm orders was approximately $292.7 million at September
30, 1998 and approximately $225.0 million at September 30, 1997. As of September
30, 1998, it is estimated that: (i) commercial business accounted for
approximately 57% of the firm orders and defense business accounted for
approximately 43%, and (ii) domestic customers accounted for approximately 85%
of the firm orders and foreign customers accounted for approximately 15%. Of the
total backlog of orders at September 30, 1998, approximately 80% (including all
commercial orders) is expected to be completed in the fiscal year ending
September 30, 1999.


PURCHASED COMPONENTS AND RAW MATERIALS

     The Company's products require a wide variety of components and materials.
Although the Company has multiple sources of supply for most of its material
requirements, certain components are supplied by sole-source vendors, and the
Company's ability to perform certain contracts depends on their performance. In
the past, these required raw materials and various purchased components
generally have been available in sufficient quantities.


COMPETITION

     The Company faces intense competition from a large number of firms for
nearly all of its products. Although the Company is a leading supplier in
several of the markets it serves, the Company maintains a relatively small share
of the business in many of the markets in which it participates. Because of the
diversity and specialized nature of the Company's products, it is impossible to
state precisely its competitive position with respect to each of its products.
Substantial efforts are required in order to maintain existing business levels.
In filtration/ fluid flow, EMC test and commercial communications markets,
competition is driven primarily by quality, price, technology and delivery
performance. The principal competitive factors in the defense markets are price,
service, quality, technical expertise and the ability to design and manufacture
products to desired specifications. For most of its defense products and many of
its commercial products, the Company's competitors are larger and have greater
financial resources than the Company. As defense budgets decline, larger prime
contractors may retain work which previously would have been subcontracted.

     Competition in the Company's commercial markets is broadly based, and
global in scope. Individual competitors range in size from annual revenues of
less than $1 million to billion dollar enterprises, such as Pall Corporation, a
major competitor in the filtration/fluid flow market. While the Company's
commercial markets generally enjoy greater growth prospects than the defense
markets, competition can be equally intense, particularly during periods of
economic slowdown.

     The reduced military threat posed by the former Soviet Union and the
continued domestic pressure to balance the Federal budget have led to reductions
in U.S. defense spending for military equipment. These reductions have resulted
in consolidations within the defense industry. In addition, the U.S.
Government's increasing willingness to purchase commercial products where
feasible has introduced new competitors in traditional defense markets. Further,
the U.S. Government's adoption of the Foreign Comparison Test program, wherein
the Government evaluates foreign products as a potential alternative to products
developed by U.S. suppliers, has increased competitive pressures in these
markets. These factors have all contributed to a highly competitive marketplace
for defense products. In the international defense markets, the continuing
decline in business in most areas in which the Company participates together
with the globalization of competition have resulted in a highly competitive
environment. However, the Company's strategy of forming alliances with several
foreign companies should result in strengthening

                                      7

<PAGE>   12



the Company's competitive position in these markets as well as domestic markets.
Political factors also enter into foreign sales, including a foreign
government's evaluation of the Company's willingness to subcontract work content
to companies located in the foreign country involved.

     The Company recognizes that domestic and international defense markets may
continue to decline, which would result in even stronger competitive pressures.
This trend could adversely affect the Company's future results unless offset by
greater foreign sales or new programs or products. The Company's on-going
commercial diversification program should allow the Company to continue to
reduce its dependence on its defense business and may alleviate some of the
downward pressure on sales from the increased defense market competition.


RESEARCH AND DEVELOPMENT

     Research and development and the Company's technological expertise are
important factors in the Company's business. Research and development programs
are designed to develop technology for new products or to extend or upgrade the
capability of existing products and to assess their commercial potential.

     In addition to its work under development contracts, the Company performs
research and development at its own expense. For the fiscal years ended
September 30,1998, 1997 and 1996, total Company-sponsored research and
development expenses were approximately $5.9 million, $6.2 million and $11.9
million, respectively. Company-sponsored research and development expenses
attributable to Hazeltine were approximately $6.1 million for the fiscal year
ended September 30, 1996. Total customer-sponsored research and development
expenses were approximately $10.2 million, $6.3 million and $3.9 million for the
fiscal years ended September 30, 1998, 1997 and 1996, respectively. Such
customer-sponsored expenses attributable to Hazeltine were approximately $3.9
million for the fiscal year ended September 30, 1996. The increase in fiscal
year 1998 for customer-sponsored research and development expenses was due to
the increased activity at Rantec and Filtertek. The increase in fiscal year 1997
for such research and development expenses was due to the acquisition of
Filtertek and increased activity at Rantec.


ENVIRONMENTAL MATTERS

     The Company is involved in various stages of investigation and cleanup
relating to environmental matters. These matters primarily relate to Company
facilities located in Newbury Park, California and Riverhead, New York. Textron,
Inc. has indemnified the Company in respect of the cleanup expenses at the
Newbury Park facility. In connection with the sale of Hazeltine, the Company
retained ownership of the Riverhead facility (which is currently vacant), and
agreed to indemnify Hazeltine and GEC-Marconi against certain environmental
remediation expenses related to Hazeltine's facility at Quincy, Massachusetts.
The Company is also involved in the remediation of off-site waste disposal
facilities located in Winter Park, Florida and Jackson County, Arkansas, with
regard to both of which the Company is one of a number of potentially
responsible parties, and thus bears a proportionate share of the total
remediation expenses. It is very difficult to estimate the potential costs of
such matters and the possible impact of these costs on the Company at this time
due in part to: the uncertainty regarding the extent of pollution; the
complexity of Government laws and regulations and their interpretations; the
varying costs and effectiveness of alternative cleanup technologies and methods;
the uncertain level of insurance or other types of cost recovery; and in the
case of off-site waste disposal facilities, the uncertain level of the Company's
relative involvement and the possibility of joint and several liability with
other contributors under applicable law. Based on information currently
available, the Company does not believe that the aggregate costs involved in the
resolution of these environmental matters will have a material adverse

                                      8

<PAGE>   13



effect on the Company's financial statements.  See Item 3. "Legal Proceedings".


EMPLOYEES

     As of October 31, 1998, the Company employed approximately 3,550 persons.
Approximately 420 of the Company's employees are covered by a collective
bargaining agreement, which expires in fiscal year 2000.


FINANCING

     The Company has a credit agreement, which has been amended and restated as
of February 7, 1997, and further amended as of May 6, 1997, November 21, 1997
and June 29, 1998, for a $59 million term loan, amortizing at $2 million per
quarter through maturity, and a $73 million revolving credit facility (together
the "Credit Facilities") with a group of seven banks agented by Morgan Guaranty
Trust Company of New York. The Credit Facilities will mature and expire on
September 30, 2000, and contain customary events of default, including change in
control of the Company. In addition, under the Credit Facilities an event of
default would occur if, for any reason other than payment or performance in
accordance with the terms of one of the Company's contracts guaranteed by
Emerson as referenced in the following section, Emerson shall cease to be liable
under its guarantees with respect to any such contract. See "History Of The
Business" below, "Management's Discussion and Analysis--Capital Resources and
Liquidity" in the 1998 Annual Report, and Notes 7 and 12 of the Notes to
Consolidated Financial Statements in the 1998 Annual Report, which Notes are
herein incorporated by reference.


HISTORY OF THE BUSINESS

     ESCO was incorporated in Missouri in August 1990 as a wholly-owned
subsidiary of Emerson Electric Co. ("Emerson") to be the holding company for
Electronics & Space Corp. ("E&S"), Hazeltine, Southwest Mobile Systems
Corporation ("Southwest"), Rantec, VACCO and DCSI, which were then Emerson
subsidiaries. Ownership of ESCO and its subsidiaries was distributed on October
19, 1990 (the "Distribution Date") by Emerson to its shareholders through a
special distribution (the "Distribution"). On September 30, 1992, ESCO acquired
ownership of Textron Filtration Systems, Inc. from Textron, Inc. and renamed the
entity "PTI Technologies Inc." On March 12, 1993, ESCO acquired The
Electro-Mechanics Company, a privately held company, from its shareholders. On
December 1, 1993, ESCO acquired all outstanding stock of Schumacher Filters
Limited (located in England) from Kraftanlagen, AG of Germany, and renamed this
entity "PTI Technologies Limited". On December 29, 1994, ESCO acquired the
assets of Ray Proof North America, a division of Shielding Systems Corporation,
a subsidiary of Bairnco Corporation.

     Effective September 30, 1995, E&S was merged into Southwest. Subsequently,
the latter entity's name was changed to Systems & Electronics Inc.

     Effective October 19, 1995, the assets of EMCO, the assets acquired from
Ray Proof North America, and the assets comprising Rantec's California and
Oklahoma radio/frequency anechoics business were transferred to a newly-formed
Texas limited partnership, EMC Test Systems, L.P. ("ETS"). The sole general
partner of ETS is Rantec Commercial, Inc., a wholly-owned subsidiary of Rantec.
The sole limited partner of ETS is Rantec Holdings, Inc., a wholly-owned
subsidiary of Defense Holding Corp.

     On July 22, 1996, ESCO sold 100% of the capital stock of Hazeltine to
GEC-Marconi. On February 7, 1997, ESCO acquired the filtration products and the
thermoform packaging businesses ("Filtertek") of

                                      9

<PAGE>   14



Schawk, Inc. On December 31, 1997, ESCO acquired the stock of Euroshield OY
(located in Finland), and on July 1, 1998, ESCO acquired the stock of Advanced
Membrane Technology, Inc. and renamed it "PTI Advanced Filtration Inc." See Note
2 of the Notes to Consolidated Financial Statements in the 1998 Annual Report.

     By means of the Distribution, Emerson distributed one share of ESCO's
common stock, par value $0.01 per share (the "Common Stock"), for every 20
shares of Emerson common stock owned on October 5, 1990. Pursuant to a Deposit
and Trust Agreement (the "Deposit and Trust Agreement") by and among Emerson,
ESCO and Boatmen's Trust Company, as voting trustee, in lieu of receiving a
share of Common Stock on the Distribution Date, each Emerson shareholder
received a Common Stock trust receipt (a "Receipt") representing the Common
Stock and its associated preferred stock purchase rights.

     In connection with the Distribution, Emerson, ESCO and ESCO's subsidiaries
entered into various agreements which deal with, among other things, Emerson's
guarantee of certain contracts of ESCO's subsidiaries existing at September 30,
1990 pursuant to which ESCO paid Emerson a guarantee fee of $7.4 million per
year during the subsequent five (5) year period, which ended September 30, 1995
(as of September 30, 1998, the aggregate backlog of firm orders received by the
Company was approximately $292.7 million which included guaranteed contracts
totaling approximately $1.6 million, and there were open letters of credit with
an aggregate value of approximately $2.4 million related to foreign advance
payments in support of various contracts guaranteed by Emerson). See Note 12 of
the Notes to Consolidated Financial Statements in the 1998 Annual Report. Copies
of certain of these agreements, as well as the Deposit and Trust Agreement, are
incorporated by reference as exhibits to this Form 10-K.

     Pursuant to the Deposit and Trust Agreement, if ESCO should fail in certain
circumstances to collateralize its obligation to indemnify Emerson with respect
to contracts that are directly or indirectly guaranteed by Emerson, Emerson
would have the right to direct the voting of the ESCO Common Stock represented
by the Receipts with respect to the election of directors (including changing
the size of the Board or removing directors and filling any vacancies). Emerson
has the right to require ESCO to provide collateral upon: (A) the occurrence of
certain events relating to such guaranteed contracts, including defaults; (B)
ESCO's failure to provide certain information, notices or consultation to
Emerson or to maintain certain financial ratios and covenants; (C) the
acquisition of beneficial ownership of 20% or more of the voting power of ESCO's
outstanding capital stock by any person or group; or (D) the divestiture by ESCO
of any business or assets which would constitute a significant subsidiary under
Regulation S-X of the Commission without the consent of Emerson. If Emerson
requires such collateral, it is uncertain whether ESCO would be able to provide
it in light of, among other things, the amount of collateral which would be
required to secure its obligations under the guaranteed contracts, which
obligations may continue even after completion of the contracts, and
restrictions in its financing arrangements unless a waiver is obtained from its
lenders. See "Financing" above and Note 8 of the Notes to Consolidated Financial
Statements in the 1998 Annual Report, which Note is herein incorporated by
reference.

     Effective September 30, 1993, ESCO's Board of Directors authorized an
accounting readjustment of the Company's balance sheet in accordance with the
accounting provisions applicable to a "quasi-reorganization," an elective
accounting procedure intended to restate assets and liabilities to fair values
and to eliminate any accumulated deficit in retained earnings. See Note 1(b) of
the Notes to Consolidated Financial Statements in the 1998 Annual Report, which
Note is herein incorporated by reference.


FORWARD-LOOKING INFORMATION

     The statements contained in this Item 1. "Business" and in Item 7.
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" concerning the Company's future revenues, profitability, financial
resources, utilization of net deferred tax assets, costs of Year 2000
compliance,

                                      10


<PAGE>   15



product mix, production and deliveries, market demand, product development,
competitive position and statements containing phrases such as "believes",
"anticipates", "may", "could", "should", and "is expected to" are
forward-looking statements made pursuant to the safe harbor provisions of the
Private Securities Litigation Reform Act of 1995. The Company's actual results
in the future may differ materially from those projected in the forward-looking
statements due to risks and uncertainties that exist in the Company's operations
and business environment including, but not limited to: changing priorities or
reductions in the U.S. and worldwide defense budgets; termination of government
contracts due to unilateral government action; the Company's failure to perform
commercial or government contracts; delivery delays or defaults by customers;
performance issues with key suppliers and subcontractors; the Company's
successful execution of internal operating plans; and collective bargaining
labor disputes.


ITEM 2. PROPERTIES

     The Company's principal buildings contain approximately 1,951,600 square
feet of floor space. Approximately 1,585,800 square feet are owned by the
Company and approximately 365,800 square feet are leased. Substantially all of
the Company's owned properties are encumbered in connection with the Company's
Credit Facilities. See Item 1. "Business--Financing" and Note 7 of the Notes to
Consolidated Financial Statements in the 1998 Annual Report. The principal
plants and offices are as follows:



<TABLE>
<CAPTION>
                          SIZE            SQ. FT.           PRINCIPAL USE
       LOCATION         (SQ. FT.)      OWNED/LEASED       (INDUSTRY SEGMENT)
       --------         ---------      ------------        ----------------
<S>                      <C>              <C>             <C>
West Plains, MO          395,300          Owned           Manufacturing
                                                          (Defense and Commercial)

St. Louis, MO            260,500          Owned           Management and Engineering
                                                          (Defense and Commercial)

Sanford, FL              172,200          Owned           Manufacturing (Defense and
                                                          Commercial)

Newbury Park, CA         144,600          Leased          Management, Engineering and
                                                          Manufacturing (Defense and
                                                          Commercial)

Huntley, IL              127,000          Owned           Manufacturing (Commercial)

Patillas, PR             110,000          Owned           Manufacturing (Commercial)

Durant, OK               100,000          Owned           Manufacturing (Commercial)

Hebron, IL                99,800          Owned           Management, Engineering and
                                                          Manufacturing (Commercial)

South El Monte, CA        80,800          Owned           Management, Engineering and
                                                          Manufacturing (Defense and
                                                          Commercial)

Calabasas, CA             61,700          Owned           Management, Engineering and
                                                          Manufacturing (Defense and
</TABLE>


                                      11

<PAGE>   16


<TABLE>
<S>                      <C>              <C>             <C>
                                                          Commercial)

Stockton, CA             55,000           Leased          Manufacturing (Commercial)

Austin, TX               50,000           Leased          Management, Engineering and
                                                          Manufacturing (Commercial)

Los Osos, CA             40,000           Owned           Engineering and Manufacturing
                                                          (Defense and Commercial)

San Diego, CA            38,000           Leased          Management, Engineering and
                                                          Manufacturing (Commercial)

Newcastle West,          37,000           Owned           Manufacturing (Commercial)
Ireland

St. Louis, MO            35,000           Owned           Management, Engineering and
                                                          Manufacturing (Commercial)

Juarez, Mexico           34,400           Leased          Manufacturing (Defense and
                                                          Commercial)

Sheffield, England       33,500           Owned           Management, Manufacturing and
                                                          Distributor (Commercial)

Plailly, France          33,000           Owned           Manufacturing (Commercial)

Sao Paulo, Brazil        22,000           Leased          Manufacturing (Commercial)

St. Louis, MO            21,800           Leased          ESCO Headquarters (Defense and
                                                          Commercial)
</TABLE>


     The Company believes its buildings, machinery and equipment have been
generally well maintained, are in good operating condition and are adequate for
the Company's current production requirements.


ITEM 3. LEGAL PROCEEDINGS

     In August 1994, a class action lawsuit was filed by Ronald and Angela Aprea
and other persons against Hazeltine in the Supreme Court of the State of New
York, Suffolk County, alleging personal injury and property damage caused by
Hazeltine's purported releases of hazardous materials at Hazeltine's facility at
Greenlawn, New York. In connection with the sale of Hazeltine, the Company
indemnified Hazeltine and GEC-Marconi against expenses and potential liability
related to this suit. The suit seeks compensatory and punitive damages, and an
order enjoining Hazeltine from discharging further hazardous materials and for
Hazeltine to remediate all damage to the property of the plaintiffs. The Company
believes that no one and no property has been injured by any release of
hazardous materials from Hazeltine's facility. In fiscal year 1995, the Court
dismissed two counts of the complaint as a result of Hazeltine's motion to
dismiss, and the plaintiffs filed an amended complaint. The plaintiffs filed a
motion to be certified as a class, and, early in fiscal year 1997, the Court
denied this motion. The plaintiffs appealed, and the state appellate court
affirmed the denial in fiscal year 1998. Based upon current facts, the Company
is not able to estimate the probable outcome. Therefore,

                                      12


<PAGE>   17



no provision for this litigation has been made in the consolidated financial
statements in the 1998 Annual Report. Management believes the Company will be
successful in defending this action and that the outcome will not have a
material adverse effect on the Company's financial statements. See Note 13 of
the Notes to Consolidated Financial Statements in the 1998 Annual Report, which
Note is herein incorporated by reference. See also Item 1. "Business--Government
Defense Contracts" and "Business--Environmental Matters".


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     None.


EXECUTIVE OFFICERS OF THE REGISTRANT.

     The following sets forth certain information as of December 13 , 1998 with
respect to ESCO's executive officers. These officers have been elected to terms
which expire at the first meeting of the Board of Directors after the next
annual meeting of stockholders.

     Name              Age              Position(s)
     ----              ---              -----------                        

 Dennis J. Moore *     60      Chairman, President and Chief Executive Officer

 Philip M. Ford        58      Senior Vice President and Chief Financial Officer

 Walter Stark          55      Senior Vice President, Secretary and General
                               Counsel

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

* Also a director and Chairman of the Executive Committee of the Board of
  Directors.

     There are no family relationships among any of the executive officers and
     directors.

     Since October 1992, Mr. Moore has been Chairman, President and Chief
     Executive Officer of ESCO.

     Mr. Ford has been Senior Vice President and Chief Financial Officer of
     ESCO since October 1, 1990.

     Since October 1992, Mr. Stark has been Senior Vice President, Secretary
     and General Counsel of ESCO.


                                    PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.

     The information required by this item is incorporated herein by reference
to Notes 7 and 8 of the Notes to Consolidated Financial Statements, "Common
Stock Market Prices" and "Shareholders' Summary--Capital Stock Information"
appearing in the 1998 Annual Report. A special cash distribution of $3.00 per
share was paid to Stockholders in September 1996. No other cash dividends have
been declared on the Common Stock underlying the Receipts, and ESCO does not
anticipate, currently or in the foreseeable future, paying cash dividends on the
Common Stock, although it reserves the right to do so to the extent permitted by
applicable law and agreements. ESCO's dividend policy will be reviewed by the
Board of Directors at such future time

                                      13


<PAGE>   18



as may be appropriate in light of relevant factors at that time, based on ESCO's
earnings and financial position and such other business considerations as the
Board deems relevant at that time.


ITEM 6.  SELECTED FINANCIAL DATA

    The information required by this item, with respect to selected financial
data, is incorporated herein by reference to "Five-Year Financial Summary" and
Note 2 of the Notes to Consolidated Financial Statements appearing in the 1998
Annual Report.


ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

     The information required by this item is incorporated herein by reference
to "Management's Discussion and Analysis" appearing in the 1998 Annual Report.


ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     The information required by this item is incorporated herein by reference
to "Management's Discussion and Analysis - Capital Resources and Liquidity"
appearing in the 1998 Annual Report.


ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

     The information required by this item is incorporated herein by reference
to the Consolidated Financial Statements of the Company on pages 19 through 36
and the report thereon of KPMG Peat Marwick LLP, independent certified public
accountants, appearing on page 37 of the 1998 Annual Report.


ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

     None.


                                    PART III

ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Information regarding nominees and directors appearing under "Nominees and
Continuing Directors" in ESCO's Notice of the Annual Meeting of the Stockholders
and Proxy Statement dated December 4, 1998 (the "1999 Proxy Statement") is
hereby incorporated by reference. Information regarding executive officers is
set forth in Part I of this Form 10-K.

     Information appearing under "Section 16(a) Beneficial Ownership Reporting
Compliance" in the 1999 Proxy Statement is hereby incorporated by reference.


ITEM  11.  EXECUTIVE COMPENSATION

     Information appearing  under "Board of Directors and Committees" and
"Executive Compensation" (except for the "Report of the Human Resources And
Ethics Committee On Executive Compensation" and

                                      14


<PAGE>   19



the "Performance Graph") in the 1999 Proxy Statement is hereby incorporated by
reference.


ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The information regarding beneficial ownership of Receipts representing
shares of common stock by nominees and directors, by executive officers, by
directors and executive officers as a group and by any five percent stockholders
appearing under "Security Ownership of Management" and "Security Ownership of
Certain Beneficial Owners" in the 1999 Proxy Statement is hereby incorporated by
reference.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     None.


                                    PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

     (a)   Documents filed as a part of this report:

          1. The Consolidated Financial Statements of the Company on pages 19
          through 36 and the Independent Auditors' Report thereon of KPMG Peat
          Marwick LLP appearing on page 37 of the 1998 Annual Report.

          2. Financial statement schedules have been omitted because the subject
          matter is disclosed elsewhere in the financial statements and notes
          thereto, not required or not applicable, or the amounts are not
          sufficient to require submission.

          3.  Exhibits


<TABLE>
<CAPTION>
                                                          Filed Herewith or Incorporated by
    Exhibit                                               Reference to Document Indicated By
    Number                    Description                             Footnote
    ------                    -----------                             --------
<S>             <C>                                           <C>
 2(a)(i)        Stock Purchase Agreement dated as of May      Incorporated by Reference, Exhibit 2
                23, 1996 between ESCO and GEC-Marconi         [1] 

 2(a)(ii)       First Amendment Agreement dated as of July 
                19, 1996 to Stock Purchase Agreement listed   Incorporated by Reference, Exhibit 2
                as Exhibit 2(a)(i) above                      [1]                 

 2(b)(i)        Acquisition Agreement dated December 18,      Incorporated by Reference, Exhibit
                1996 between the Company and Schawk, Inc.     2(a) [2]

 2(b)(ii)       First Amendment dated as of February 6,       Incorporated by Reference, Exhibit
                1998 to Acquisition Agreement listed as       2(b) [2]
                Exhibit 2(b)(i) above                 
</TABLE>

                                      15



<PAGE>   20




<TABLE>
<S>        <C>                                               <C>
                                                             
  3(a)     Restated Articles of Incorporation of ESCO        Incorporated by Reference,    
                                                             Exhibit 3.1 [3]             
  
  3(b)     Bylaws of ESCO, as amended                        Incorporated by Reference,  
                                                             Exhibit 3(b) [4]            

  4(a)     Specimen certificate for ESCO's Common Stock      Incorporated by Reference,                             
           Trust Receipts                                    Exhibit 4(a) [5]            
                                                              
  4(b)     Rights Agreement dated as of September 24,        Incorporated by Reference,
           1990 between ESCO and Boatmen's Trust             Exhibit 4.2 [3]
           Company, as
                                                  

4(c)(i)    Rights Agent Credit Agreement dated as of         Incorporated by Reference,
           September 23, 1990 (as amended and restated       Exhibit 4 [2]
           as of December 30, 1992, amended as of January 
           15, 1993, October 15, 1993 and November 29, 
           1993, amended and restated as of May 27, 1994, 
           amended as of August 5, 1994, amended and restated 
           as of September 29, 1995, amended as of June 6, 
           1996 and August 2, 1996, and amended and 
           restated as of February 7, 1997) among ESCO, 
           Defense Holding Corp., the Banks listed therein 
           and Morgan Guaranty Trust Company of New York, 
           as Agent                                        
                                             
4(c)(ii)   Amendment dated as of May 6, 1997 to Credit       Incorporated by Reference, Exhibit
           Agreement listed as Exhibit 4(c)(i) above         4(c)(ii)[6]

4(c)(iii)  Amendment dated as of November 21, 1997 to        Incorporated by Reference, Exhibit
           Credit Agreement listed as Exhibit 4(c)(i)        4(c)(iii)[6]                      
           above                                             

4(c)(iv)   Amendment dated as of June 29, 1998 to            Incorporated by Reference, Exhibit
           Credit Agreement listed as Exhibit 4(c)(i)        4[7]                              
           above                                             

           No other long-term debt instruments are filed     
           since the total amount of securities authorized   
           under any such instrument does not exceed ten 
           percent of the total assets of ESCO and its 
           subsidiaries on a consolidated basis. ESCO 
           agrees to furnish a copy of such instruments to
           the Securities and Exchange Commission upon       
           request.                                          
</TABLE>
                      
                                      16



<PAGE>   21




<TABLE>
<S>        <C>                                        <C>
  4(d)    Deposit and Trust Agreement dated as of     Incorporated by Reference,
          September 24, 1990 among ESCO, Emerson      Exhibit 4.3 [3]           
          Electric Co., Boatmen's Trust Company,                               
          as Trustee, and the holders of Receipts                              
          from time to time

  10(a)   Distribution Agreement dated as of          Incorporated by Reference,
          September 24, 1990 by and among ESCO,       Exhibit 2.1 [3]
          Emerson Electric Co., and ESCO's direct                              
          and indirect subsidiaries                  
 
 10(b)    Tax Agreement dated as of September 24,     Incorporated by Reference,
          1990 by and among ESCO, Emerson Electric    Exhibit 2.2 [3]           
          Co., and ESCO's direct and indirect         
          subsidiaries                                
                                                      
10(c)(i)  1990 Stock Option Plan*                     Incorporated by Reference,                
                                                      Exhibit 10.3 [3]

10(c)(ii) Amendment to 1990 Stock Option Plan         Incorporated by Reference,    
          dated as of September 4, 1996*              Exhibit 10(c)(ii) [8]          
                                                 
  10(d)   Form of Incentive Stock Option Agreement*   Incorporated by Reference,     
                                                      Exhibit 10(g) [5]              

  10(e)   Form of Incentive Stock Option Agreement    Incorporated by Reference,     
          - Alternative*                              Exhibit 10(h) [5]              

  10(f)   Form of Non-Qualified Stock Option          Incorporated by Reference,     
          Agreement*                                  Exhibit 10(i) [5]              
                                                      
  10(g)   Form of Split Dollar Agreement*             Incorporated by Reference,     
                                                      Exhibit 10(j) [4]
                                             
  10(h)   Form of Indemnification Agreement with      Incorporated by Reference,     
          each of ESCO's directors.                   Exhibit 10(k) [4] 

  10(i)   Stock Purchase Agreement dated as of        Incorporated by Reference,
          August 20, 1992 by and between Textron,     Exhibit 10(l) [9]      
          Inc. and ESCO
                                                                            
                                                      
10(j)(i)  1993 Performance Share Plan*                Incorporated by Reference [10] 

10(j)(ii) Amendment to 1993 Performance Share         Incorporated by Reference,     
          Plan dated as of September 4, 1996*         Exhibit 10(j)(ii) [8]          
      
  10(k)   Supplemental Executive Retirement Plan      Incorporated by Reference,                                
          as amended and restated as of August 2,     Exhibit 10(n) [11]             
          1993* 

 10(l)(i) Directors' Extended Compensation Plan*      Incorporated by Reference,     
                                                      Exhibit 10(o) [11]                       
  
10(l)(ii) Compensatory Arrangement with former        Incorporated by Reference,     
          ESCO director*                              Exhibit 10(l)(ii) [8]                                                      

10(m)(i)  1994 Stock Option Plan*                     Incorporated by Reference [12]                                             
</TABLE>                                                        

                                      17
<PAGE>   22




<TABLE>
<S>        <C>                                        <C>
           
10(m)(ii)  Amendment to 1994 Stock Option Plan        Incorporated by Reference,           
           dated as of September 4, 1996*             Exhibit 10(m)(ii) [8]                
                                                 
  10(n)    Form of Incentive Stock Option Agreement*  Incorporated by Reference,            
                                                      Exhibit 10(n) [13]

  10(o)    Form of Non-Qualified Stock Option         Incorporated by Reference,                                      
           Agreement*                                 Exhibit 10(o) [13]                                      
                                                                                                  
  10(p)    Severance Plan*                            Incorporated by Reference,                                             
                                                      Exhibit 10(p)[13]                           
                                                                                                  
  10(q)    Performance Compensation Plan dated as     Incorporated by Reference,                                               
           of August 2, 1993 (as amended and          Exhibit 10(q) [8] 
           restated as of October 1, 1995)*

  10(r)    1997 Performance Share Plan*               Incorporated by Reference [14]                             
                                                                                                   
  10(s)    Notice Of Award--stock award to            Incorporated by Reference, Exhibit              
           executive officer*                         10(s)[6]                                              
                                                                                                  
  10(t)    Notice of Award--stock award to executive  Incorporated by Reference,           
           officer*                                   Exhibit 10(a)[7]                                  
                                                                       
  10(u)    Notice of Award--stock award to executive  Incorporated by Reference,                            
           officer*                                   Exhibit 10(b)[7]                            

    13     The following-listed sections of the                                                        
           Annual Report to Stockholders for the                                     
           year ended September 30, 1998:                                            
               Five-Year Financial Summary (p. 38)                              
               Management's Discussion and Analysis                                            
                (pgs. 12-18)                                                                    
               Consolidated Financial Statements (pgs.                                         
                19-36) and Independent Auditors' Report                                         
                (p. 37)                                                                         
               Shareholders' Summary--Capital Stock                                            
                Information (p. 39)                                                             
               Common Stock Market Prices (p. 38)                                              

   21       Subsidiaries of ESCO                                                            

   23       Independent Auditors' Consent                                                   

   27       Financial Data Schedule                                                         
</TABLE>           

    [1] Incorporated by reference to Current Report on Form 8-K--date of
    earliest event reported: July 22, 1996, at the Exhibit indicated

                                      18



<PAGE>   23


    [2] Incorporated by reference to Form 10-Q for the fiscal quarter ended
    December 31, 1996, at the Exhibit indicated

    [3] Incorporated by reference to Registration Statement on Form 10, as
    amended on Form 8 filed September 27, l990, at the Exhibit indicated

    [4] Incorporated by reference to Form l0-K for the fiscal year ended
    September 30, l991, at the Exhibit indicated

    [5] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1990, at the Exhibit indicated

    [6] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1997, at the Exhibit indicated.

    [7] Incorporated by reference to Form 10-Q for the fiscal quarter ended June
    30, 1998, at the Exhibit indicated.

    [8] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1996, at the Exhibit indicated.

    [9] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1992, at the Exhibit indicated

    [10] Incorporated by reference to Notice of the Annual Meeting of the
    Stockholders and Proxy Statement dated December 9, 1992

    [11] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1993, at the Exhibit indicated

    [12] Incorporated by reference to Notice of the Annual Meeting of the
    Stockholders and Proxy Statement dated December 8, 1994

    [13] Incorporated by reference to Form 10-K for the fiscal year ended
    September 30, 1995, at the Exhibit indicted

    [14] Incorporated by reference to Notice of the Annual Meeting of the
    Stockholders and Proxy Statement dated December 6, 1996.

    * Represents a management contract or compensatory plan or arrangement
    required to be filed as an exhibit to this Form 10-K pursuant to Item 14(c)
    of this Part IV.


     (b) No report on Form 8-K was filed during the quarter ended September 30,
         1998.

     (c) Exhibits: Reference is made to the list of exhibits in this Part IV,
         Item 14(a)3 above.

     (d) Financial Statement Schedules: Reference is made to Part IV, Item
         14(a)2 above.

                                      19




<PAGE>   24


                                   SIGNATURES


     Pursuant to the requirements of Section 13 or 15(D) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                   ESCO ELECTRONICS CORPORATION


                                   By (s) D. J. Moore
                                     -----------------------------------------
                                          D.J. Moore
                                          Chairman, President and
                                          Chief Executive Officer


Dated: December 18, 1998


     Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below effective December 18, 1998, by the following
persons on behalf of the registrant and in the capacities indicated.

     SIGNATURE                            TITLE


     (s) D. J. Moore                      
     ---------------------------------    Chairman, President, Chief    
     D.J. Moore                           Executive Officer and Director
                                          

     (s) P. M. Ford 
     ---------------------------------    Senior Vice President and Chief
     P.M. Ford                            Financial Officer (Principa
                                          Accounting Officer)

     (s) J. J. Adorjan 
     ---------------------------------    Director
     J.J. Adorjan


     (s) W. S. Antle III 
     ---------------------------------    Director
     W.S. Antle III


     (s) J. J. Carey 
     ---------------------------------    Director
     J.J. Carey


     (s) J.M. McConnell 
     ---------------------------------    Director
     J.M. McConnell


     (s) D. C. Trauscht 
     ---------------------------------    Director
     D.C. Trauscht

                                      20



<PAGE>   25


                               INDEX TO EXHIBITS


Exhibits are listed by numbers corresponding to the Exhibit Table of Item 601 in
Regulation S-K.

Exhibit No.    Exhibit
- -----------    -------

13             The following-listed sections of the Annual Report to 
               Stockholders for the year ended September 30, 1998:

                         Five-year Financial Summary (p. 38)
                         Management's Discussion and Analysis (pgs. 12-18)
                         Consolidated Financial Statements (pgs. 19-36) and 
                         Independent Auditors' Report (p. 37)
                         Shareholders' Summary--Capital Stock Information 
                         (p. 39)
                         Common Stock Market Prices (p. 38)

21             Subsidiaries of ESCO

23             Independent Auditors' Consent

27             Financial Data Schedule



See Item 14(a)3 for a list of exhibits incorporated by reference

                                      21





<PAGE>   1
                                                                     EXHIBIT 13

FIVE-YEAR FINANCIAL SUMMARY 

<TABLE>
<CAPTION>
(Dollars in millions, except per share amounts)             1998(1)         1997(2)         1996(3)          1995(4)           1994 
- ------------------------------------------------------------------------------------------------------------------------------------
            For years ended September 30:
<S>                                                         <C>             <C>            <C>             <C>             <C>   
               Net sales                                     $365.1           378.5          438.5           441.0            473.9 
               Interest expense                                 7.7             5.2            4.8             5.5              3.6 
               Earnings (loss) before income taxes             16.3            17.9           14.8            (29.5)           12.7 
               Net earnings (loss)                             11.3            11.8           26.1            (30.3)            8.3 
               Earnings (loss) per share:
                  Basic                                         .94            1.00           2.32            (2.76)            .72 
                  Diluted                                       .90             .96           2.26            (2.76)            .72 

            As of September 30:
               Working capital                                 60.3            62.3           86.2            71.4             86.6 
               Total assets                                   409.3           378.2          307.8           378.0            347.5 
               Long-term debt                                  50.1            50.0           11.4            23.5             25.1 
               Shareholders' equity                           224.1           205.0          191.1           182.3            187.4 
</TABLE>

(1)  Includes the acquisitions of Euroshield (December 31, 1997) and PTA (July
     1, 1998) (see Footnote 2 of Notes to Consolidated Financial Statements).

(2)  Includes the acquisition of Filtertek in February 1997 (see Footnote 2 of
     Notes to Consolidated Financial Statements).

(3)  Includes the sale of Hazeltine; $25.3 million of other charges related to
     cost of sales; and includes an adjustment to the income tax valuation
     reserve (see Footnotes 2, 6 and 14 of Notes to Consolidated Financial
     Statements).

(4)  Includes $16.5 million of other charges related to cost of sales and a
     change in accounting estimate.

38


<PAGE>   2


MANAGEMENT'S DISCUSSION AND ANALYSIS

                 The following discussion should be read in conjunction with the
            consolidated financial statements and notes thereto.

BUSINESS ENVIRONMENT

                 ESCO  Electronics  Corporation  (ESCO,  the  Company)  operates
            within  two  primary  business   segments:   commercial   (primarily
            filtration/fluid flow and communications/test) and defense.
                 Overall,  1998 was a challenging  yet successful year for ESCO.
            The Company achieved several  significant  accomplishments  in 1998,
            including:
                 -- a 28% increase in entered orders,  led by additional  Tunner
            aircraft   loaders  and  M1000  tank   transporters   at  Systems  &
            Electronics   Inc.  (SEI);  two  orders  totalling  $54  million  at
            Distribution Control Systems,  Inc. (DCSI) to supply automatic meter
            reading and electric utility  communications  systems to Puerto Rico
            Electric   Power   Authority   (PREPA);   and   higher   volume   of
            filtration/fluid flow products at PTI Technologies Inc. (PTI).
                 -- achieving an 8% operating profit margin, as adjusted for the
            $2.5 million  one-time  charge for the settlement of a long-standing
            contractual  dispute with the U.S.  Army on the original  M1000 tank
            trans-porter  program.  The operating  margin  improvement  occurred
            despite a slowdown in some of the Company's  industrial  markets and
            the impact of the General Motors Corporation strike on the Company's
            Filtertek operations.
                 -- the  completion of two commercial  acquisitions,  Euroshield
            OY, a manufacturer  of high-quality  shielding  products used in the
            electromagnetic  compatibility (EMC) industry, and Advanced Membrane
            Technology,  Inc., a manufacturer of filtration membrane and systems
            used in a variety of process industries.
                 -- increasing the commercial sales content to 57% of total re-
            venues.
                 These accomplishments  provide further evidence of management's
            strategy of deliberate diversification and its ongoing commitment to
            create shareholder value.
                 In 1997, the Company significantly strengthened its presence in
            the  fast-growing  and profitable  filtration  industry  through its
            February 1997 acquisition of Filtertek, Inc. (Filtertek). Filtertek,
            in conjunction  with the 1998 commercial  acquisitions  noted above,
            effectively  increased the commercial content of the Company's sales
            to over 50% for the first time in the Company's history.
                 During 1998, the overall defense  industrial base continued its
            consolidation,  and ESCO responded to this competitive  challenge by
            continuing to reposition itself to compete in the global marketplace
            and to apply defense technologies to commercial products. Management
            continues to believe the Company's  strong  product  diversification
            and technology niches in its core defense  businesses will enable it
            to compete effectively in the defense market.
                 New program  opportunities  in both the defense and  commercial
            segments,  in  addition  to  the  ongoing  commercial  acquisitions,
            effectively reposition the Company's business base for the remainder
            of the decade.  This should  allow ESCO to continue to increase  its
            commercial  segment  contributions  while  continuing  to reduce its
            overall dependence on its defense business.
                 ESCO's improved  financial position and strong balance sheet at
            September 30, 1998 should allow the Company to continue its strategy
            of   deliberate   diversification   through   internal  new  product
            development   and   selective   acquisitions,   thereby   increasing
            shareholder value.

RESULTS OF OPERATIONS
            
            1998 COMPARED WITH 1997
                 Net sales of $365.1  million in 1998 were $13.4 million  (3.5%)
            lower than net sales of $378.5  million in 1997.  The  decrease  was
            primarily the result of lower sales of Tunner  aircraft  loaders and
            material  handling  equipment  for the U.S.  Postal  Service  at SEI
            resulting from the timing of the receipt of orders. The 1998 portion
            of the  multi-year  Tunner  contract  was awarded in the fiscal 1998
            fourth quarter. The 1998 sales


                                        12

<PAGE>   3


             decrease  was  partially  offset  by sales  increases  at all other
            operating  units.  The largest  increases  in 1998 were  recorded at
            Filtertek  ($24.8 million) and PTI ($11 million).  Filtertek's  1997
            sales  of  $48.6   million  were  for  eight  months  of  operations
            subsequent to the February 1997 acquisition.
                 In 1998,  commercial  sales were  $206.1  million  (56.5%)  and
            defense  sales  were  $159.0  million  (43.5%)  compared  with  1997
            commercial  and  defense  sales of $187.5  million  (49.5%) and $191
            million (50.5%), respectively. The increase in 1998 commercial sales
            is primarily attributable to the inclusion of Filtertek for the full
            year and additional volume at PTI and DCSI.
                 The  Company  is  involved  in  the  design,   development  and
            manufacture of products for the commercial and defense markets.  The
            Company  generally  manufactures  products only upon receipt of firm
            customer  orders and delivers the  products in  accordance  with the
            customer's schedule. As a result, the Company's beginning backlog of
            firm orders,  the level of orders  received  during the year and the
            mix of products to be produced all influence the Company's operating
            results.
                 Firm order  backlog was $292.7  million at September  30, 1998,
            compared to $225  million at  September  30,  1997.  The increase in
            backlog  reflects the timing of receipt of orders and their  related
            sales throughout the various  programs' life cycles,  principally at
            SEI  and  DCSI.  As  ESCO   continues  its   transition   towards  a
            predominantly  commercial company,  backlog plays a less significant
            role as  commercial  products tend to be ordered by the customer and
            shipped by the Company  within the same fiscal  year.  Approximately
            20% of the  September  30, 1998  backlog is expected to be delivered
            beyond one year.
                 Orders  aggregating  $432.7  million  were  received  in  1998,
            compared  with  $338.7  million  in 1997  reflecting  a $94  million
            (27.8%)  increase.  The largest increases in orders during 1998 were
            recorded at DCSI  (PREPA),  SEI (Tunner)  and PTI  (filtration/fluid
            flow),  partially  offset by  decreased  orders at Rantec.  The most
            significant orders in 1998 were for filtration/fluid  flow products;
            Tunner  aircraft  loaders;   electric  utility   communications  and
            automatic  meter  reading  systems;   M1000  tank  transporters  and
            airborne radar systems.
                 The Company  computes gross profit as: net sales,  less cost of
            sales, less other charges related to cost of sales. The gross profit
            margin is the gross profit  divided  into net sales,  expressed as a
            percentage.
                 The gross profit margin in 1998 was 26.1%  compared to 24.2% in
            1997.  The  improvement  in 1998 gross  margin  compared to the 1997
            gross margin is the result of a more favorable  sales mix.  Although
            higher,  the 1998 gross  margin was  adversely  affected by the $2.5
            million claim settlement noted below, the General Motors Corporation
            strike  and  Hurricane   Georges,   which   impacted   Filtertek  in
            particular,  and a  slowdown  in  some of the  Company's  industrial
            markets. The 1997 gross margin was negatively impacted by the higher
            volume of Tunner sales at SEI which were recorded at break-even. The
            gross  profit  margin  attributable  to the  commercial  segment was
            consistent in both periods presented.
                 Other charges  related to cost of sales of $2.5 million in 1998
            resulted from the Company's  settlement of a long-standing  contract
            dispute related to the original M1000 tank transporter  program. The
            settlement  agreement  requires the customer to pay the Company $7.5
            million in 1999, in exchange for the Company  dropping its claim for
            damages and recovery of additional program costs incurred. All units
            related  to  the  original   contract  have  been  delivered.   This
            settlement  allows  the  Company  to avoid a lengthy  and  expensive
            lawsuit against one of its largest  customers,  the U.S. Army. After
            considering  all factors,  management  determined  that settling the
            dispute was in the Company's long-term best interest.
                 Selling,  general and  administrative  expenses (SG&A) for 1998
            were  $68.3  million,  or 18.7% of net  sales,  compared  with $64.1
            million,  or 16.9% of net sales,  for 1997.  The 1998 SG&A  expenses
            included $4.6 million of additional expense at Filtertek as a result
            of it being included in 1998 for the entire year versus eight months
            of 1997.  The  percentage  increase  in 1998 is the  result of lower
            sales at SEI available to cover certain fixed costs.
                 Interest  expense  increased  to $7.7 million in 1998 from $5.2
            million in 1997, primarily as a result of higher average outstanding
            borrowings  throughout 1998. A significant amount of the outstanding
            borrowings in 1998 was incurred  with the February 1997  acquisition
            of Filtertek.  The timing of operating  cash flows  throughout  1998
            also increased the average outstanding borrowings.


                                        13

<PAGE>   4


                 Other  costs  and  expenses,  net,  decreased  in  1998 to $2.9
            million from $4.5 million in 1997,  primarily due to PTI receiving a
            $1.6   million   lease   surrender   payment   (recorded   as  other
            miscellaneous  income)  from its landlord for agreeing to vacate its
            current  manufacturing  facility in Newbury  Park,  California.  The
            agreement required the landlord to pay PTI $1.6 million  immediately
            upon signing the agreement and to pay an additional  $2.9 million on
            December 31, 2000, or earlier,  upon PTI vacating the property.  PTI
            is evaluating its relocation  alternatives  regarding  leasing other
            appropriate facilities or constructing a new facility. The remainder
            of other costs and  expenses,  net was  consistent  in both  periods
            presented.  This account  reflects all  miscellaneous  non-operating
            costs, including amortization of intangible assets.
                 Income tax expense of $5.1 million for 1998  reflects  deferred
            tax  expense  of $6.1  million  and  foreign,  state  and  local tax
            benefits of ($1)  million.  Income tax  expense of $6.1  million for
            1997 reflects  current Federal tax expense of $.2 million,  deferred
            tax expense of $4.8 million and foreign, state and local taxes of $1
            million.
                 Based on the Company's  historical pretax income,  adjusted for
            significant  nonrecurring items such as the facilities consolidation
            program  and other  costs  related to cost of sales,  together  with
            management's  projection  of future  taxable  income  based upon its
            shift in strategic direction,  management believes it is more likely
            than not that the Company will realize a majority of the benefits of
            the net deferred tax asset  existing at September 30, 1998. In order
            to realize the  aforementioned  net  deferred  tax asset the Company
            will need to generate  future taxable income of  approximately  $128
            million,  of which $114 million is required to be realized  prior to
            the  expiration of the net operating  loss (NOL)  carryforwards,  of
            which $33  million  will expire in 2006;  $6 million  will expire in
            2007;  $23 million  will expire in 2009;  $38 million will expire in
            2010; $7 million will expire in 2011;  and $7 million will expire in
            2018. These net operating loss  carryforwards  may be used to reduce
            future income tax cash payments.
                 As a result of the sale of Hazeltine  in 1996,  the Company has
            available   capital   loss   carryforwards   for  tax   purposes  of
            approximately  $77  million.  This  capital  loss  may be  used as a
            reduction of future  capital  gains  recognized  by the Company,  at
            which time the Company  may realize  additional  tax  benefits.  Any
            unused capital loss carryforward will expire in 2001.
                 The Company's  deferred tax valuation  allowance of $41 million
            at September 30, 1998 was comprised of approximately  $13.9 million,
            which  represents  management's  best estimate of the portion of the
            deferred tax asset  associated  with temporary  differences and NOLs
            which  may not be  realized,  and a full  valuation  reserve  in the
            amount of $27.1  million for the portion of the  deferred  tax asset
            represented by the capital loss. There can be no assurance, however,
            that the  Company  will  generate  sufficient  taxable  income  or a
            specified  level  of  continuing  taxable  income  in order to fully
            utilize the deferred tax assets in the future.
                 The effective tax rate in 1998 was 30.9% compared with 33.9% in
            1997. An analysis of the effective tax rates for 1998, 1997 and 1996
            is included in the notes to consolidated financial statements.

            1997 Compared with 1996
                 Net sales of $378.5  million in 1997 were $60  million  (13.7%)
            lower than net sales of $438.5  million in 1996.  The  decrease  was
            primarily  the  result  of the  sale  of  Hazeltine  in  July  1996,
            partially  offset by the  acquisition of Filtertek in February 1997.
            Hazeltine's  sales for the  ten-month  period  of 1996  prior to its
            divestiture  were $94  million,  offset by  Filtertek's  eight-month
            sales of $48.6 million.  Net sales at the remainder of the Company's
            operating units decreased $14.6 million in 1997 compared to 1996 due
            to lower sales volume at SEI, partially offset by increased sales at
            all other  operating  units. In 1997,  commercial  sales were $187.5
            million (49.5%) and defense sales were $191 million (50.5%) compared
            with 1996 commercial and defense sales of $137.6 million (31.4%) and
            $301 million (68.6%),  respectively. The increase in 1997 commercial
            sales was primarily attributable to the acquisition of Filtertek and
            additional  volume at PTI.  Hazeltine's  commercial  sales  were not
            significant in 1996.
                 Firm order  backlog was $225  million at  September  30,  1997,
            compared to $244  million at  September  30,  1996.  The decrease in
            backlog  reflects the timing of receipt of orders and related  sales
            throughout the various  programs'  life cycles,  principally at SEI.
            Order backlog increased $24 million in conjunction with the


                                        14

<PAGE>   5


            February 1997  acquisition of Filtertek.  Approximately  11% of the 
            September  30, 1997 backlog was expected to be delivered  beyond
            one year.
                 Orders  aggregating  $338.7  million  were  received  in  1997,
            compared  with  $296.2  million  in  1996   (excluding   Hazeltine),
            reflecting a $42.5 million (14.3%)  increase.  Orders during 1996 as
            reported including Hazeltine were $373.6 million. Orders received by
            Hazeltine in 1996 prior to its sale were $77.4  million,  and orders
            received by Filtertek  since February 1997 were $47.5  million.  The
            largest increases in orders during 1997 were recorded at PTI, Rantec
            and EMC Test Systems, L.P. (ETS), offset by decreased orders at SEI.
            The most significant orders in 1997 were for  filtration/fluid  flow
            products; M1000 tank transporters;  airborne radar systems; EMC test
            equipment;   integrated  mail  handling  and  sorting  systems;  and
            automatic meter reading equipment.
                 The gross profit margin in 1997 was 24.2%  compared to 10.6% in
            1996.  The lower margin in 1996 was  primarily  attributable  to two
            factors:  a $23 million  adjustment  of the estimate of the costs to
            complete the 60K Loader  program at SEI; and the components of other
            charges related to cost of sales as discussed  below. The 1996 gross
            profit  margin,  if "adjusted" to exclude the 60K Loader  adjustment
            and the  other  charges  related  to cost of sales  would  have been
            21.6%.  The  improvement  in  1997  gross  margin  compared  to  the
            "adjusted" 1996 gross margin is the result of a more favorable sales
            mix at all operating units. The gross profit margin  attributable to
            the commercial segment was consistent in both periods presented.
                 During 1996,  and in connection  with the sale of Hazeltine and
            management's   decision   to  pursue  a   strategy   of   deliberate
            diversification from defense to commercial,  the Company reevaluated
            the  carrying  value  of  certain  assets.   As  a  result  of  this
            reevaluation,  the Company  recorded  $25.3 million of other charges
            related to cost of sales in 1996.  These  strategic  decisions  were
            intended to increase the contributions of the commercial segment and
            to  reduce  the   Company's   overall   dependence  on  the  defense
            businesses.
                 The 1996 charge  included $14.3 million of inventories  related
            to defense  programs which management no longer intended to actively
            pursue;  $6 million of costs  included in other  assets  incurred in
            anticipation of certain defense contract awards  (Precontract Costs)
            which the Company no longer  intended to actively  pursue;  and a $5
            million  adjustment  in the  Company's  estimate of  recoveries in a
            contract dispute related to the M1000 tank transporter program. This
            dispute was subsequently settled in 1998.
                 Selling,  general and  administrative  expenses (SG&A) for 1997
            were  $64.1  million,  or 16.9% of net  sales,  compared  with $70.5
            million,  or 16.1% of net sales,  for 1996.  The 1997 SG&A  expenses
            included $7.2 million for Filtertek and the 1996 SG&A included $12.9
            million for  Hazeltine.  The net decrease in 1997 SG&A  spending was
            the result of successful cost  containment  programs  throughout the
            Company.
                 Interest  expense  increased  to $5.2 million in 1997 from $4.8
            million in 1996, primarily as a result of higher average outstanding
            borrowings  throughout 1997. A significant amount of the outstanding
            borrowings in 1997 was incurred with the acquisition of Filtertek.
                 Other  costs  and  expenses,  net,  decreased  in  1997 to $4.5
            million   from  $5   million  in  1996,   primarily   due  to  lower
            miscellaneous non-operating costs.
                 The 1996 gain on the sale of Hazeltine represented the net gain
            after  deducting  selling costs and expenses and after adjusting for
            certain assets and liabilities retained by ESCO.
                 Income tax expense of $6.1  million for 1997  reflects  current
            Federal tax  expense of $.2  million,  deferred  tax expense of $4.8
            million and foreign, state and local taxes of $1 million. Income tax
            benefit  of $11.4  million  for 1996  reflects  an  increase  in net
            deferred  tax assets of $27.7  million,  of which $15.1  million was
            credited to additional  paid-in  capital.  Foreign,  state and local
            taxes amounted to $1.2 million in 1996.
                 In  1997,  the  Company  reduced  its  deferred  tax  valuation
            allowance by $3.7 million.  The deferred tax valuation  allowance of
            $39.6  million at September 30, 1997  included  approximately  $12.5
            million, which represented management's best estimate of the portion
            of the deferred tax asset associated with temporary  differences and
            NOLs which may not be realized,  and a full valuation reserve in the
            amount of $27.1  million for the portion of the  deferred  tax asset
            represented by the capital loss.


                                        15

<PAGE>   6


                 The effective tax rate in 1997 was 33.9% compared with (77%) in
            1996.  The tax  provision for 1996 was impacted by the effect of the
            Hazeltine  divestiture,  the Corporate  Readjustment  implemented in
            1993 and other  items.  An  analysis of the  effective  tax rates is
            included in the notes to consolidated financial statements.

CAPITAL RESOURCES & LIQUIDITY

                 The Company  has been,  and will  continue  to be,  impacted by
            changes  in the  defense  industry  brought  about  by the  changing
            international   political  environment  and  the  U.S.  Government's
            deficit reduction measures,  including  procurement policies and tax
            reform. This operating  environment  requires defense contractors to
            make  significant  capital  commitments  to  programs  for  extended
            periods of time.  The Company has been  successful  in continuing to
            shift its business from development  programs to production programs
            and on  increasing  the  commercial  content of its  business  base,
            thereby reducing the risk inherent in the defense industry.
                 Net cash  provided by  operating  activities  in 1998 was $20.3
            million  compared  to  $25.3  million  in  1997.  The  1998 net cash
            provided  by  operating  activities  was lower  than 1997 due to the
            increased  operating  working capital  requirements.  The additional
            investment  in  operating  working  capital in 1998 is the result of
            increased  inventories necessary to support near-term production and
            delivery  requirements,  primarily  at SEI  (Tunner).  The 1998 cash
            investment for inventories  was partially  offset by the improvement
            in costs and  estimated  earnings  on  long-term  contracts  and the
            additional receipt of advance payments on long-term contracts.
                 Net cash provided by operating  activities was $25.3 million in
            1997,  compared to $1 million in 1996. The 1997 net cash provided by
            operating  activities  improved compared to 1996, net of the gain on
            the sale of Hazeltine,  primarily due to the positive impact of 1997
            operating earnings.
                 In 1998 and 1997,  capital  expenditures  of $12.9  million and
            $10.5 million,  respectively,  included  manufacturing  equipment at
            Filtertek,  SEI and  PTI.  In  1996,  capital  expenditures  of $8.6
            million  included   capitalized   facility  costs  at  SEI,  process
            equipment at PTI and capital expenditures of $1.5 million related to
            Hazeltine.   There  were  no  commitments   outstanding   that  were
            considered material for capital expenditures at September 30, 1998.
                 At September 30, 1998,  the Company had available net operating
            loss  carryforwards  (NOLs) for tax purposes of  approximately  $114
            million. These NOLs will expire beginning in year 2006 and ending in
            year 2018.  These NOLs will be used to reduce future  Federal income
            tax cash payments.
                 On July 1, 1998,  the  Company  completed  the  acquisition  of
            Advanced Membrane Technology, Inc. (AMT) and renamed the company PTI
            Advanced  Filtration Inc. (PTA).  PTA,  headquartered  in San Diego,
            California,  designs and  manufactures  several  types of filtration
            membrane   and  provides   filtration   systems  for  a  variety  of
            applications in the process industries. The transaction involved the
            purchase of AMT common  stock for  approximately  $7 million in cash
            plus  approximately  450,000  shares of ESCO Common  Stock valued at
            $8.6 million.  The cash portion was financed with the Company's bank
            credit facility.
                 On December 31,  1997,  the Company  completed  the purchase of
            Euroshield OY for consideration which included $3.5 million in cash.
            Euroshield, located in Eura, Finland, designs and manufactures high-
            quality shielding products used in the electromagnetic compatibility
            (EMC) industry.
                 On February 7, 1997, the Company  completed the  acquisition of
            the filtration and the thermoform packaging  businesses  (Filtertek)
            of Schawk, Inc. The transaction  involved the purchase of assets and
            stock of certain  subsidiary  corporations  of Schawk,  Inc. for $92
            million  in cash  plus  working  capital  adjustments  in 1998.  The
            purchase was financed  with cash and  borrowings  from the Company's
            bank credit  facility.  Filtertek is a leader in the  manufacture of
            plastic insert injection molded filter assemblies.
                 The Company's  existing  $132 million bank credit  facility was
            amended on June 29, 1998 to increase  the amount of the  outstanding
            term loan by $7 million to $59 million,  and to reduce the revolving
            credit  facility  by $7  million to $73  million.  The term loan has
            scheduled amortization payments of $2 million per quarter.


                                        16

<PAGE>   7


            The revolving credit facility  (subject to borrowing base asset
            limitations) is available for direct  borrowings and/or the issuance
            of letters of credit.  The  maturity of the bank credit  facility is
            September 30, 2000. These credit  facilities are provided by a group
            of banks,  led by Morgan  Guaranty  Trust  Company  of New York.  At
            September 30, 1998,  the Company had $48.3 million  available  under
            the revolving credit facility.
                 In 1996, the Company authorized an open market share repurchase
            program for up to two million  shares of common  stock over a period
            ended  September  30,  1998.   Approximately   180,000  shares  were
            repurchased throughout that two-year period. Subsequent to September
            30,  1998,  the  Company   authorized  an  additional   open  market
            repurchase program of up to 1.3 million shares,  which is subject to
            market  conditions  and other factors and will cover a period ending
            September 29, 2000.
                 Cash flow from operations and borrowings  under the bank credit
            facility  are  expected to provide  adequate  resources  to meet the
            Company's  capital   requirements  and  operational  needs  for  the
            foreseeable future.
                 All of the Company's debt is priced at a percentage over LIBOR.
            The Company has reduced this risk through a rate swap agreement that
            provides a cap on LIBOR of 7% on $50 million of the  long-term  debt
            through  September  30,  1998,   reducing  to  $40  million  through
            September 30, 1999.  The Company does not have  significant  risk or
            exposure to fluctuations in foreign currencies,  which are hedged in
            part through the purchase of forward currency contracts.
                 Management believes that, for the periods presented,  inflation
            has not had a material effect on the Company's operations.
                 The  Company  is  currently   involved  in  various  stages  of
            investigation,  remediation and litigation relating to environmental
            matters. Based on current information available, management does not
            believe the  aggregate  costs  involved in the  resolution  of these
            matters  will  have a  material  adverse  effect  on  the  Company's
            operating results, capital expenditures or competitive position.

NEW ACCOUNTING PRONOUNCEMENTS

                 In June 1997, the Financial  Accounting  Standards Board (FASB)
            issued Statement of Financial  Accounting  Standards (SFAS) No. 130,
            "Reporting   Comprehensive   Income."  This  Statement   establishes
            standards for the reporting and display of comprehensive  income and
            its  components  in  a  full  set  of  general   purpose   financial
            statements.  All items  that are  required  to be  recognized  under
            accounting  standards as components of comprehensive  income must be
            reported in a financial  statement with the same prominence as other
            financial  statements.  SFAS No. 130 is effective beginning with the
            Company's first fiscal quarter ending December 31, 1998.
                 Also in June 1997,  the FASB issued SFAS No. 131,  "Disclosures
            about  Segments  of an  Enterprise  and Related  Information".  This
            Statement  establishes  standards  for the  manner  in which  public
            business  enterprises report information about operating segments in
            interim and annual financial statements, and the related disclosures
            about products and services,  geographic  areas and major customers.
            The effect of adopting  this  provision  is not  expected to provide
            additional  disclosures  materially  different than those previously
            disclosed  by the  Company,  on an  annual  basis.  SFAS No.  131 is
            effective  beginning with the Company's  first fiscal quarter ending
            December 31, 1998.
                 In February  1998,  the FASB  issued SFAS No. 132,  "Employers'
            Disclosures  about Pensions and Other  Postretirement  Benefits,  an
            amendment of FASB  Statements  No. 87, 88, and 106".  This Statement
            amends the disclosure requirements with respect to pension and other
            postretirement  benefits.  It does  not  change  any of the  current
            guidance on measurement or recognition  related to these areas. SFAS
            No. 132 is effective for the Company's  fiscal year ending September
            30, 1999.
                 In April 1998,  the FASB  issued  Statement  of Position  (SOP)
            98-5, "Reporting on the Costs of Start-up  Activities".  This SOP is
            applicable to all non-governmental entities and provides guidance on
            accounting for start-up activities, including organization costs and
            pre-contract costs. Pre-contract costs were incurred and


                                        17

<PAGE>   8


            capitalized  under  the  existing  guidance  provided  by SOP 81-1,
            "Accounting for Performance of Construction-type  Contracts".  Under
            the current  guidance  of SOP 81-1,  costs  incurred  for a specific
            anticipated  contract  may be  capitalized  if  these  costs  can be
            directly  associated with the specific  anticipated  contract and if
            their recoverability from that contract is probable. SOP 98-5 amends
            and  supersedes  the current  guidance  of SOP 81-1.  The Company is
            required to adopt this change in accounting  principle no later than
            the first  quarter of fiscal year 2000.  This  change in  accounting
            principle  will  result in a non-cash,  after-tax  charge of $15-$25
            million,  which  will be  recognized  as a  cumulative  effect of an
            accounting change. This change will be presented below net earnings.

YEAR 2000 ISSUES

                 The Year  2000  ("Y2K")  issue  refers  to the  inability  of a
            date-sensitive  computer program to recognize a two-digit date field
            designated as "00" as the year 2000.  Mistaking  "00" for 1900 could
            result in a system failure or miscalculations causing disruptions to
            operations,   including  manufacturing,  a  temporary  inability  to
            process  transactions,  send  invoices,  or engage  in other  normal
            business  activities.  This is a significant  issue for most, if not
            all, companies with far-reaching implications,  some of which cannot
            be anticipated or predicted with any degree of certainty.
                 The Company is  currently  assessing  the  magnitude of its Y2K
            issue and has already  determined  that it may be required to modify
            or replace  certain  portions of its  software so that its  computer
            systems will be able to function  properly beyond December 31, 1999.
            This  may  require  certain   hardware  and  software   replacement,
            reprogramming  or  other  remedial  action.   The  Company  is  also
            communicating  with its  suppliers  and  customers to determine  the
            extent  of the  Company's  vulnerability  to the  failure  of  third
            parties to remediate their own Y2K issue.
                 In   conjunction   with  this   assessment,   the   Company  is
            implementing  its action  plans to address the Y2K issue,  including
            contingencies to address unforeseen  problems.  The Company is using
            both internal and external  resources to complete Y2K reprogramming,
            hardware and software  replacement  and testing.  Preliminary  plans
            anticipate  completion  of the Y2K remedial  work by  September  30,
            1999. To date, the Company has incurred  approximately  $2.5 million
            related to the Y2K remedial work. The total cost of the Y2K remedial
            work is estimated to be less than $5 million and, with the exception
            of  certain  capitalizable  hardware  and  software  costs,  will be
            expensed as incurred over the next 12 months.
                 The Company is currently exploring  contingency planning in the
            event that vendors, suppliers, customers or other third parties fail
            to meet Y2K compliance.  At present, the Company does not anticipate
            a material impact internally or externally from Y2K noncompliance.
                 The  expected  costs of the  project  and the date on which the
            Company  plans to  complete  the Y2K  remediation  work are based on
            management's  best  estimates,  which  were  derived  from  numerous
            assumptions  about future  events,  including  the  availability  of
            certain  resources,   third-party   modification  plans,  and  other
            factors.  However,  there can be no guarantee  that these  estimates
            will be achieved and actual  results  could differ  materially  from
            those plans.  Specific factors that might cause material differences
            include,  but are not  limited  to,  the  availability  and  cost of
            personnel  trained  in this area and the  ability  to  identify  and
            correct all relevant computer codes.

                                        18

<PAGE>   9
ESCO Electronics Corporation and Subsidiaries

- -------------------------------------------------------------------------------
CONSOLIDATED STATEMENTS OF OPERATIONS
- -------------------------------------------------------------------------------





<TABLE>
<CAPTION>

Years ended September 30,
<S>                                              <C>        <C>         <C>  
(Dollars in thousands, except per share amounts)     1998      1997        1996
- -------------------------------------------------------------------------------

Net sales                                        $365,083   378,524     438,543

Costs and expenses:
   Cost of sales                                  267,332   286,790     366,719
   Other charges related to cost of sales           2,500        --      25,300
   Selling, general and administrative expenses    68,326    64,142      70,464
   Interest expense                                 7,703     5,220       4,781
   Other, net                                       2,875     4,522       5,017
   Gain on sale of Hazeltine                           --        --     (48,500)
                                                  -------   -------    --------
      Total costs and expenses                    348,736   360,674     423,781
                                                  -------   -------    --------

Earnings before income tax                         16,347    17,850      14,762

Income tax expense (benefit)                        5,051     6,053     (11,374)
                                                  -------   -------    --------
      Net earnings                               $ 11,296    11,797      26,136
- -------------------------------------------------------------------------------


Earnings per share:
   Basic                                         $    .94      1.00        2.32
   Diluted                                       $    .90       .96        2.26
- -------------------------------------------------------------------------------
</TABLE>

                                        19
<PAGE>   10
ESCO Electronics Corporation and Subsidiaries

- -------------------------------------------------------------------------------
CONSOLIDATED BALANCE SHEETS
- -------------------------------------------------------------------------------




<TABLE>
<CAPTION>

Years ended September 30,
<S>                                                               <C>      <C>
(Dollars in thousands)                                            1998     1997
- -------------------------------------------------------------------------------

Assets

Current assets:
   Cash and cash equivalents                                  $  4,241    5,818
   Accounts receivable, less allowance for doubtful accounts
     of $664 and $462 in 1998 and 1997, respectively            51,530   48,612
   Costs and estimated earnings on long-term contracts,
     less progress billings of $51,529 and $56,451 in 1998 
     and 1997, respectively                                     26,995   34,907
   Inventories                                                  81,579   64,836
   Other current assets                                          2,776    2,794
                                                               -------  -------
      Total current assets                                     167,121  156,967
                                                              -------- --------



Property, plant and equipment:
   Land and land improvements                                   14,318   12,449
   Buildings and leasehold improvements                         47,940   43,573
   Machinery and equipment                                      83,356   74,067
   Construction in progress                                      4,718    4,913
                                                              -------- --------
                                                               150,332  135,002
   Less accumulated depreciation and amortization               52,323   38,470
                                                              -------- --------
      Net property, plant and equipment                         98,009   96,532

Excess of cost over net assets of purchased businesses,
   less accumulated amortization of $4,557 and $2,735 in 
   1998 and 1997, respectively                                  72,512   54,996
Deferred tax assets                                             44,740   48,510
Other assets                                                    26,920   21,182
                                                              -------- --------
                                                              $409,302 $378,187
- -------------------------------------------------------------------------------
</TABLE>

                                        20
<PAGE>   11



CONSOLIDATED BALANCE SHEETS
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
Years ended September 30,
(Dollars in thousands)                                                            1998              1997 
- ----------------------------------------------------------------------------------------------------------
<S>                                                                             <C>                 <C>
LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES:
   Short-term borrowings and current maturities of long-term debt               $ 30,111            25,500 
   Accounts payable                                                               39,908            38,238 
   Advance payments on long-term contracts, less costs incurred
      of $5,046 and $1,624 in 1998 and 1997, respectively                         11,442             6,348 
   Accrued expenses                                                               25,346            24,590 
                                                                                --------           -------
      Total current liabilities                                                  106,807            94,676 
                                                                                --------           -------
Other liabilities                                                                 28,339            28,548 
Long-term debt                                                                    50,077            50,000 
                                                                                --------           -------
      Total liabilities                                                          185,223           173,224 
                                                                                --------           -------
Commitments and contingencies                                                          -                 -

SHAREHOLDERS' EQUITY
   Preferred stock, par value $.01 per share, authorized 10,000,000 shares             -                 -
   Common stock, par value $.01 per share, authorized 50,000,000 shares;
      issued 12,641,664 and 12,478,328 shares in 1998 and 1997, respectively         126               125 
   Additional paid-in capital                                                    200,913           194,663 
   Retained earnings since elimination of deficit at September 30, 1993           27,277            15,981 
   Cumulative foreign currency translation adjustments                               520               196 
   Minimum pension liability                                                      (2,260)             (181)
                                                                                --------           -------
                                                                                 226,576           210,784 
   Less treasury stock, at cost (234,025 and 689,945 common shares in 1998
      and 1997, respectively)                                                     (2,497)           (5,821)
                                                                                --------           -------
      Total shareholders' equity                                                 224,079           204,963 
                                                                                --------           -------
                                                                                $409,302           378,187 
==========================================================================================================
</TABLE>









See accompanying notes to consolidated financial statements.

                                                                              21
<PAGE>   12



CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>

                                                                                              Cumulative 
                                                                                                 Foreign 
                                                  Common Stock      Additional     Retained     Currency      Minimum 
Years ended September 30,                         ------------         Paid-in     Earnings  Translation      Pension     Treasury 
(In thousands)                               Shares       Amount       Capital     (Deficit) Adjustments    Liability        Stock 
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                          <C>          <C>          <C>          <C>             <C>        <C>          <C>    
Balance, September 30, 1995                  11,574       $  116       210,205      (21,952)         292       (1,998)      (4,408)
   Stock options and stock
      compensation plans                        841            8         3,214           --           --           --           28 
   Net earnings                                  --           --            --       26,136           --           --           -- 
   Effect of Corporate Readjustment
      on taxes                                   --           --        15,094           --           --           --           -- 
   Cash distribution ($3.00 per share)           --           --       (35,546)          --           --           --           -- 
   Translation adjustments                       --           --            --           --         (185)          --           -- 
   Minimum pension liability                     --           --            --           --           --          129           -- 
- ----------------------------------------------------------------------------------------------------------------------------------
Balance, September 30, 1996                  12,415          124       192,967        4,184          107       (1,869)      (4,380)

   Stock options and stock
      compensation plans                         63            1         1,696           --           --           --           45 
   Net earnings                                  --           --            --       11,797           --           --           -- 
   Purchases into treasury                       --           --            --           --           --           --       (1,486)
   Translation adjustments                       --           --            --           --           89           --           -- 
   Minimum pension liability                     --           --            --           --           --        1,688           -- 
- ----------------------------------------------------------------------------------------------------------------------------------
Balance, September 30, 1997                  12,478          125       194,663       15,981          196         (181)      (5,821)

   Stock options and stock
      compensation plans                        164            1         1,137           --           --           --          405 
   Net earnings                                  --           --            --       11,296           --           --           -- 
   Acquisition of business                       --           --         5,113           --           --           --        3,496 
   Purchases into treasury                       --           --            --           --           --           --         (577)
   Translation adjustments                       --           --            --           --          324           --           -- 
   Minimum pension liability                     --           --            --           --           --       (2,079)          -- 
- ----------------------------------------------------------------------------------------------------------------------------------
Balance, September 30, 1998                  12,642       $  126       200,913       27,277          520       (2,260)      (2,497)
==================================================================================================================================
</TABLE>













See accompanying notes to consolidated financial statements.

22



<PAGE>   13

CONSOLIDATED STATEMENTS OF CASH FLOW

<TABLE>
<CAPTION>

Years ended September 30,
(Dollars in thousands)                                                                      1998             1997              1996
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                     <C>                <C>              <C>    
Cash flows from operating activities:
   Net earnings                                                                         $ 11,296           11,797            26,136 
   Adjustments to reconcile net earnings to net cash                                                                                
      provided by operating activities:                                                                                             
         Depreciation and amortization                                                    17,460           14,423            13,486 
         Changes in operating working capital                                            (11,094)          (2,666)            5,852 
         Write-off of certain assets                                                       2,500                -            25,300 
         Gain on sale of Hazeltine                                                             -                -           (48,500)
         Effect of deferred taxes on tax provision                                         6,121            4,816           (12,598)
         Other                                                                            (5,971)          (3,033)           (8,698)
                                                                                        --------         --------           -------
      Net cash provided by operating activities                                           20,312           25,337               978 
                                                                                        --------         --------           -------

Cash flows from investing activities:
   Capital expenditures                                                                  (12,896)         (10,526)           (8,558)
   Divestiture (acquisition) of businesses                                               (11,323)         (93,200)          110,000 
                                                                                        --------         --------           ------- 
      Net cash provided (used) by investing activities                                   (24,219)        (103,726)          101,442 
                                                                                        --------         --------           ------- 
                                                                                                                                    
Cash flows from financing activities:                                                                                               
   Proceeds from long-term debt                                                            7,000           60,000                 - 
   Principal payments on long-term debt                                                   (7,504)         (15,675)          (15,386)
   Net increase (decrease) in short-term borrowings                                        3,476           18,500           (33,000)
   Special cash distribution/purchases of common stock into treasury                        (695)          (1,486)          (35,546)
   Other                                                                                      53              659             3,401 
                                                                                        --------         --------           -------
      Net cash provided (used) by financing activities                                     2,330           61,998           (80,531)
                                                                                        --------         --------           -------
Net increase (decrease) in cash and cash equivalents                                      (1,577)         (16,391)           21,889 
Cash and cash equivalents at beginning of year                                             5,818           22,209               320 
                                                                                        --------         --------           ------- 
Cash and cash equivalents at end of year                                                $  4,241            5,818            22,209 
=================================================================================================================================== 
                                                                                                                                    
                                                                                                                                    
Changes in operating working capital:                                                                                               
   Accounts receivable, net                                                             $ (1,745)          (2,997)            5,487 
   Costs and estimated earnings on long-term contracts, net                                4,858           (3,048)          (14,382)
   Inventories                                                                           (17,737)          18,618            20,730 
   Other current assets                                                                      143              734               (15)
   Accounts payable                                                                          245           (8,522)              133 
   Advance payments on long-term contracts, net                                            5,094           (1,988)           (7,183)
   Accrued expenses                                                                       (1,952)          (5,463)            1,082 
                                                                                        --------         --------           ------- 
                                                                                        $(11,094)          (2,666)            5,852 
=================================================================================================================================== 
                                                                                                                                    
                                                                                                                                    
Supplemental cash flow information:                                                                                                 
      Interest paid                                                                     $  7,521            4,981             4,765 
      Income taxes paid                                                                      353              720               673 
===================================================================================================================================
</TABLE>

See accompanying notes to consolidated financial statements.

                                                                              23
<PAGE>   14
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     (A)  PRINCIPLES OF CONSOLIDATION
          The consolidated financial statements include the accounts of ESCO
     Electronics Corporation (ESCO) and its wholly owned subsidiaries (the
     Company). All significant intercompany transactions and accounts have been
     eliminated in consolidation. Certain prior year amounts have been
     reclassified to conform with the 1998 presentation.

     (B)  BASIS OF PRESENTATION
          Effective September 30, 1990, Emerson Electric Co. (Emerson)
     transferred the stock of certain of its subsidiaries, primarily related to
     its government and defense business, to ESCO and distributed all of the
     issued and outstanding ESCO common stock to Emerson shareholders (the
     spin-off). Effective September 30, 1993, the Company implemented an
     accounting readjustment in accordance with the accounting provisions
     applicable to a "quasi-reorganization" which restated assets and
     liabilities to fair values and eliminated the deficit in retained earnings.
          Fair values of the Company's financial instruments are estimated by
     reference to quoted prices from market sources and financial institutions,
     as well as other valuation techniques. The estimated fair value of each
     class of financial instruments approximated the related carrying value at
     September 30, 1998 and 1997.

     (C)  NATURE OF OPERATIONS
          The Company is engaged in the research, development, manufacture, sale
     and support of a wide variety of defense and commercial systems and
     products. Defense items principally are supplied to the United States
     Government under prime contracts from the Army, Navy and Air Force and
     under subcontracts with their prime contractors, and are also sold to
     foreign customers. Commercial items are supplied to a variety of customers
     worldwide, and include filtration/fluid flow products sold to aerospace,
     automotive, industrial and medical/health care markets. Commercial products
     also include electromagnetic compatibility (EMC) test equipment and
     communications systems used by electric utilities. 
          The Company operates in two principal industry segments: commercial 
     and defense. The Company's main products include defense electronics, 
     defense systems, filtration/fluid flow, communications/test and other 
     industrial and government products.

     (D)  USE OF ESTIMATES AND BUSINESS RISKS
          The preparation of financial statements in conformity with generally
     accepted accounting principles requires management to make estimates and
     assumptions, including estimates of anticipated contract costs and revenues
     utilized in the earnings process, 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. 
           Sales to the U.S. Government may be affected by changes in 
     procurement policies, budget considerations, changing concepts of national 
     defense and other factors. Fluctuations and changes in any of these areas
     could materially impact the Company's financial statements in future years.

     (E)  ACCOUNTING CHANGES
          Effective September 30, 1997, the Company adopted SFAS No. 123,
     "Accounting for Stock-Based Compensation". SFAS No. 123 allows, and the
     Company elected, to continue its accounting under Accounting Principles
     Board (APB) Opinion No. 25, "Accounting for Stock Issued to Employees". The
     Company adopted the provisions of SFAS No. 123 requiring disclosure of the
     pro forma effect on net earnings and earnings per share as if compensation
     cost had been recognized based upon the estimated fair value at the date of
     grant for options and performance shares.
          Effective October 1, 1997, the Company adopted SFAS No. 128, "Earnings
     Per Share", and SFAS No. 129, "Disclosure of Information about Capital
     Structure".


24
<PAGE>   15
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


     (F)  REVENUE RECOGNITION
          Revenue on production contracts is recorded when specific contract
     terms are fulfilled, usually by delivery or acceptance (the units of
     production or delivery methods). The costs attributed to units delivered
     are based on the estimated average costs of all units expected to be
     produced in a contract or group of contracts. Revenue under long-term
     contracts for which units of production or delivery are inappropriate
     measures of performance is recognized on the percentage-of-completion
     method based upon incurred costs compared to total estimated costs under
     the contract, or are based upon equivalent units produced. Revenue under
     engineering contracts is generally recognized as milestones are attained.
          Revenues from cost reimbursement contracts are recorded as costs are
     incurred, plus fees earned. Estimated amounts for contract changes and
     claims are included in contract revenues only when realization is probable.
     Revisions to assumptions and estimates, primarily in contract value and
     estimated costs used for recording sales and earnings, are reflected in the
     accounting period in which the facts become known. Losses recognized on
     certain contracts include a provision for the future selling, general and
     administrative costs applicable to the respective contracts.
          Revenue is recognized on commercial sales when products are shipped or
     when services are performed.

     (G)  CASH AND CASH EQUIVALENTS
          Cash equivalents include temporary investments that are readily
     convertible into cash, such as certificates of deposit, commercial paper
     and treasury bills with original maturities of three months or less.

     (H)  COSTS AND ESTIMATED EARNINGS ON LONG-TERM CONTRACTS
          Costs and estimated earnings on long-term contracts represent unbilled
     revenues, including accrued profits on long-term contracts accounted for
     under the percentage-of-completion method, net of progress billings.

     (I)  INVENTORIES
          Inventories under long-term contracts reflect accumulated production
     costs, factory overhead, initial tooling and other related costs less the
     portion of such costs charged to cost of sales and any progress payments
     received. In accordance with industry practice, costs incurred on contracts
     in progress include amounts relating to programs having production cycles
     longer than one year, and a portion thereof will not be realized within one
     year. 
           Other inventories are carried at the lower of cost (first-in,
     first-out) or market.

     (J)  PROPERTY, PLANT AND EQUIPMENT
          Property, plant and equipment are recorded at cost. Depreciation and
     amortization are computed on accelerated methods over the estimated useful
     lives of the assets: buildings, 10-40 years; machinery and equipment, 5-10
     years; and office furniture and equipment, 5-10 years. Leasehold
     improvements are amortized over the remaining term of the applicable lease
     or their estimated useful lives, whichever is shorter.

     (K)  EXCESS OF COST OVER NET ASSETS OF PURCHASED BUSINESSES
          Assets and liabilities related to business combinations accounted for
     as purchase transactions are recorded at their respective fair values.
     Excess of cost over the fair value of net assets purchased (goodwill) is
     amortized on a straight-line basis over the periods estimated to be
     benefited, not exceeding 40 years. The Company assesses the recoverability
     of this intangible asset by determining whether the amortization of the
     asset balance over its remaining life can be recovered through undiscounted
     future operating cash flows.

     (L)  INCOME TAXES
          Income taxes are accounted for under the asset and liability method.
     Deferred tax assets and liabilities are recognized for the future tax
     consequences attributable to differences between the financial statement
     carrying amounts of existing assets and liabilities and their respective
     tax bases. Deferred tax assets and liabilities are measured using enacted
     tax rates expected to apply to taxable income in the years in which those
     temporary differences are expected to be recovered or settled. Deferred tax
     assets are reduced by a valuation allowance if it is more likely than not
     that some portion or all of the deferred tax assets will not be realized.
     The effect on deferred tax assets and liabilities of a change in tax rates
     is recognized in income in the period that includes the enactment date.


                                                                              25
<PAGE>   16
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

     (M)  RESEARCH AND DEVELOPMENT COSTS
          Company-sponsored research and development costs include research and
     development and bid and proposal efforts related to U.S. Government and
     commercial products and services. Company-sponsored product development
     costs are charged to expense when incurred. Customer-sponsored research and
     development costs incurred pursuant to contracts are accounted for similar
     to other program costs.

     (N)  FOREIGN CURRENCY TRANSLATION
          The financial statements of the Company's foreign operations are
     translated into U.S. dollars in accordance with SFAS No. 52, "Foreign
     Currency Translation". The resulting translation adjustments are recorded
     as a separate component of shareholders' equity.

     (O)  EARNINGS PER SHARE
          Basic earnings per share is calculated using the weighted average
     number of common shares outstanding during the period. Diluted earnings per
     share is calculated using the weighted average number of common shares
     outstanding during the period plus shares issuable upon the assumed
     exercise of dilutive common share options and performance shares by using
     the treasury stock method. The number of shares used in the calculation of
     earnings per share for each year presented is as follows:

<TABLE>
<CAPTION>

(In thousands)                                          1998      1997      1996 
- --------------------------------------------------------------------------------
<S>                                                   <C>       <C>       <C>   
Weighted Average Shares Outstanding-- Basic           12,015    11,805    11,262
Dilutive Options and Performance Shares                  535       469       318
                                                      ------    ------    ------
Adjusted Shares-- Diluted                             12,550    12,274    11,580
================================================================================
</TABLE>

          Options to purchase 84,000, 94,800 and 41,300 shares of common stock
     at per share prices ranging from $18 to $19.22 in 1998, $12.38 in 1997 and
     $12 in 1996 were outstanding during the years ended September 30, 1998,
     1997 and 1996, respectively, but were not included in the respective
     computations of diluted EPS because the options' exercise price was greater
     than the average market price of the common shares. These options expire in
     2007 and 2008. Approximately 166,000, 338,000 and 53,000 performance shares
     were outstanding but unearned at September 30, 1998, 1997 and 1996,
     respectively, and therefore, were not included in the respective
     computations of diluted EPS. The unearned performance shares expire in
     2001.

2. ACQUISITIONS/DIVESTITURES (UNAUDITED)
          On July 1, 1998, the Company completed the acquisition of Advanced
     Membrane Technology, Inc. (AMT) and renamed the company PTI Advanced
     Filtration Inc. (PTA). PTA, headquartered in San Diego, California, designs
     and manufactures several types of filtration membrane and provides
     filtration systems for a variety of applications in the process industries.
     The transaction involved the purchase of AMT common stock for approximately
     $7 million in cash plus approximately 450,000 shares of ESCO common stock
     valued at $8.6 million. 
          On December 31, 1997, the Company completed the purchase of Euroshield
     OY for consideration which included $3.5 million in cash. Euroshield,
     located in Eura, Finland, designs and manufactures high quality shielding
     products used in the electromagnetic compatibility (EMC) industry.
          On February 7, 1997, the Company completed the acquisition of the
     filtration and the thermoform packaging businesses (Filtertek) of Schawk,
     Inc. The transaction involved the purchase of assets and stock of certain
     subsidiary corporations of Schawk, Inc. for $92 million in cash plus
     working capital adjustments in 1998. Filtertek is a leader in the
     manufacture of plastic insert injection molded filter assemblies.


26
<PAGE>   17
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

          On July 22, 1996, the Company completed the sale of its Hazeltine
     subsidiary to GEC-Marconi Electronic Systems Corporation (GEC). The Company
     sold 100% of the common stock of Hazeltine for $110 million in cash,
     resulting in a $48.5 million gain. Certain assets and liabilities of
     Hazeltine were retained by the Company. 
          Included in the 1996 consolidated statements of operations are the 
     operating results of Hazeltine prior to its divestiture as follows:

<TABLE>
<CAPTION>

            (Dollars in thousands)                                          1996
- --------------------------------------------------------------------------------
                                                                         
<S>                                                                      <C>    
            Net sales                                                    $93,987
            Cost of sales                                                 75,598
            Selling, general and administrative expenses                  12,859
            Other costs and expenses, net                                    941
                                                                         -------
            Earnings before income taxes                                 $ 4,589
================================================================================
</TABLE>

          All of the Company's acquisitions have been accounted for using the
     purchase method of accounting, and accordingly, the respective purchase
     prices were allocated to the assets (including intangible assets) acquired
     and liabilities assumed based on estimated fair values at the date of
     acquisition. The excess cost of the acquisitions over the estimated fair
     value of the net assets acquired is being amortized on a straight-line
     basis over periods ranging from 15-40 years, depending on management's
     assessment of its useful life. The financial results from these
     acquisitions have been included in the Company's financial statements from
     the date of acquisition.
          The following unaudited pro forma financial information assumes the
     acquisitions of AMT, Euroshield and Filtertek had occurred on October 1,
     1996. The pro forma summary is not necessarily indicative of the results of
     operations that would have occurred had the acquisitions been completed on
     October 1, 1996, or of future results of operations.

<TABLE>
<CAPTION>
            Years ended September 30,                  Pro forma (Unaudited)
            (Dollars in thousands)                       1998             1997 
- --------------------------------------------------------------------------------
<S>                                               <C>                    <C>    
            Net sales                             $   374,751            416,281
            Net earnings                               11,421             11,412
            Earnings per share:
               Basic                                      .95                .97
               Diluted                                    .91                .93
================================================================================
</TABLE>

3. ACCOUNTS RECEIVABLE

          Accounts receivable consist of the following at September 30, 1998 and
     1997:

<TABLE>
<CAPTION>
            (Dollars in thousands)                             1998        1997 
- --------------------------------------------------------------------------------
<S>                                                          <C>          <C>   
            U.S. Government and prime contractors            $10,801      11,191
            Commercial                                        38,371      35,482
            Other                                              2,358       1,939
                                                             -------     -------
               Total                                         $51,530      48,612
================================================================================
</TABLE>

          The increase in commercial accounts receivable in 1998 is primarily
     due to increased sales volume in the fiscal fourth quarter at DCSI.

                                                                              27

<PAGE>   18
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

4. INVENTORIES

          Inventories consist of the following at September 30, 1998 and 1997:

<TABLE>
<CAPTION>
(Dollars in thousands)                                         1998        1997 
- --------------------------------------------------------------------------------
<S>                                                         <C>          <C>
Finished goods                                               $ 9,491       8,542
Work in process-- including long-term contracts               54,754      42,697
Raw materials                                                 17,334      13,597
                                                             -------     -------
    Total                                                    $81,579      64,836
================================================================================
</TABLE>

          Under the contractual arrangements by which progress payments are
     received, the U.S. Government has a security interest in the inventories
     associated with specific contracts. Inventories are net of progress payment
     receipts of $14 million and $3.2 million at September 30, 1998 and 1997,
     respectively. 
          Work in process includes $24.7 million and $19.7 million at September
     30, 1998 and 1997, respectively, of Tunner inventory relating to specific
     future contract awards. These precontract costs were incurred based on the
     U.S. Air Force's identified future loader requirements. The Company is
     currently amortizing these costs over the multi-year contracts as awarded.

5. PROPERTY, PLANT AND EQUIPMENT
          Depreciation and amortization of property, plant and equipment for the
     years ended September 30, 1998, 1997 and 1996 were $14,589,000, $12,441,000
     and $12,163,000, respectively.
          The Company leases certain real property, equipment and machinery
     under noncancelable operating leases. Rental expense under these operating
     leases for the years ended September 30, 1998, 1997 and 1996 amounted to
     $5,675,000, $4,502,000 and $4,759,000, respectively. Future aggregate
     minimum lease payments under operating leases that have initial or
     remaining noncancelable lease terms in excess of one year as of September
     30, 1998 are:

<TABLE>
<CAPTION>
(Dollars in thousands)   Years ending September 30:
- --------------------------------------------------------------------------------
<S>                                                               <C>
                         1999                                        $  5,354 
                         2000                                           3,599 
                         2001                                           2,822 
                         2002                                           2,417 
                         2003 and thereafter                            2,797 
                                                                      -------
                              Total                                   $16,989 
================================================================================
</TABLE>

6. INCOME TAX EXPENSE (BENEFIT)

          The principal components of income tax expense (benefit) for the years
     ended September 30, 1998, 1997 and 1996 consist of:

<TABLE>
<CAPTION>

            (Dollars in thousands)                                            1998                    1997                   1996 
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                                                       <C>                       <C>                   <C>
            Federal:
               Current                                                        $   --                    223                      -- 
               Deferred                                                        6,121                  4,816                 (12,598)
            State, local and foreign                                          (1,070)                 1,014                   1,224 
                                                                              ------                -------                 ------- 
               Total                                                          $5,051                  6,053                 (11,374)
===================================================================================================================================
</TABLE>

          The actual income tax expense for the years ended September 30, 1998,
     1997 and 1996 differs from the expected tax expense for those years
     (computed by applying the U.S. Federal statutory rate) as follows:


28
<PAGE>   19
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
            (Dollars in thousands)                                                 1998                  1997                 1996  
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                            <C>                    <C>                  <C>   
            Federal corporate statutory rate                                      35.0%                  35.0%                35.0% 
            Effect of Corporate Readjustment on temporary differences               --                     --                102.2  
            Net change in the balance of the tax valuation allowance               3.0                   (6.8)               100.2  
            Effect of subsidiary divestiture on temporary differences               --                     --               (314.0) 
            Income taxes, net of Federal benefits:
               State and local                                                    (2.8)                  (2.7)                 4.3  
               Foreign                                                              .4                   (1.1)                 1.1  
            Other, net                                                            (4.7)                   4.1                 (5.8) 
                                                                                 ------                ------               ------ 
            Effective income tax rate                                             30.9%                  33.9%               (77.0)%
==================================================================================================================================
</TABLE>

          The tax effects of temporary differences that give rise to significant
     portions of the deferred tax assets and liabilities at September 30, 1998,
     1997 and 1996 are presented below:


<TABLE>
<CAPTION>
            (Dollars in thousands)                                           1998                    1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>                        <C>                    <C>    
            Deferred tax assets:
               Inventories, long-term contract accounting,
                   contract cost reserves and others                       $      --                  7,371                  14,538 
               Pension and other postretirement benefits                      10,110                 10,272                   9,402 
               Net operating loss carryforwards                               39,961                 34,036                  42,188 
               Capital loss carryforwards                                     27,074                 27,074                  30,567 
               Other compensation-related costs and other
                  cost accruals                                               10,815                 11,960                   2,948 
                                                                           ---------              ---------                 ------- 
                  Total deferred tax assets                                   87,960                 90,713                  99,643 
            Deferred tax liabilities:
               Inventories, long-term contract accounting,
                   contract cost reserves and others                            (367)                    --                      -- 
               Plant and equipment, depreciation methods
                  and acquisition asset allocations                           (1,883)                (2,640)                 (3,011)
                                                                           ---------              ---------                 ------- 
                  Net deferred tax asset before valuation allowance           85,710                 88,073                  96,632 
            Less valuation allowance                                         (40,970)               (39,563)                (43,306)
                                                                           ---------              ---------                 ------- 
                  Net deferred tax asset                                   $  44,740                 48,510                  53,326 
===================================================================================================================================
</TABLE>

          Management believes it is more likely than not that with its
     projections of future taxable income, its shift in strategic direction, and
     after consideration of the valuation allowance, the Company will generate
     sufficient taxable income to realize the benefits of the net deferred tax
     assets existing at September 30, 1998.
          In order to fully realize the deferred tax assets existing at
     September 30, 1998, the Company will need to generate future taxable income
     of approximately $128 million of which $114 million is required to be
     realized prior to the expiration of the net operating loss (NOL)
     carryforwards, of which $33 million will expire in 2006; $6 million will
     expire in 2007; $23 million will expire in 2009; $38 million will expire in
     2010; $7 million will expire in 2011; and $7 million will expire in 2018.
     Also, the Company will need to generate future capital gains of
     approximately $77 million prior to 2001, at which time the capital loss
     carryforward, resulting from the 1996 divestiture of Hazeltine, will
     expire. There can be no assurance, however, that the Company will generate
     sufficient taxable income or specified level of continuing taxable income.
          During the year ended September 30, 1998, the Company increased its
     deferred tax valuation allowance to $41 million. A full valuation allowance
     of $27.1 million is being maintained against the deferred tax asset
     associated with the capital loss. The remaining balance of $13.9 million
     represents management's best estimate of the portion of deferred tax asset
     associated with temporary differences and NOLs which may not be realized.

                                                                              29

<PAGE>   20
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

7. DEBT

          Long-term debt consists of the following at September 30, 1998 and
     1997:

<TABLE>
<CAPTION>
            (Dollars in thousands)                                                                     1998                    1997 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                            <C>                        <C>
            Term loan                                                                               $57,000                  57,000 
            Other debt                                                                                1,188                      -- 
            Less current maturities                                                                  (8,111)                 (7,000)
                                                                                                    -------                 ------- 
                Long-term debt                                                                      $50,077                  50,000 
====================================================================================================================================
</TABLE>

          The Company's existing $132 million bank credit facility was amended
     on June 29, 1998 to increase the amount of the outstanding term loan by $7
     million to $59 million, and to reduce the revolving credit facility by $7
     million to $73 million. The term loan has scheduled amortization payments
     of $2 million per quarter. The revolving credit facility (subject to
     borrowing base asset limitations) is available for direct borrowings and/or
     the issuance of letters of credit. The maturity of the bank credit facility
     is September 30, 2000. These credit facilities are provided by a group of
     banks, led by Morgan Guaranty Trust Company of New York. At September 30,
     1998, the Company had $48.3 million available under the revolving credit
     facility.
          The amended credit facility requires, as determined by certain
     financial ratios, a commitment fee ranging from 5/16% to 7/16% per annum on
     the unused portion. The terms of the credit facility provide that interest
     on borrowings may be calculated at a spread over the London Interbank
     Offered Rate (LIBOR), or certificate of deposit rates for various
     maturities, or based on the prime rate, at the Company's election.
     Substantially all of the assets of the Company are pledged under the credit
     facility. The most restrictive financial covenants of the credit facility
     include minimum interest coverage, limitations on leverage and minimum
     tangible net worth. Dividends may not exceed 25% of the Company's
     consolidated net earnings.
          During 1998 and 1997, the maximum aggregate short-term borrowings at
     any month-end were $55.5 million and $55 million, respectively; the average
     aggregate short-term borrowings outstanding based on month-end balances
     were $39.8 million and $24.7 million, respectively; and the weighted
     average interest rates were 6.9% in 1998, 1997 and 1996. The letters of
     credit issued and outstanding under the credit facility totaled $2.7
     million at September 30, 1998 and 1997. Borrowings under the revolving
     credit facility were $22 million at September 30, 1998.
          Other debt of $1.2 million at September 30, 1998 relates to Euroshield
     borrowings existing at the date of acquisition.

8. CAPITAL STOCK

          The 12,641,664 and 12,478,328 common shares as presented in the
     accompanying consolidated balance sheets at September 30, 1998 and 1997
     represent the actual number of shares issued at the respective dates. The
     Company held 234,025 and 689,945 common shares in treasury at September 30,
     1998 and 1997, respectively. The decrease in treasury shares in 1998 is the
     result of the reissuance of approximately 450,000 treasury shares in
     conjunction with the July 1998 acquisition of PTA.
          Pursuant to a Deposit and Trust Agreement (the Trust Agreement), all
     of the outstanding shares of the Company's common stock are held in trust
     by a trustee on behalf of the persons otherwise entitled to hold the
     Company's common stock, and such persons, instead, hold common stock trust
     receipts (Receipts) representing the Company's common stock and associated
     preferred stock purchase rights (the Rights). Although the trustee is the
     record holder of the Company's common stock, each holder of a Receipt is
     generally entitled to all of the rights of a holder of the Company's common
     stock (including the right to vote and to receive dividends or other
     distributions), except in certain circumstances. If the Company fails in
     certain circumstances to collateralize its obligations to indemnify Emerson
     with respect to Emerson's guarantees of certain of the Company's government
     contracts and for so long as such failure continues, Emerson will have the
     right to direct the trustee how to vote in the election of directors and
     certain related matters. 

30
<PAGE>   21

          During 1995, the Company adopted the 1994 Stock Option Plan, and in
     1991, the Company adopted the 1990 Stock Option Plan (the Option Plans).
     The Option Plans permit the Company to grant key management employees (1)
     options to purchase shares of the Company's common stock (or Receipts
     representing such shares) or (2) stock appreciation rights with respect to
     all or any part of the number of shares covered by the options. As long as
     the Trust Agreement is in effect, an optionee will receive Receipts in lieu
     of shares. All outstanding options were granted at prices equal to fair
     market value at the date of grant. As a result of the $3.00 per share
     special cash distribution paid to shareholders in 1996 as a non-taxable
     return of capital, unexercised stock options were repriced, and the number
     of options outstanding were adjusted, using a method which resulted in no
     additional compensation expense to the Company. Information regarding stock
     options awarded under the Option Plans is as follows:
 
<TABLE>
<CAPTION>
                                                        1998                          1997                         1996 
                                                ------------------------     ------------------------       ----------------------- 
                                                               Estimated                     Estimated                   Estimated 
                                                   Shares     Avg. Price      Shares         Avg. Price     Shares       Avg. Price 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>          <C>             <C>          <C>              <C>     
           October 1,                             998,486        $  6.18      889,930         $  6.04      1,135,301        $  5.77 
               Granted                             89,500        $ 18.14      227,450         $ 10.78        497,250        $ 10.38 
               Exercised                         (107,964)       $  7.58      (68,371)        $  6.87       (806,255)       $  5.77 
               Cancelled                          (26,306)       $  7.20      (50,523)        $  9.28       (119,257)       $ 10.31 
               Repricing                               --             --           --              --        182,891        $  8.06 
- -----------------------------------------------------------------------------------------------------------------------------------
            September 30,                         953,716        $  8.61      998,486         $  6.18        889,930        $  6.04 
            At September 30,
               Reserved for future grant          133,128 
            Exercisable                           509,559        $  7.46      404,387         $  6.18        264,265        $  6.04 
===================================================================================================================================
</TABLE>

          During 1996, the Company announced a stock repurchase program. Under
     this program, the Company was authorized to purchase up to two million
     shares of its common stock in the open market through September 30, 1998.
     Approximately 180,000 shares were repurchased throughout that two-year
     period. Subsequent to September 30, 1998, the Company authorized an
     additional open market repurchase program of up to 1.3 million shares,
     which is subject to market conditions and other factors and will cover a
     period ending September 29, 2000.
          During 1993 and 1997, the Board of Directors authorized, and the
     shareholders approved, the Performance Share Plans (the Plans). The maximum
     number of shares available for issue under the Plans is 875,000 shares. As
     of September 30, 1998, 848,000 shares have been awarded, 503,000 shares
     have been earned and 310,000 shares have been issued under the terms of the
     Plans.
          At September 30, 1998, there were 50,000 shares of restricted stock
     outstanding and held by certain key executives. These shares will be earned
     ratably through the period ending September 30, 2001.
          The Company has a Preferred Stock Purchase Rights Plan pursuant to
     which a dividend of one Right was declared for each outstanding share of
     the Company's common stock. Each Right entitles the holder to purchase one
     one-hundredth of a share of preferred stock at an initial purchase price of
     $25. Approximately 120,000 preferred shares are reserved for issuance under
     this plan. Under certain conditions involving the acquisition of, or an
     offer for, 20% or more of the Company's common stock, all holders of
     Rights, except an acquiring entity, would be entitled (1) to purchase, at a
     defined price, common stock of the Company or an acquiring entity at a
     value twice the defined price, or (2) at the option of the Board, to
     exchange each Right for one share of common stock. The Rights remain in
     existence until September 30, 2000, unless redeemed earlier (at one cent
     per Right), exercised or exchanged under the terms of the plan.
          The Company adopted the disclosure-only provisions of SFAS No. 123.
     Under APB No. 25, no compensation cost was recognized for the Company's
     stock option plans. Had compensation cost for the Company's stock option
     plans and performance share plans been determined based on the fair value
     at the grant date for awards in 1998 and 1997 consistent with the
     provisions of this statement, the Company's net earnings and net earnings
     per share would have been as follows: 

                                                                              31
<PAGE>   22
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

<TABLE>
<CAPTION>
                                                                                                           Pro forma (unaudited)
            (Dollars in thousands, except per share amounts)                                           1998                  1997 
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                               <C>                     <C>
            Net earnings                                                                            $11,221                 10,873 
            Net earnings per share:
               Basic                                                                                    .93                    .92 
               Diluted                                                                                  .89                    .89 
==================================================================================================================================
</TABLE>

          The fair value of each option grant is estimated on the date of grant
     using the Black-Scholes option-pricing model with the following
     weighted-average assumptions used for grants in 1998 and 1997,
     respectively: expected dividend yield of 0% in both periods; expected
     volatility of 37.19% and 35.45%; risk-free interest rate of 4.42% and
     6.299% and expected life based on historical exercise periods of 4.11 years
     and 3.68 years.
          To determine the fair value of grants under the Performance Share
     Plans, the probability that performance milestones would be met were
     applied to the ESCO stock price on the date of grant. This probability was
     based on an estimated average annual growth rate of 10.0% and an annualized
     volatility of 32.5%.

9. RETIREMENT AND OTHER BENEFIT PLANS

          Substantially all employees are covered by defined benefit or defined
     contribution pension plans maintained by the Company for the benefit of its
     employees. Benefits are provided to employees under defined benefit
     pay-related and flat-dollar plans which are primarily noncontributory.
     Annual contributions to retirement plans equal or exceed the minimum
     funding requirements of the Employee Retirement Income Security Act or
     applicable local regulations. Pension expense for the years ended September
     30, 1998, 1997 and 1996 is comprised of the following:

<TABLE>
<CAPTION>
            (Dollars in millions)                                               1998                   1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>                      <C>                     <C> 
            Defined benefit plans:
               Service cost (benefits earned during the period)                $ 3.5                    3.3                     3.2 
               Interest cost                                                     6.1                    5.4                     5.0 
               Actual return on plan assets                                       .7                  (19.0)                   (5.5)
               Net amortization and deferral                                    (7.1)                  13.5                      .8 
                                                                               -----                 ------                   ----- 
                  Net periodic pension expense                                   3.2                    3.2                     3.5 
            Defined contribution plans                                            .4                     .4                     2.1 
                                                                               -----                 ------                   ----- 
                  Total                                                        $ 3.6                    3.6                     5.6 
===================================================================================================================================
</TABLE>

          The funded status of the Company's defined benefit pension plans as of
     September 30, 1998 and 1997 is shown below:

<TABLE>
<CAPTION>
            (Dollars in millions)                                                                      1998                    1997 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                                 <C>                    <C>
            Accumulated benefit obligation, including vested benefit obligation of
               $74.7 and $59.4 at September 30, 1998 and 1997, respectively                           $78.7                   63.1 
                                                                                                      -----                  ----- 
            Projected benefit obligation                                                               96.0                   77.6 
            Plan assets at fair value, primarily corporate equity and
               fixed income securities                                                                 77.9                   78.9 
                                                                                                      -----                  ----- 
            Projected benefit obligation in excess of (less than) plan assets                          18.1                   (1.3)
            Unrecognized transition amount                                                               --                     -- 
            Unrecognized net gain (loss)                                                               (7.3)                  12.2 
            Unrecognized prior service costs                                                           (1.9)                  (2.5)
            Additional minimum liability                                                                4.1                    2.3 
                                                                                                      -----                  ----- 
               Net pension liability (included in other liabilities)                                  $13.0                   10.7 
===================================================================================================================================
</TABLE>

32
<PAGE>   23
          The benefit obligations of the defined benefit plans as of September
     30, 1998 and 1997 were based on discount rates of 6.75% and 7.5%,
     respectively, and an assumed rate of increase in compensation levels of 4%.
     The 1998, 1997 and 1996 pension expense for the defined benefit plans was
     based on a 6.75%, 7.5% and 7.5% discount rate, respectively, a 4% increase
     in compensation levels, and a 10% expected long-term rate of return on plan
     assets.
          In addition to providing retirement income benefits, the Company
     provides unfunded postretirement health and life insurance benefits to
     certain retirees. To qualify, an employee must retire at age 55 or later
     and the employee's age plus service must equal or exceed 75. Retiree
     contributions are defined as a percentage of medical premiums.
     Consequently, retiree contributions increase with increases in the medical
     premiums. The life insurance plans are noncontributory and provide coverage
     of a flat dollar amount for qualifying retired employees.
          Net periodic postretirement benefit cost is comprised of the
     following:

<TABLE>
<CAPTION>
            (Dollars in millions)                                               1998                   1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>                       <C>                     <C>
            Service cost                                                        $ .2                     .2                      .2 
            Interest cost                                                        1.1                    1.2                     1.3 
                                                                              ------                 ------                   ----- 
               Net periodic postretirement benefit cost                         $1.3                    1.4                     1.5 
===================================================================================================================================
</TABLE>

          Accumulated postretirement benefit obligation as of September 30, 1998
     and 1997 is shown below:

<TABLE>
<CAPTION>
            (Dollars in millions)                                                                      1998                    1997 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                                                  <C>                     <C>  
            Retirees                                                                                  $12.1                    12.1 
            Fully eligible active plan participants                                                      .6                      .5 
            Other active participants                                                                   3.3                     3.0 
                                                                                                      -----                   ----- 
               Total accumulated postretirement benefit obligation                                     16.0                    15.6 
            Plan assets                                                                                   -                       -
                                                                                                      -----                   ----- 
                Accumulated postretirement benefit obligation in excess of plan assets                 16.0                    15.6 
            Unrecognized prior service cost                                                              .1                      .1 
            Unrecognized net gain (loss)                                                               (1.1)                     .1 
                                                                                                      -----                   ----- 
               Accrued postretirement benefit obligation (included in other liabilities)              $15.0                    15.8 
===================================================================================================================================
</TABLE>

          The accumulated postretirement benefit obligations of the plans as of
     September 30, 1998 and 1997 were based on discount rates of 6.75% and 7.5%,
     respectively. The September 30, 1997 accumulated postretirement benefit
     obligation was based on a health care cost trend of 7.5% for 1998,
     gradually grading down to an ultimate rate of 5.5% by 2002. The September
     30, 1998 accumulated postretirement benefit obligation was based on a
     health care cost trend of 7% for 1999, gradually grading down to an
     ultimate rate of 5.5% by 2002. A 1% increase in the health care cost trend
     rate for each year would increase the September 30, 1998 accumulated
     postretirement benefit obligation by approximately $400,000.
          The 1998, 1997 and 1996 net periodic postretirement benefit costs were
     based on discount rates of 6.75%, 7.5%, and 7.5%, respectively. The net
     periodic postretirement benefit cost was based on an assumed health care
     cost trend of 7.5%, 8% and 8.5% for 1998, 1997 and 1996, respectively,
     gradually grading down to 5.5% by fiscal 2002. A 1% increase in the health
     care cost trend rate for each year would increase the aggregate of the
     service cost and interest cost components of the 1998 net periodic
     postretirement benefit cost by approximately $35,000.

                                                                              33


<PAGE>   24
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

10. OTHER FINANCIAL DATA
 
          Items charged to operations during the years ended September 30, 1998,
     1997 and 1996 included the following:
 
<TABLE>
<CAPTION>
            (Dollars in thousands)                                              1998                   1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                    <C>                        <C>                     <C>   
            Maintenance and repairs                                        $   6,751                  5,828                   5,826 
            Salaries and wages                                               133,507                113,953                 136,783 
                                                                           ---------                -------                -------- 
            Research and development costs:
               Company-sponsored                                           $   5,866                  6,161                  11,905 
               Customer-sponsored                                             10,201                  6,341                   3,894 
                                                                           ---------                -------                -------- 
                  Total                                                    $  16,067                 12,502                  15,799 
===================================================================================================================================
</TABLE>
 
          The increase in 1998 research and development costs is due to the
     inclusion of Filtertek for the full year and additional expenditures at
     Rantec. The decrease in 1997 from 1996 is due to the divestiture of
     Hazeltine in 1996.
          Accrued expenses included accrued employee compensation of $10.2
     million and $9.3 million at September 30, 1998 and 1997, respectively.
 
11. BUSINESS SEGMENT INFORMATION
 
          The Company's principal business segments are defense and commercial.
     Summarized below is the Company's business segment information for the
     years ended September 30, 1998, 1997 and 1996. Sales between segments have
     been eliminated. Corporate expenses and assets have been allocated to the
     segment data on a systematic basis. Hazeltine primarily operated within the
     defense segment prior to its divestiture in 1996. Filtertek is included in
     the commercial results for 1998 and 1997. Operating profit (loss) is
     calculated as: net sales, less cost of sales, less other charges related to
     cost of sales, less selling, general and administrative expenses.
 
<TABLE>
<CAPTION>
            (Dollars in thousands)                                              1998                   1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                    <C>                        <C>                     <C>   
            Net sales:
               Defense                                                     $ 158,944                191,039                 300,970 
               Commercial                                                    206,139                187,485                 137,573 
                                                                           ---------               --------                 ------- 
                                                                           $ 365,083                378,524                 438,543 
- -----------------------------------------------------------------------------------------------------------------------------------
            Operating profit (loss):
               Defense                                                     $   9,682                 13,408                 (31,842)
               Commercial                                                     17,243                 14,184                   7,902 
                                                                           ---------               --------                 ------- 
                                                                           $  26,925                 27,592                 (23,940)
- -----------------------------------------------------------------------------------------------------------------------------------
            Identifiable assets:
               Defense                                                     $ 165,136                166,063                 191,588 
               Commercial                                                    244,166                212,124                 116,244 
                                                                           ---------               --------                 ------- 
                                                                           $ 409,302                378,187                 307,832 
- -----------------------------------------------------------------------------------------------------------------------------------
            Depreciation and amortization:
               Defense                                                     $   4,500                  4,644                   8,001 
               Commercial                                                     12,960                  9,779                   5,485 
                                                                           ---------               --------                 ------- 
                                                                           $  17,460                 14,423                  13,486 
- -----------------------------------------------------------------------------------------------------------------------------------
            Capital Expenditures:
               Defense                                                     $   2,350                  3,131                   5,204 
               Commercial                                                     10,546                  7,395                   3,354 
                                                                           ---------               --------                 ------- 
                                                                           $  12,896                 10,526                   8,558 
===================================================================================================================================
</TABLE>
 
34
<PAGE>   25
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

          Net sales derived from U.S. Government agencies, either through direct
     sales or through prime contractors, totaled $148,273,000, $164,660,000 and
     $231,503,000 for the years ended September 30, 1998, 1997 and 1996,
     respectively.
          International sales included in net sales for the years ended
     September 30, 1998, 1997 and 1996 are as follows:

<TABLE>
<CAPTION>
            (Dollars in thousands)                                              1998                   1997                    1996 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                                        <C>                     <C>                     <C>
            Europe                                                           $37,619                 31,075                  53,856 
            Middle East                                                        3,944                  6,024                  19,223 
            Far East                                                           8,599                 17,773                  48,391 
            Other                                                              8,535                 13,954                  23,215
                                                                             -------                 ------                 ------- 
               Total                                                         $58,697                 68,826                 144,685 
===================================================================================================================================
</TABLE>

          The decrease in 1998 compared to 1997 is primarily due to lower Far
     East defense sales at SEI, partially offset by increased European sales at
     Filtertek.
          The decrease in 1997 compared to 1996 reflects the divestiture of
     Hazeltine in July 1996 and lower Middle East sales at SEI; offset by the
     addition of Filtertek ($10.3 million, primarily Europe) and higher volume
     at all other operating units. Hazeltine's international sales for 1996 were
     $58.6 million.

12. EMERSON CONTRACT GUARANTEES

          Emerson has directly or indirectly guaranteed or is otherwise liable
     for the performance of most of the Company's contracts with its customers
     which existed at September 30, 1990 (the Guaranteed Contracts). The
     Guaranteed Contracts include certain U.S. Government contracts entered into
     by the Company prior to September 30, 1990. As of September 30, 1998, the
     aggregate backlog of all firm orders received by the Company included
     Guaranteed Contracts of $1,591,000. At September 30, 1998, there were open
     letters of credit with an aggregate value of $2,443,000 related to foreign
     advance payments in support of various contracts that are directly or
     indirectly guaranteed by Emerson.

13. COMMITMENTS AND CONTINGENCIES

          At September 30, 1998, the Company had $5.1 million in letters of
     credit outstanding as guarantees of contract performance.
          In 1994, an action was commenced against the Company's Hazeltine
     subsidiary alleging injury caused by Hazeltine's purported release of
     hazardous materials. The Company believes that no one and no property were
     injured by any release of hazardous substances from Hazeltine's plant. In
     1996, the plaintiffs filed a motion to be certified as a class. This motion
     was denied and the plaintiffs appealed. The appellate court affirmed the
     denial. Based upon the current facts, the Company is not able to estimate
     the probable outcome. Therefore, no provision for this litigation has been
     made in the accompanying consolidated financial statements. Management
     believes the Company will be successful in defending this action and that
     the outcome will not have a material adverse effect on the Company's
     financial statements. This contingent liability was retained by the Company
     when Hazeltine was divested in 1996.
          As a normal incidence of the businesses in which the Company is
     engaged, various claims, charges and litigation are asserted or commenced
     against the Company. In the opinion of management, final judgments, if any,
     which might be rendered against the Company in current litigation are
     adequately reserved, covered by insurance, or would not have a material
     adverse effect on its financial statements. 

                                                                              35
<PAGE>   26
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

14. OTHER CHARGES RELATED TO COST OF SALES

          Other charges related to cost of sales of $2.5 million in 1998
     resulted from the Company's settlement of a long-standing contract dispute
     related to the original M1000 tank transporter program. The settlement
     agreement requires the customer (the U.S. Army) to pay the Company $7.5
     million in 1999, in exchange for the Company dropping its claim for damages
     and recovery of additional program costs incurred.
          During 1996, and in conjunction with the sale of Hazeltine and
     management's decision to pursue a strategy of deliberate diversification
     from defense to commercial, the Company reevaluated the carrying value of
     certain assets. As a result of this reevaluation, the Company recorded
     $25.3 million of other charges related to cost of sales in 1996.
          The 1996 charge included $14.3 million of inventories related to
     defense programs which the Company no longer intended to actively pursue;
     $6 million of costs included in other assets incurred in anticipation of
     certain defense contract awards which the Company is no longer actively
     pursuing; and a $5 million adjustment in the Company's estimate of
     recoveries in a contract dispute related to the M1000 tank transporter
     program.

15. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

<TABLE>
<CAPTION>
            (Dollars in thousands,                              First          Second          Third          Fourth         Fiscal 
            except per share amounts)                         Quarter         Quarter        Quarter         Quarter           Year 
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>               <C>            <C>             <C>            <C>
            1998
            Net sales                                        $ 78,077          86,030         98,236         102,740        365,083 
            Gross profit                                       22,029          24,596         25,641          22,985         95,251 
            Net earnings                                        2,610           3,240          3,847           1,599         11,296 
            Earnings per share:
               Basic                                         $    .22             .27            .32             .13            .94 
               Diluted                                            .21             .26            .31             .12            .90 
===================================================================================================================================

            1997
            Net sales                                        $ 68,899          88,811        109,348         111,466        378,524 
            Gross profit                                       16,960          22,427         25,513          26,834         91,734 
            Net earnings                                        2,182           2,767          3,330           3,518         11,797 
            Earnings per share:
               Basic                                         $    .18             .23            .28             .30           1.00 
               Diluted                                            .18             .23            .27             .28            .96 
===================================================================================================================================
</TABLE>

          Gross profit is computed as net sales, less cost of sales, less other
     charges related to cost of sales. 

          The 1997 quarterly financial information includes the results of
     Filtertek subsequent to the February 1997 acquisition.

36


<PAGE>   27

INDEPENDENT AUDITORS' REPORT

            THE BOARD OF DIRECTORS AND SHAREHOLDERS
            ESCO ELECTRONICS CORPORATION:
                 We have audited the accompanying consolidated balance sheets of
            ESCO Electronics Corporation and subsidiaries as of September 30,
            1998 and 1997, and the related consolidated statements of
            operations, shareholders' equity, and cash flows for each of the
            years in the three-year period ended September 30, 1998. These
            consolidated financial statements are the responsibility of the
            Company's management. Our responsibility is to express an opinion on
            these consolidated 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 consolidated financial statements referred
            to above present fairly, in all material respects, the financial
            position of ESCO Electronics Corporation and subsidiaries as of
            September 30, 1998 and 1997, and the results of their operations and
            their cash flows for each of the years in the three-year period
            ended September 30, 1998, in conformity with generally accepted
            accounting principles.

                                                           KPMG PEAT MARWICK LLP

            St. Louis, Missouri
            November 11, 1998


                                                                              37
<PAGE>   28
SHAREHOLDERS' SUMMARY
 
            CAPITAL STOCK INFORMATION
                 ESCO Electronics Corporation common stock trust receipts (and
            the underlying common stock and associated preferred stock purchase
            rights) (symbol ESE) are listed on the New York Stock Exchange.
                 There were approximately 8,700 holders of record of trust
            receipts representing shares of common stock at September 30, 1998.
 
                                                                              39
<PAGE>   29
 
COMMON STOCK MARKET PRICES
 
          The Company's common stock trust receipts and the underlying common
     stock and associated preferred stock purchase rights (subsequently referred
     to as common stock) are listed on the New York Stock Exchange under the
     symbol "ESE." The following table summarizes the high and low prices of the
     Company's common stock for each quarter of 1998 and 1997:

<TABLE>
<CAPTION>

                                                        1998                      1997
- --------------------------------------------------------------------------------------------------------------------------
                                 Quarter         High            Low          High       Low
- --------------------------------------------------------------------------------------------------------------------------
<S>                                          <C>            <C>         <C>          <C>    
                                 First          19 15/16       16 3/16     10 3/8        8 5/8
                                 Second         18 7/16        16          13 1/4        9 7/8
                                 Third          20 3/4         16 5/8      12 13/16      9 5/8
                                 Fourth         19 5/16         8 5/8      18 1/4       12 3/8
</TABLE>



38

<PAGE>   1
                                                                     EXHIBIT 21


                                SUBSIDIARIES OF
                          ESCO ELECTRONICS CORPORATION




<TABLE>
<CAPTION>
                                   
                                STATE OR JURISDICTION OF
                                   INCORPORATION OR        NAME UNDER WHICH IT
NAME                                 ORGANIZATION          DOES BUSINESS
- ----                                 ------------          -------------
<S>                                 <C>                   <C>
Defense Holding Corp.               Delaware              Same

Distribution Control Systems        Puerto Rico           Same                      
Caribe, Inc.                        

Distribution Control Systems, Inc.  Missouri              Same                               

EMC Test Systems, L.P.              Texas                 Same                               

Euroshield OY                       Finland               Same                               
                                                                           
Filtertek Inc.                      Delaware              Same and Tek                       
                                                          Packaging Division
                                                          
Filtertek BV                        Netherlands           Same                               

Filtertek de Puerto Rico, Inc.      Delaware              Same                               

Filtertek SA                        France                Same                               

PTI Advanced Filtration Inc.        Delaware              Same                               

PTI Technologies Inc.               Delaware              Same                               

PTI Technologies Limited            England               Same                               

Rantec Microwave & Electronics,     Delaware              Same                                                            
  Inc.                                                          
                                                                           
Systems & Electronics Inc.          Delaware              Same and                           
                                                          Comtrak Division  

VACCO Industries                    California            Same                               
</TABLE>                            





<PAGE>   1


                                                                      Exhibit 23







                                   Independent Auditors' Consent



The Board of Directors
ESCO Electronics Corporation:

We consent to incorporation by reference in the registration statements (Nos.
33-39737, 33-47916, and 33-98112) on Form S-8 of ESCO Electronics Corporation of
our report dated November 11, 1998, relating to the consolidated balance sheets
of ESCO Electronics Corporation and subsidiaries as of September 30, 1998 and
1997, and the related consolidated statements of operations, shareholders'
equity, and cash flows for each of the years in the three-year period ended
September 30, 1998, which report appears in the September 30, 1998 Annual Report
on Form 10-K of ESCO Electronics Corporation.




                                   KPMG Peat Marwick LLP



St. Louis, Missouri
December 21, 1998





<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-START>                             OCT-01-1997
<PERIOD-END>                               SEP-30-1998
<CASH>                                           4,241
<SECURITIES>                                         0
<RECEIVABLES>                                   52,193<F1>
<ALLOWANCES>                                       664
<INVENTORY>                                     81,579
<CURRENT-ASSETS>                               167,121
<PP&E>                                         150,332
<DEPRECIATION>                                  52,323
<TOTAL-ASSETS>                                 409,302
<CURRENT-LIABILITIES>                          106,807
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           126
<OTHER-SE>                                     223,953
<TOTAL-LIABILITY-AND-EQUITY>                   409,302
<SALES>                                        365,083
<TOTAL-REVENUES>                               365,083
<CGS>                                          267,332
<TOTAL-COSTS>                                  338,158
<OTHER-EXPENSES>                                 2,875
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               7,703
<INCOME-PRETAX>                                 16,347
<INCOME-TAX>                                     5,051
<INCOME-CONTINUING>                             11,296
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    11,296
<EPS-PRIMARY>                                      .94
<EPS-DILUTED>                                      .90
<FN>
<F1>This number does not include 51.5 million of Costs and Estimated Earnings on
Long-Term Contracts.
</FN>
        

</TABLE>


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