CRANE CO /DE/
SC 14D1, 1994-03-30
MISCELLANEOUS FABRICATED METAL PRODUCTS
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<PAGE>
- ------------------------------------------------------------
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
                                 SCHEDULE 14D-1

              TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                                      AND
                                  SCHEDULE 13D
                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 6)
                           --------------------------
                           MARK CONTROLS CORPORATION
                           (Name of Subject Company)
                           --------------------------
                            CRANE ACQUISITION CORP.
                                   CRANE CO.
                                   (Bidders)
                           --------------------------
                     COMMON STOCK, PAR VALUE $.01 PER SHARE
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                         (Title of Class of Securities)
                           --------------------------
                                  57038N-10-5
                     (CUSIP Number of Class of Securities)
                           --------------------------

                                 PAUL R. HUNDT
                                   SECRETARY
                                   CRANE CO.
                            100 FIRST STAMFORD PLACE
                               STAMFORD, CT 06902
                        TELEPHONE NUMBER (203) 363-7220
          (Name, Address and Telephone Number of Person Authorized to
            Receive Notices and Communications on Behalf of Bidders)
                           --------------------------

                                   COPIES TO:
                            Lawrence Lederman, Esq.
                        Milbank, Tweed, Hadley & McCloy
                            1 Chase Manhattan Plaza
                           Telephone: (212) 530-5754
                           --------------------------

                           CALCULATION OF FILING FEE

<TABLE>
<CAPTION>
- -----------------------------------------------------------------
- -----------------------------------------------------------------
<S>                             <C>
     TRANSACTION VALUE *             AMOUNT OF FILING FEE **
- -----------------------------------------------------------------
         $85,302,750                       $17,060.55
- -----------------------------------------------------------------
- -----------------------------------------------------------------
<FN>
 * Pursuant  to, and as provided by, Rule 0-11(d), this amount is based upon the
   purchase, at $19.50 per share, net to the seller in cash, of 4,374,500 shares
   of Common  Stock of  Mark Controls  Corporation, which  is equal  to (i)  the
   number  of Shares (5,038,310) outstanding as reported in the Annual Report on
   Form 10-K of Mark Controls Corporation  for the year ended December 31,  1993
   minus  (ii) the number of Shares (663,810) beneficially owned by Crane on the
   date hereof.
** 1/50 of 1% of Transaction Valuation
</TABLE>

/ / Check box if any  part of the fee is  offset as provided by Rule  0-11(a)(2)
  and  identify the  filing with which  the offsetting fee  was previously paid.
  Identify the previous filing by registration statement number, or the Form  or
  Schedule and the date of its filing.

  Amount Previously Paid:                                Filing Party:

  Form or Registration No.:                                Date Filed:

- ------------------------------------------------------------
- ------------------------------------------------------------
<PAGE>
                             CUSIP NO. 57038N-10-5

                                     14D-1

 1)  Name of Reporting Persons S.S. or I.R.S. Identification No. of
     Above Persons __Crane Co. I.R.S. No. 13-1952290____________________________

 2)  Check the Appropriate box if a Member of a Group (See Instructions)

    / /  (a) ___________________________________________________________________

    / /  (b) ___________________________________________________________________

 3)  SEC Use Only ______________________________________________________________

 4)  Source of Funds (See Instructions) __BK____________________________________

 5)  /X/  Check  Box if Disclosure of Legal  Proceedings is Required Pursuant to
          Items 2(e) or 2(f)

 6)  Citizenship or Place of Organization __Delaware____________________________

 7)  Aggregate Amount  Beneficially Owned  by  Each Reporting  Person  __663,810
     Common Shares_

 8)  /  /  Check Box if the Aggregate  Amount in Row (7) Excludes Certain Shares
     (See Instructions)

 9)  % of Class Represented by Amount in Row (7) __13.2%________________________

10)  Type of Reporting Person (See Instructions) __CO___________________________

                                       2
<PAGE>
                             CUSIP NO. 57038N-10-5

                                     14D-1

 1)  Name of Reporting Persons S.S. or I.R.S. Identification No. of
     Above Persons __Crane Acquisition Corp.____________________________________

 2)  Check the Appropriate Box if a Member of a Group (See Instructions)

    / /  (a) ___________________________________________________________________

    / /  (b) ___________________________________________________________________

 3)  SEC Use Only ______________________________________________________________

 4)  Source of Funds (See Instructions) __AF____________________________________

 5)  / /  Check Box if Disclosure  of Legal Proceedings is Required Pursuant  to
     Items 2(e) or 2(f)

 6)  Citizenship or Place of Organization __Delaware____________________________

 7)  Aggregate  Amount Beneficially  Owned by  Each Reporting  Person __0 Common
     Shares_____________________________________________________________________

 8)  / /  Check Box if the Aggregate Amount  in Row (7) Excludes Certain  Shares
          (See Instructions)

 9)  % of Class Represented by Amount in Row (7) __0%___________________________

10)  Type of Reporting Person (See Instructions) __CO___________________________

                                       3
<PAGE>
    This  Tender Offer Statement on Schedule 14D-1 relates to the offer by Crane
Acquisition Corp., a Delaware corporation (the "Purchaser"), and a wholly  owned
subsidiary  of  Crane Co.,  a Delaware  corporation  ("Crane"), to  purchase all
outstanding shares  of Common  Stock,  $.01 par  value  per share  (the  "Common
Stock"),  of Mark Controls Corporation,  a Delaware corporation (the "Company"),
and the associated Series  A Stock Purchase Rights  (the "Rights" and,  together
with  the Common Stock, the "Shares") at a price of $19.50 per share, net to the
seller in cash and  without interest thereon,  on the terms  and subject to  the
conditions  set forth in the Offer to Purchase, dated March 30, 1994 (the "Offer
to Purchase"), and  in the related  Letter of Transmittal,  copies of which  are
attached  hereto  as Exhibits  99.1 and  99.2, respectively  (which collectively
constitute the "Offer").

    This Statement also constitutes Amendment No. 6 to the Statement on Schedule
13D, dated January 3, 1994, filed by Crane, relating to its beneficial ownership
of Shares.

ITEM 1.  SECURITY AND SUBJECT COMPANY.

    (a) The name of the subject company is Mark Controls Corporation, a Delaware
corporation, and the  address of  its principal  executive offices  is 5215  Old
Orchard Road, Skokie, Illinois 60077.

    (b)  The exact title of  the class of equity  securities being sought in the
Offer is  Common  Stock, $.01  par  value per  share,  of the  Company  and  the
associated  Series A  Stock Purchase  Rights. The  information set  forth in the
Introduction to the Offer to Purchase is incorporated herein by reference.

    (c) The information  set forth  in Section 6  ("Price Range  of the  Shares;
Dividends") of the Offer to Purchase is incorporated herein by reference.

ITEM 2.  IDENTITY AND BACKGROUND.

    (a)-(d),  (g)   This  Statement is  filed  by the  Purchaser and  Crane. The
information set forth in  the Introduction and  Section 9 ("Certain  Information
Concerning  the  Purchaser and  Crane")  of, and  Schedule  I to,  the  Offer to
Purchase is incorporated herein by reference.

    (e)-(f)  Neither the Purchaser nor Crane nor, to their knowledge, any of the
persons listed in Schedule I to the Offer to Purchase, has during the last  five
years  (i) been convicted in a criminal proceeding (excluding traffic violations
or  similar  misdemeanors)  except:  On  March  28,  1991,  Crane  pleaded  nolo
contendere,  in  the United  States District  Court for  the Middle  District of
Georgia, Macon Division, to a  one count information to  the effect that one  of
its  divisions, since dissolved, having knowledge  of the actual commission of a
felony, to  wit,  that a  purchasing  agent of  a  customer was  attempting,  in
violation  of 26 USC Section 7201, to evade taxes on certain monies which he had
caused employees of the division  to pay him to  ensure that his employer  would
continue  to buy products from that division,  had concealed and had not as soon
as possible made known  same to some  judge or other  person in civil  authority
under  the United States,  all in violation of  18 USC Section  4, and was fined
$100,000, or  (ii)  been  a  party  to a  civil  proceeding  of  a  judicial  or
administrative body of competent jurisdiction and as a result of such proceeding
was  or  is  subject to  a  judgment,  decree or  final  order  enjoining future
violations of, or prohibiting activities subject to, federal or state securities
laws or finding any violation of such laws.

ITEM 3.  PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY.

    (a) The information set forth in Section 9 ("Certain Information  Concerning
the  Purchaser and Crane")  of the Offer  to Purchase is  incorporated herein by
reference.

    (b) The information set forth  in the Introduction, Section 10  ("Background
of  the  Offer;  Contacts  with  the  Company")  of  the  Offer  to  Purchase is
incorporated herein by reference. Except as set forth therein, since January  1,
1991  there have been  no contacts, negotiations or  transactions required to be
set forth in this item.

ITEM 4.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

    (a)-(b)  The  information set  forth in Section  12 ("Source  and Amount  of
Funds") of the Offer to Purchase is incorporated herein by reference.

                                       4
<PAGE>
    (c)  By letter dated March 30, 1994,  to the Secretary of the Securities and
Exchange Commission, Crane  and the Purchaser  requested that the  names of  the
banks  which make available the uncommitted lines of credit and the names of the
banks which have made  available the loan commitments  for the revolving  credit
facility,  each as described in Item 4(a)-(b) above not be made available to the
public.

ITEM 5.  PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER.

    (a)-(e)  The information set forth in the Introduction, Section 9  ("Certain
Information Concerning the Purchaser and Crane"), Section 10 ("Background of the
Offer; Contacts with the Company"), Section 11 ("Purpose of the Offer; Plans for
the  Company") and  Section 12 ("Source  and Amount  of Funds") of  the Offer to
Purchase are  incorporated herein  by reference.  Except as  set forth  therein,
there are no plans or proposals required to be set forth in this item.

    (f)-(g)  The information set forth in Section 7 ("Effect of the Offer on the
Market  for  the Shares;  NASDAQ  Quotation; Exchange  Act  Registration; Margin
Regulations") of the Offer to Purchase is incorporated herein by reference.

ITEM 6.  INTEREST IN SECURITIES OF THE SUBJECT COMPANY.

    (a)-(b)  The information set forth in the Introduction, Section 9  ("Certain
Information Concerning the Purchaser and Crane"), Section 10 ("Background of the
Offer;  Contacts with the Company") and Section 11 ("Purpose of the Offer; Plans
for the Company") of the Offer to Purchase is incorporated herein by reference.

ITEM 7.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
TO THE SUBJECT COMPANY'S SECURITIES.

    The  information  in  the  Introduction,  Section  9  ("Certain  Information
Concerning  the Purchaser and Crane"), Section  11 ("Purpose of the Offer; Plans
for the Company") and Section 16 ("Certain  Fees and Expenses") of the Offer  to
Purchase is incorporated herein by reference.

ITEM 8.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.

    The  information  set forth  in the  Introduction,  Section 12  ("Source and
Amount of Funds") and Section 16 ("Certain  Fees and Expenses") of the Offer  to
Purchase is incorporated herein by reference.

ITEM 9.  FINANCIAL STATEMENTS OF BIDDERS.

    The  information in Section 9 ("Certain Information Concerning the Purchaser
and Crane") of the Offer to Purchase is incorporated herein by reference.

ITEM 10.  ADDITIONAL INFORMATION.

    (a) None.

    (b)-(c)  The information  set forth in Section  15 ("Certain Legal  Matters;
Required  Regulatory Approvals") of the Offer to Purchase is incorporated herein
by reference.

    (d) The information set forth in  the Introduction, Section 6 ("Price  Range
of  the Shares; Dividends"), Section  7 ("Effect of the  Offer on the Market for
the Shares; NASDAQ Quotation;  Exchange Act Registration; Margin  Regulations"),
Section  12  ("Source  and Amount  of  Funds")  and Section  15  ("Certain Legal
Matters;  Required  Regulatory   Approvals")  of  the   Offer  to  Purchase   is
incorporated herein by reference.

    (e)  The  information  set  forth in  Section  15  ("Certain  Legal Matters;
Required Regulatory Approvals") of the Offer to Purchase is incorporated  herein
by reference.

    (f)  The information set  forth in the  Offer to Purchase  and the Letter of
Transmittal, copies of  which are  attached hereto  as Exhibits  99.1 and  99.2,
respectively, is incorporated herein by reference.

                                       5
<PAGE>
ITEM 11.  MATERIAL TO BE FILED AS EXHIBITS.

<TABLE>
<S>   <C>   <C>  <C>
(a)   99.1  --   Offer to Purchase, dated March 30, 1994.
      99.2  --   Letter of Transmittal.
      99.3  --   Notice of Guaranteed Delivery.
      99.4  --   Letter from the Information Agent to Brokers, Dealers,
                  Commercial Banks, Trust Companies and Other Nominees.
      99.5  --   Letter to Clients for use by Brokers, Dealers, Commercial
                  Banks, Trust Companies and Other Nominees.
      99.6  --   Guidelines for Certification of Taxpayer Identification
                  Number on Substitute Form W-9.
      99.7  --   Text of Press Release issued by Crane, dated March 30, 1994.
      99.8  --   Summary Advertisement as published in THE NEW YORK TIMES on
                  March 30, 1994.
      99.9  --   Notices of Withdrawal.
</TABLE>

<TABLE>
<S>   <C>  <C>
(b)   --   Commitment letters with respect to the $100 million
            aggregate principal amount three year revolving credit
            facility to be filed by Amendment No. 1. See Item 4(c).
(c)   --   Not applicable.
(d)   --   Not applicable.
(e)   --   Not applicable.
(f)   --   Not applicable.
</TABLE>

                                       6
<PAGE>
                                   SIGNATURE

    After  due  inquiry and  to  the best  of  their knowledge  and  belief, the
undersigned certify that the  information set forth in  this statement is  true,
complete and correct.

                                          CRANE ACQUISITION CORP.

                                          By: /s/ Paul R. Hundt
                                             -----------------------------------
                                             Name: Paul R. Hundt
                                             Title:  Vice President

Dated: March 30, 1994

                                          CRANE CO.

                                          By: /s/ Paul R. Hundt
                                            ------------------------------------
                                            Name: Paul R. Hundt
                                            Title:  Vice President

Dated: March 30, 1994

                                       7
<PAGE>
                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
                                                                        PAGE
EXHIBIT                                                                 NO.
- --------                                                                ---
<S>       <C>                                                           <C>
  99.1    Offer to Purchase, dated March 30, 1994
  99.2    Letter of Transmittal
  99.3    Notice of Guaranteed Delivery
  99.4    Letter from the Information Agent to Brokers, Dealers,
           Commercial Banks, Trust Companies and Other Nominees
  99.5    Letter to Clients for use by Brokers, Dealers, Commercial
           Banks, Trust Companies and Other Nominees
  99.6    Guidelines for Certification of Taxpayer Identification
           Number on Substitute Form W-9
  99.7    Text of Press Release issued by Crane, dated March 30, 1994
  99.8    Summary Advertisement as published in THE NEW YORK TIMES on
           March 30, 1994
  99.9    Notices of Withdrawal
</TABLE>

                                       8

<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                            CRANE ACQUISITION CORP.,
                          A WHOLLY OWNED SUBSIDIARY OF
                                   CRANE CO.
                                   ----------

    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON APRIL 26, 1994, UNLESS THE OFFER IS EXTENDED.
                            ------------------------

    THE  OFFER  IS CONDITIONED  UPON, AMONG  OTHER  THINGS, THERE  BEING VALIDLY
TENDERED AND NOT WITHDRAWN  PRIOR TO THE EXPIRATION  DATE THAT NUMBER OF  SHARES
WHICH,  TOGETHER WITH  THE SHARES  BENEFICIALLY OWNED  BY THE  PURCHASER AND ITS
AFFILIATES, REPRESENTS AT LEAST A MAJORITY OF THE SHARES OUTSTANDING ON A  FULLY
DILUTED BASIS ON THE DATE OF PURCHASE. CRANE NOW OWNS APPROXIMATELY 13.2% OF THE
OUTSTANDING SHARES OF THE COMPANY. SEE SECTIONS 14 AND 15.
                            ------------------------

                                   IMPORTANT

    Any  stockholder desiring  to tender Shares  should either  (a) complete and
sign the Letter of Transmittal (or  a facsimile thereof) in accordance with  the
instructions  in the Letter of Transmittal and  mail or deliver it together with
the certificate(s) representing tendered Shares and any other required documents
to the Depositary or tender such Shares pursuant to the procedure for book-entry
transfer set  forth in  Section 3  or (b)  request his  or her  broker,  dealer,
commercial  bank, trust company  or other nominee to  effect the transaction for
him or her. A stockholder whose Shares  are registered in the name of a  broker,
dealer,  commercial  bank,  trust company  or  other nominee  must  contact such
broker, dealer, commercial  bank, trust company  or other nominee  if he or  she
desires to tender such Shares.

    A stockholder who desires to tender his or her Shares and whose certificates
representing such Shares are not immediately available or who cannot comply with
the  procedures for book-entry transfer on a timely basis may tender such Shares
by following the procedures for guaranteed delivery set forth in Section 3.

    Questions and requests  for assistance  may be directed  to the  Information
Agent  at its address and  telephone number set forth on  the back cover of this
Offer to Purchase. Additional  copies of this Offer  to Purchase, the Letter  of
Transmittal,  the Notice of Guaranteed Delivery  and other related materials may
be obtained  from the  Information Agent  or from  brokers, dealers,  commercial
banks and trust companies.
                            ------------------------

                    The Information Agent for the Offer is:
                           Beacon Hill Partners, Inc.
                            ------------------------

March 30, 1994
<PAGE>
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                    Page
                                                                                                                  ---------
<S>        <C>                                                                                                    <C>
INTRODUCTION....................................................................................................          3
 1.        Terms of the Offer...................................................................................          5
 2.        Acceptance for Payment and Payment...................................................................          7
 3.        Procedures for Accepting the Offer and Tendering Shares..............................................          8
 4.        Withdrawal Rights....................................................................................         11
 5.        Certain Tax Consequences.............................................................................         12
 6.        Price Range of the Shares; Dividends.................................................................         12
 7.        Effect of the Offer on the Market for the Shares; NASDAQ Quotation; Exchange Act Registration; Margin
            Regulations.........................................................................................         14
 8.        Certain Information Concerning the Company...........................................................         15
 9.        Certain Information Concerning the Purchaser and Crane...............................................         17
10.        Background of the Offer; Contacts with the Company...................................................         19
11.        Purpose of the Offer; Plans for the Company; Other Matters Relating to the Offer and the Proposed
            Merger..............................................................................................         24
12.        Source and Amount of Funds...........................................................................         31
13.        Dividends and Distributions..........................................................................         31
14.        Certain Conditions of the Offer......................................................................         32
15.        Certain Legal Matters; Required Regulatory Approvals.................................................         36
16.        Certain Fees and Expenses............................................................................         38
17.        Miscellaneous........................................................................................         38
Schedule I -- Directors and Executive Officers of Crane and Purchaser
</TABLE>

                                       2
<PAGE>
TO:    ALL HOLDERS OF COMMON STOCK OF
      MARK CONTROLS CORPORATION:

                                  INTRODUCTION

THE OFFER

    Crane  Acquisition  Corp., a  Delaware corporation  (the "Purchaser")  and a
wholly owned subsidiary of Crane  Co., a Delaware corporation ("Crane"),  hereby
offers  to purchase all outstanding  shares of Common Stock,  par value $.01 per
share (the "Common Stock"), of Mark Controls Corporation, a Delaware corporation
(the "Company"), and the associated Series A Stock Purchase Rights (the "Rights"
and, together with the Common Stock, the "Shares") issued pursuant to the Rights
Agreement dated as of August 7, 1989, between the Company and Continental  Bank,
N.A.  as Rights Agent (the "Rights Agreement"),  at a price of $19.50 per Share,
net to the seller in cash without interest thereon (the "Offer Price"), upon the
terms and subject to the conditions set  forth in this Offer to Purchase and  in
the related Letter of Transmittal (which together constitute the "Offer").

    Tendering  stockholders  will  not be  obligated  to pay  brokerage  fees or
commissions or,  except  as  set  forth  in  Instruction  6  of  the  Letter  of
Transmittal,  stock transfer  taxes on  the purchase  of Shares  pursuant to the
Offer. The Purchaser will pay all charges and expenses of The Bank of New  York,
as Depositary (the "Depositary"), and Beacon Hill Partners, Inc., as Information
Agent  (the "Information  Agent"), incurred  in connection  with the  Offer. See
Section 16.

    The purpose of the Offer is for Crane, through the Purchaser, to acquire the
entire equity interest in the Company. Crane already owns approximately 13.2% of
the  outstanding  Shares.  Crane  currently  intends,  as  soon  as  practicable
following consummation of the Offer, to propose and seek to have the Company, if
it  is then legally and contractually permitted to do so, consummate a merger or
similar business combination with  the Purchaser or  another direct or  indirect
wholly owned subsidiary of Crane (the "Proposed Merger"), pursuant to which each
then  outstanding Share (other than Shares owned  by the Purchaser, Crane or any
of their affiliates,  Shares held  in the treasury  of the  Company, and  Shares
owned  by  stockholders who  perfect any  available  appraisal rights  under the
Delaware General Corporation Law (the  "Delaware Law")) would be converted  into
the  right  to receive  an amount  in cash  equal  to the  price per  Share paid
pursuant to the Offer. See Section 11.

    THE OFFER  IS  SUBJECT TO  THE  FULFILLMENT OF  CONDITIONS  DESCRIBED  UNDER
"CONDITIONS TO THE OFFER" BELOW AND IN SECTION 14.

    The  Offer will expire  at 12:00 Midnight,  New York City  time, on Tuesday,
April 26, 1994, unless extended.

    Unless certificates with respect to  the Rights ("Rights Certificates")  are
issued, a tender of Shares pursuant to the Offer will constitute a tender of the
associated Rights, evidenced by the certificates for such Shares.

    The  Offer does not constitute a solicitation  of proxies for any meeting of
the Company's stockholders. Any such  solicitation which the Purchaser or  Crane
might  make would  be made only  pursuant to separate  proxy materials complying
with the requirements of Section 14(a)  of the Securities Exchange Act of  1934,
as amended (the "Exchange Act").

SUMMARY BACKGROUND OF THE OFFER

    During  the Spring  of 1993, Crane  purchased an  aggregate of approximately
4.3% of the then outstanding Shares,  and on December 23, 1993, Crane  purchased
in   a  single  transaction  sufficient  Shares  to  increase  its  holdings  to
approximately 13.2%  of  the  outstanding  Shares. On  January  3,  1994,  Crane
announced  that it had  acquired approximately 13.2%  of the Shares  and that it
intended to purchase additional Shares and possibly formulate a plan to  acquire
control  of the Company. On January 17, 1994, the Chairman of Crane met with the
President and Chief  Executive Officer of  the Company and  proposed that  Crane
acquire   the   Company   by   means   of  a   merger   in   which   each  Share

                                       3
<PAGE>
would be exchanged for $13 in cash.  Crane made clear that it would be  prepared
to  increase the  proposed price  per Share  if an  increase was  justified by a
review  of  non-public  information  concerning  the  Company.  On  January   26
representatives  of Crane and  the Company met  and discussed publicly available
information about the Company. The Company issued a press release on January  31
to  the effect that several companies  including Crane had expressed an interest
in acquiring all or part  of the Company. The  press release announced that  the
Company  had hired an investment banking firm to assist in exploring how to best
pursue maximizing  stockholder value  in light  of the  interest that  had  been
expressed  in the Company.  On February 11 Crane  entered into a confidentiality
agreement with the  Company and  was provided access  to non-public  information
about  the Company. Crane and its advisers  engaged in a due diligence review of
the Company. On March 9  the Company invited a  "small group of final  bidders",
including  Crane, to  submit prior to  5:00 p.m. on  March 14 a  "best and final
proposal" to acquire the Company. Crane did not submit a proposal in  accordance
with  the Company's  invitation. Instead, on  March 14  Crane publicly announced
that it was prepared to increase from $13 to $15.50 the cash price per Share  to
be paid by Crane to acquire the Company in a merger transaction. On March 16 the
Company  announced that it had reached  agreement (the "Danaher Agreement") with
Danaher Corporation ("Danaher")  for the  sale of the  Company to  Danaher in  a
merger  transaction at  a price of  $17.75 per Share  in cash. On  March 19 Tyco
International Ltd. ("Tyco") informed the Company by letter that it was  prepared
to  pay $19 per Share in cash for all outstanding Shares in a merger transaction
and it would enter into definitive agreements similar to the Danaher  Agreement.
On March 22 Danaher commenced a tender offer for the Shares (the "Danaher Tender
Offer") at a price of $17.75 per Share in accordance with the Danaher Agreement.
On  March 24,  1994, Tyco  commenced a  tender offer  for the  Shares (the "Tyco
Tender Offer") at a price of $19 per Share. On March 30 the Purchaser  commenced
its Offer at a price of $19.50 per Share.

    The  foregoing  summary  is  not  complete  and  is  qualified  by  the full
discussion of the background of the Offer in Section 10.

CONDITIONS TO THE OFFER

    The Offer  is subject  to the  fulfillment of  the conditions  described  in
Section 14, including the following:

    MINIMUM   NUMBER  OF  SHARES  CONDITION.    CONSUMMATION  OF  THE  OFFER  IS
CONDITIONED UPON THERE  BEING VALIDLY TENDERED  AND NOT WITHDRAWN  PRIOR TO  THE
EXPIRATION  DATE (AS DEFINED IN SECTION 1) THAT NUMBER OF SHARES WHICH, TOGETHER
WITH  THE  SHARES  BENEFICIALLY  OWNED  BY  THE  PURCHASER  OR  ITS  AFFILIATES,
REPRESENTS  AT LEAST A MAJORITY  (THE "MINIMUM NUMBER OF  SHARES") OF THE SHARES
OUTSTANDING ON  A FULLY  DILUTED BASIS  ON THE  DATE OF  PURCHASE (THE  "MINIMUM
NUMBER OF SHARES CONDITION").

    According to information furnished by the Company to Danaher, as of February
28,  1994, there were 5,038,310 Shares outstanding  and there were not more than
298,130 Shares subject to issuance pursuant to stock options under the Company's
stock option plans.  For purposes of  the Offer, "fully  diluted basis"  assumes
there  is  no  dilution  on account  of  the  Rights and  assumes  that  all the
outstanding stock options have been  exercised. Crane beneficially owns  663,810
Shares  on the date  hereof, which represents approximately  12.5% of the Shares
outstanding on a fully diluted basis and 13.2% of the Shares on a primary basis.
Based on the foregoing and assuming no additional Shares or options have been or
will be  issued after  February 28,  1994  (other than  Shares issued  upon  the
exercise  of options referred to above),  the Minimum Number of Shares Condition
would be satisfied if at least 2,004,411 Shares are validly tendered pursuant to
the Offer and not withdrawn.

    213,300 of  the Shares  owned by  Crane were  acquired by  Crane during  the
Spring of 1993. On December 23, 1993, Crane purchased 450,510 Shares in a single
open  market transaction at $8.63 per share. Crane has filed with the Commission
a Schedule  13D  and amendments  thereto  containing detailed  information  with
respect  to its ownership of Shares. Copies  of such Schedule 13D and amendments
thereto should be available for inspection  at the Commission in the manner  set
forth  in Section 8  with respect to information  concerning the Company, except
that they will not be available at the regional offices of the Commission.

                                       4
<PAGE>
    RIGHTS CONDITION AND SECTION  203 CONDITION.  CONSUMMATION  OF THE OFFER  IS
ALSO  CONDITIONED  UPON (A)  THE RIGHTS  HAVING  BEEN REDEEMED  BY THE  BOARD OF
DIRECTORS OF  THE  COMPANY  OR  THE  PURCHASER  BEING  SATISFIED,  IN  ITS  SOLE
DISCRETION,  THAT THE RIGHTS HAVE BEEN INVALIDATED OR ARE OTHERWISE INAPPLICABLE
TO THE  OFFER AND  THE PROPOSED  MERGER  (THE "RIGHTS  CONDITION") AND  (B)  THE
PURCHASER HAVING BEEN SATISFIED, IN ITS SOLE DISCRETION, THAT SECTION 203 OF THE
DELAWARE  LAW IS INAPPLICABLE TO THE PURCHASER  IN CONNECTION WITH THE OFFER AND
THE PROPOSED MERGER (THE "SECTION 203 CONDITION").

    The Rights and Section 203 of the Delaware Law are summarized in Section 11.
The Purchaser believes that the Rights  Condition and the Section 203  Condition
will  be satisfied. By  letter dated March  22, 1994, the  Company informed Tyco
that its Board of Directors had on that date "resolved that if Tyco initiates an
all-cash all-Shares tender offer at $19 per  Share or higher on or before  April
4, 1994, then (i) that tender offer and any merger which shall follow within six
months  after conclusion of  the Offer providing  remaining stockholders with at
least the same consideration per share  as the consideration paid in the  tender
offer  will be  deemed to have  been approved by  the Board today  to the extent
necessary so  that  the  provisions  of Section  203  of  the  Delaware  General
Corporation Law will not apply to that merger and (ii) neither that tender offer
nor  such merger will cause Mark  Controls' outstanding stock purchase rights to
become exercisable."  Tyco  did commence  a  tender offer  complying  with  such
parameters  on  March  24,  1994. Purchaser's  Offer  also  complies  with those
parameters, and Purchaser  believes that  the Company must  accord to  Purchaser
essentially  the same treatment as that accorded Tyco with respect to the Rights
and application of Section 203. In addition, Purchaser believes that Section 203
is inapplicable  to Purchaser  in connection  with the  Offer and  the  Proposed
Merger because of the Company's approval of the Danaher Agreement.

    Certain  other  conditions to  the Offer  are described  in Section  14. The
Purchaser expressly  reserves  the  right  to  waive any  one  or  more  of  the
conditions to the Offer. See Sections 14 and 15.

    THIS  OFFER  TO PURCHASE  AND THE  LETTER  OF TRANSMITTAL  CONTAIN IMPORTANT
INFORMATION WHICH SHOULD  BE READ  CAREFULLY BEFORE  ANY DECISION  IS MADE  WITH
RESPECT TO THE OFFER.

                                THE TENDER OFFER

    1.  TERMS OF THE OFFER.  Upon the terms and subject to the conditions of the
Offer  (including, if the Offer is extended or amended, the terms and conditions
of any such extension or amendment),  the Purchaser will accept for payment  and
thereby  purchase all  Shares validly tendered  and not  withdrawn in accordance
with the procedures set forth  in Section 4 on or  prior to the Expiration  Date
(as  hereinafter defined). The term "Expiration  Date" means 12:00 Midnight, New
York City time, on April 26, 1994,  unless and until the Purchaser, in its  sole
discretion,  shall have extended the period of time for which the Offer is open,
in which event the term "Expiration Date" shall mean the latest time and date at
which the Offer, as so extended by the Purchaser, shall expire.

    The Purchaser expressly reserves the right,  in its sole discretion, at  any
time  and from time to time, to extend the period during which the Offer is open
for any reason, including the occurrence  of any of the conditions specified  in
Section  14,  by  giving  oral  or  written  notice  of  such  extension  to the
Depositary. During any such  extension, all Shares  previously tendered and  not
withdrawn  will  remain subject  to  the Offer  and subject  to  the right  of a
tendering stockholder to withdraw such stockholder's Shares. See Section 4.

    Subject to the applicable regulations of the Commission, the Purchaser  also
expressly  reserves the right, in its sole  discretion, at any time or from time
to time, to (i) delay acceptance for  payment of or, regardless of whether  such
Shares  were theretofore  accepted for payment,  payment for  any Shares pending
receipt of any  regulatory or  governmental approvals specified  in Section  15,
(ii)  terminate  the Offer  (whether  or not  any  Shares have  theretofore been
accepted for  payment) and  not accept  for payment  any Shares  if any  of  the
conditions  referred  to  in Section  14  has  not been  satisfied  or  upon the
occurrence of any of the conditions specified in Section 14 and (iii) waive  any
condition or otherwise

                                       5
<PAGE>
amend  the Offer in any respect, in each  case, by giving oral or written notice
of such delay, termination, waiver or amendment to the Depositary and by  making
a public announcement thereof. The Purchaser acknowledges (i) that Rule 14e-1(c)
under  the Exchange Act requires the  Purchaser to pay the consideration offered
or return the Shares  tendered promptly after the  termination or withdrawal  of
the  Offer and (ii) that the Purchaser  may not delay acceptance for payment of,
or payment for (except as provided in clause (i) of the preceding sentence), any
Shares upon the  occurrence of  any of the  conditions specified  in Section  14
without extending the period of time during which the Offer is open.

    Any such extension, delay, termination, waiver or amendment will be followed
as promptly as practicable by public announcement thereof, and such announcement
in  the case of an extension will be made no later than 9:00 A.M., New York City
time, on the next business day  after the previously scheduled Expiration  Date.
Without limiting the manner in which the Purchaser may choose to make any public
announcement,  subject to applicable law  (including Rules 14d-4(c) and 14d-6(d)
under the  Exchange  Act,  which  require  that  material  changes  be  promptly
disseminated  to holders of  Shares), the Purchaser shall  have no obligation to
publish, advertise or otherwise communicate  any such public announcement  other
than by issuing a release to the Dow Jones News Service.

    If the Purchaser makes a material change in the terms of the Offer, or if it
waives a material condition of the Offer, the Purchaser will extend the Offer to
the  extent required by Rules 14d-4(c) and  14d-6(d) under the Exchange Act. The
minimum period during which an offer must remain open following material changes
in the  terms  of the  offer,  other than  a  change in  price  or a  change  in
percentage of securities sought or a change in any dealer's soliciting fee, will
depend  upon  the  facts and  circumstances,  including the  materiality  of the
changes. With  respect  to a  change  in price  or  a change  in  percentage  of
securities  sought or  a change  in any dealer's  soliciting fee,  a minimum ten
business day period from the date of such change is generally required to  allow
for  adequate  dissemination  to  stockholders.  Accordingly,  if  prior  to the
Expiration Date,  the  Purchaser should  decrease  the number  of  Shares  being
sought, or increase or decrease the consideration offered pursuant to the Offer,
and  if the  Offer is scheduled  to expire at  any time earlier  than the period
ending on the tenth business day from and including the date that notice of such
increase or decrease is first published, sent or given to holders of Shares, the
Offer will be extended at  least until the expiration  of such ten business  day
period.  For purposes of the Offer, a "business  day" means any day other than a
Saturday, Sunday or a federal holiday and consists of the time period from 12:01
A.M. through 12:00 Midnight, New York City time.

    THE OFFER IS CONDITIONED UPON, AMONG  OTHER THINGS, THE SATISFACTION OF  THE
MINIMUM  NUMBER OF SHARES CONDITION. SEE  SECTION 14. The Purchaser reserves the
right (but shall  not be  obligated), in  accordance with  applicable rules  and
regulations  of the Commission, to waive or  reduce the Minimum Number of Shares
Condition and to accept for payment pursuant to the Offer less than the  Minimum
Number  of Shares.  The Purchaser  has no  present intention  of exercising such
right. The Commission has stated that in its view an offer must remain open  for
a  minimum period of time following a material  change in the terms of the offer
and that  the  waiver of  a  condition such  as  the Minimum  Number  of  Shares
Condition  is a material  change in the  terms of an  offer. In the Commission's
view, an offer should remain open for  a minimum of five business days from  the
date the material change is first published, sent or given to holders of Shares,
and  that  if  material  changes  are  made  with  respect  to  information that
approaches the significance of price and share levels, a minimum of ten business
days may be required to allow for adequate dissemination and investor  response.
If,  by the Expiration Date, the Minimum Number of Shares Condition has not been
satisfied, the Purchaser may,  in its sole discretion,  elect to (i) extend  the
Offer  and, subject to applicable withdrawal  rights, retain all tendered Shares
until the expiration  of the Offer,  as extended,  subject to the  terms of  the
Offer,  (ii) subject to  complying with applicable rules  and regulations of the
Commission, accept for payment all Shares  so tendered and not extend the  Offer
or  (iii) terminate the Offer  and not accept for  payment any shares and return
all tendered Shares to tendering stockholders.

                                       6
<PAGE>
    A request  is being  made  to the  Company pursuant  to  Rule 14d-5  of  the
Exchange Act for the use of the Company's stockholder list and security position
listings  for the purpose of disseminating the  Offer to holders of Shares. Upon
compliance by the Company with  such request or the  election by the Company  to
disseminate  the Offer  in lieu  of complying with  such request,  this Offer to
Purchase and the related Letter of Transmittal and, if required, other  relevant
materials  will be mailed to  record holders of Shares  and will be furnished to
brokers, dealers, commercial  banks, trust companies  and similar persons  whose
names,  or the names  of whose nominees,  appear on the  stockholder list or, if
applicable, who  are listed  as  participants in  a clearing  agency's  security
position listing, for subsequent transmittal to beneficial owners of Shares.

    2.   ACCEPTANCE FOR PAYMENT AND PAYMENT.   Upon the terms and subject to the
conditions of the  Offer (including, if  the Offer is  extended or amended,  the
terms and conditions of the Offer as so extended or amended), the Purchaser will
purchase, by accepting for payment, and will pay for all Shares validly tendered
and  not withdrawn  (as permitted  by Section  4) prior  to the  Expiration Date
promptly after  the later  to occur  of (i)  the Expiration  Date and  (ii)  the
satisfaction  or waiver of the conditions to  the Offer set forth in Section 14.
In addition,  subject  to applicable  rules  of the  Commission,  the  Purchaser
expressly reserves the right to delay acceptance for payment of, or payment for,
Shares  pending receipt of any regulatory or governmental approvals specified in
Section 15.  Any determination  concerning the  satisfaction of  such terms  and
conditions shall be within the sole discretion of the Purchaser. See Section 14.
For  information with respect to approvals required prior to the consummation of
the Offer under  the Hart-Scott-Rodino  Antitrust Improvements Act  of 1976,  as
amended (the "HSR Act"), and certain other regulatory approvals, see Section 15.

    In  all cases, payment  for Shares purchased  pursuant to the  Offer will be
made only after timely receipt by  the Depositary of (i) Share Certificates  for
such  Shares or  timely confirmation of  the book-entry  transfer (a "Book-Entry
Confirmation") of such Shares  into the Depositary's  account at the  Depository
Trust  Company,  the  Midwest  Securities  Trust  Company  or  the  Philadelphia
Depository Trust Company (collectively,  the "Book-Entry Transfer  Facilities"),
pursuant  to  the  procedures  set  forth  in  Section  3,  (ii)  the  Letter of
Transmittal (or a facsimile thereof) properly completed and duly executed,  with
any  required signature guarantees, or an  Agent's Message (as defined below) in
connection with a book-entry transfer, and (iii) any other documents required by
the Letter of Transmittal.

    The term  "Agent's Message"  means a  message, transmitted  by a  Book-Entry
Transfer  Facility to, and received  by, the Depositary and  forming a part of a
Book-Entry Confirmation, which states that such Book-Entry Transfer Facility has
received an  express  acknowledgment from  the  participant in  such  Book-Entry
Transfer  Facility tendering the Shares which are the subject of such Book-Entry
Confirmation, that such participant has received  and agrees to be bound by  the
terms  of the  Letter of  Transmittal and  that the  Purchaser may  enforce such
agreement against such participant.

    For purposes of the Offer, the Purchaser will be deemed to have accepted for
payment, and thereby purchased, Shares validly tendered and not withdrawn as, if
and when the Purchaser  gives oral or  written notice to  the Depositary of  the
Purchaser's  acceptance of such Shares for payment pursuant to the Offer. In all
cases, upon the terms and  subject to the conditions  of the Offer, payment  for
Shares  purchased pursuant to the Offer will  be made by deposit of the purchase
price therefor  with the  Depositary,  which will  act  as agent  for  tendering
stockholders  for  the  purpose  of receiving  payment  from  the  Purchaser and
transmitting payment to validly  tendering stockholders. UNDER NO  CIRCUMSTANCES
WILL  INTEREST ON  THE PURCHASE  PRICE FOR  SHARES BE  PAID BY  THE PURCHASER BY
REASON OF ANY DELAY IN MAKING SUCH  PAYMENT. Upon the deposit of funds with  the
Depositary for the purpose of making payments to validly tendering stockholders,
the  Purchaser's obligation  to make  such payment  shall be  satisfied and such
tendering stockholders must thereafter look solely to the Depositary for payment
of the amounts owed to  them by reason of the  acceptance for payment of  Shares
pursuant  to the Offer. The Purchaser will pay any stock transfer taxes incident
to the transfer  of validly  tendered Shares,  except as  otherwise provided  in
Instruction  6 of the Letter of Transmittal, as well as any charges and expenses
of the Depositary and the Information Agent.

                                       7
<PAGE>
    If any  tendered Shares  are not  purchased pursuant  to the  Offer for  any
reason, or if Share Certificates are submitted representing more Shares than are
tendered,  Share Certificates representing unpurchased or untendered Shares will
be returned, without expense  to the tendering stockholder  (or, in the case  of
Shares delivered by book-entry transfer into the Depositary's account at a Book-
Entry  Transfer Facility pursuant to the procedures set forth in Section 3, such
Shares will be credited to an account maintained within such Book-Entry Transfer
Facility), as promptly as practicable  following the expiration, termination  or
withdrawal of the Offer.

    If,  prior  to  the  Expiration  Date,  the  Purchaser  shall  increase  the
consideration offered to holders of Shares pursuant to the Offer, such increased
consideration shall be paid to all holders of Shares that are purchased pursuant
to the Offer, whether or not such Shares were tendered prior to such increase in
consideration.

    The Purchaser reserves  the right to  transfer or assign,  in whole or  from
time  to time in part, to one or  more of Crane's subsidiaries or affiliates the
right to purchase Shares tendered pursuant  to the Offer, but any such  transfer
or  assignment will not relieve the Purchaser of its obligations under the Offer
or prejudice the rights of tendering stockholders to receive payment for  Shares
validly tendered and accepted for payment pursuant to the Offer.

    3.  PROCEDURES FOR ACCEPTING THE OFFER AND TENDERING SHARES.

VALID TENDER OF SHARES

    Except  as  set forth  below, in  order  for Shares  to be  validly tendered
pursuant to  the Offer,  the Letter  of Transmittal  (or a  facsimile  thereof),
properly  completed  and duly  executed,  together with  any  required signature
guarantees, or an Agent's  Message in connection with  a book-entry delivery  of
Shares,  and any other documents required by  the Letter of Transmittal, must be
received by the Depositary at one of  its addresses set forth on the back  cover
of  this Offer  to Purchase  on or  prior to  the Expiration  Date. In addition,
either (i) Share Certificates representing  tendered Shares must be received  by
the  Depositary along  with the  Letter of Transmittal,  or (ii)  Shares must be
tendered pursuant to the procedure for book-entry transfer set forth below and a
Book-Entry Confirmation must be received by  the Depositary, in each case on  or
prior  to the  Expiration Date, or  (iii) the tendering  stockholder must comply
with the guaranteed delivery procedures set forth below.

    To be assured of participation in the Offer, stockholders who have  tendered
Shares pursuant to either the Danaher Tender Offer or the Tyco Tender Offer must
withdraw  their  Shares and  tender  them to  the  Purchaser. Included  with the
materials accompanying this Offer  to Purchase are  Notices of Withdrawal  which
may  be used to withdraw Shares tendered pursuant to the Danaher Tender Offer or
the Tyco Tender Offer. Stockholders who desire assistance in withdrawing  Shares
may  contact the Information Agent at the address and telephone number set forth
on the back cover of this Offer to Purchase.

    THE METHOD OF DELIVERY  OF SHARES, THE LETTER  OF TRANSMITTAL AND ALL  OTHER
REQUIRED DOCUMENTS, INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY,
IS  AT THE OPTION AND  SOLE RISK OF THE  TENDERING STOCKHOLDER, AND THE DELIVERY
WILL BE DEEMED MADE ONLY WHEN  ACTUALLY RECEIVED BY THE DEPOSITARY. IF  DELIVERY
IS  BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS
RECOMMENDED. IN ALL CASES,  SUFFICIENT TIME SHOULD BE  ALLOWED TO ENSURE  TIMELY
DELIVERY.

    If  the Separation Date (defined  in Section 11) with  respect to the Rights
does not  occur prior  to the  Expiration Date,  a tender  of Shares  will  also
constitute  a tender of the associated Rights. If the Separation Date occurs and
Rights Certificates are  distributed by  the Company  to holders  of the  Shares
prior to the time a holder's Shares are tendered pursuant to the Offer, in order
for  Rights  (and  the  corresponding Shares)  to  be  validly  tendered, Rights
Certificates representing  a number  of Rights  equal to  the number  of  Shares
tendered  must be  delivered to  the Depositary  or, if  available, a book-entry
confirmation must be  received by the  Depositary with respect  thereto. If  the
Separation  Date occurs and Rights Certificates are not distributed prior to the
time Shares are tendered pursuant to the Offer, Rights may be tendered prior  to
a    stockholder    receiving    Rights    Certificates    by    use    of   the

                                       8
<PAGE>
guaranteed delivery procedures described below. In any case, a tender of  Shares
constitutes  an  agreement  by  the  tendering  stockholder  to  deliver  Rights
Certificates representing  a number  of Rights  equal to  the number  of  Shares
tendered pursuant to the Offer to the Depositary within five business days after
the  date Rights  Certificates are  distributed. If  the Separation  Date occurs
prior to the Expiration Date, the  Purchaser reserves the right to require  that
the  Depositary receive  Rights Certificates,  or a  book-entry confirmation, if
available, with respect to  such Rights, prior to  accepting the related  Shares
for payment pursuant to the Offer.

BOOK-ENTRY TRANSFER

    The Depositary will make a request to establish accounts with respect to the
Shares  at each of the Book-Entry Transfer  Facilities for purposes of the Offer
within two business days after the date of this Offer to Purchase. Any financial
institution that  is a  participant in  the system  of any  Book-Entry  Transfer
Facility  may  make book-entry  delivery of  Shares  by causing  such Book-Entry
Transfer Facility to transfer such Shares into the Depositary's account at  such
Book-Entry  Transfer  Facility  in  accordance  with  such  Book-Entry  Transfer
Facility's procedures for  such transfer. However,  although delivery of  Shares
may  be effected through book-entry transfer  into the Depositary's account at a
Book-Entry  Transfer  Facility,  the  Letter  of  Transmittal  (or  a  facsimile
thereof),  properly  completed and  duly executed,  with any  required signature
guarantees, or an Agent's Message in connection with a book-entry transfer,  and
any  other required documents must, in any  case, be transmitted to and received
by, the Depositary at one of its addresses  set forth on the back cover of  this
Offer to Purchase on or prior to the Expiration Date, or the guaranteed delivery
procedure set forth below must be complied with.

    DELIVERY  OF DOCUMENTS TO A BOOK-ENTRY  TRANSFER FACILITY IN ACCORDANCE WITH
SUCH BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES  DOES NOT CONSTITUTE DELIVERY  TO
THE DEPOSITARY.

SIGNATURE GUARANTEES

    Signatures  on all Letters of Transmittal must  be guaranteed by a firm that
is a bank,  broker, dealer, credit  union, savings association  or other  entity
which  is a member in good standing of the Securities Transfer Agent's Medallion
Program (an  "Eligible Institution"),  unless the  Shares tendered  thereby  are
tendered  (i) by a registered holder of  Shares who has not completed either the
box labeled "Special Payment Instructions" or the box labeled "Special  Delivery
Instructions"  on  the Letter  of  Transmittal or  (ii)  for the  account  of an
Eligible Institution. See Instruction 1 of the Letter of Transmittal.

    If the Share Certificates are registered in the name of a person other  than
the  signer of the  Letter of Transmittal,  or if payment  is to be  made to, or
Share Certificates for  unpurchased Shares  are to be  issued or  returned to  a
person  other than the registered holder, then the tendered certificates must be
endorsed or accompanied  by duly executed  stock powers, signed  exactly as  the
name  or names of the  registered holder or holders  appear on the certificates,
with the  signatures  on the  certificates  or  stock powers  guaranteed  by  an
Eligible  Institution as provided in the Letter of Transmittal. See Instructions
1 and 5 of the Letter of Transmittal.

    If the  Share Certificates  are forwarded  separately to  the Depositary,  a
properly  completed  and duly  executed Letter  of  Transmittal (or  a facsimile
thereof) must accompany each such delivery.

GUARANTEED DELIVERY

    If a stockholder  desires to tender  Shares pursuant to  the Offer and  such
stockholder's  Share Certificates are not immediately available or time will not
permit all  required  documents to  reach  the Depositary  on  or prior  to  the
Expiration Date, or the procedure for book-entry transfer cannot be completed on
a timely basis, such Shares may nevertheless be tendered if all of the following
guaranteed delivery procedures are duly complied with:

        (i) such tender is made by or through an Eligible Institution;

                                       9
<PAGE>
        (ii)  a  properly  completed  and  duly  executed  Notice  of Guaranteed
    Delivery, substantially in the form  provided by the Purchaser, is  received
    by  the Depositary, as provided  below, on or prior  to the Expiration Date;
    and

       (iii) the Share Certificates (or a Book-Entry Confirmation)  representing
    all  tendered Shares, in  proper form for transfer  together with a properly
    completed and duly executed Letter of Transmittal (or a facsimile  thereof),
    with  any required  signature guarantees  (or, in  the case  of a book-entry
    transfer, an Agent's Message) and any other documents required by the Letter
    of  Transmittal  are  received  by  the  Depositary  within  five   National
    Association  of  Securities  Dealers Automatic  Quotation  System ("NASDAQ")
    trading days  after the  date  of execution  of  such Notice  of  Guaranteed
    Delivery.

    The Notice of Guaranteed Delivery may be delivered by hand or transmitted by
facsimile  transmission or mail  to the Depositary and  must include a signature
guarantee by an Eligible  Institution in the  form set forth  in such Notice  of
Guaranteed Delivery.

    Notwithstanding  any other  provision hereof,  payment for  Shares purchased
pursuant to the Offer will in all cases be made only after timely receipt by the
Depositary of (i)  Share Certificates  for, or of  Book-Entry Confirmation  with
respect  to, such Shares, (ii) a properly  completed and duly executed Letter of
Transmittal (or  a  facsimile thereof),  together  with any  required  signature
guarantees  (or, in the case of a  book-entry transfer, an Agent's Message), and
(iii) any other documents  required by the  Letter of Transmittal.  Accordingly,
payment  might not be made  to all tendering stockholders  at the same time, and
will depend upon  when Share  Certificates or Book-Entry  Confirmations of  such
Shares  into  the Depositary's  account at  a  Book-Entry Transfer  Facility are
actually received by the Depositary.

BACK-UP FEDERAL TAX WITHHOLDING

    UNDER THE  FEDERAL INCOME  TAX  LAWS, THE  DEPOSITARY  WILL BE  REQUIRED  TO
WITHHOLD 31% OF THE AMOUNT OF ANY PAYMENTS MADE TO CERTAIN STOCKHOLDERS PURSUANT
TO  THE OFFER. TO PREVENT BACK-UP FEDERAL INCOME TAX WITHHOLDING WITH RESPECT TO
PAYMENT OF  THE PURCHASE  PRICE OF  SHARES PURCHASED  PURSUANT TO  THE OFFER,  A
TENDERING  STOCKHOLDER  MUST  PROVIDE  THE  DEPOSITARY  WITH  SUCH STOCKHOLDER'S
CORRECT TAXPAYER IDENTIFICATION NUMBER OR  CERTIFY THAT SUCH STOCKHOLDER IS  NOT
SUBJECT  TO BACK-UP FEDERAL INCOME TAX  WITHHOLDING BY COMPLETING THE SUBSTITUTE
FORM W-9  INCLUDED  IN THE  LETTER  OF TRANSMITTAL.  SEE  SECTION 5  HEREOF  AND
INSTRUCTION 10 OF THE LETTER OF TRANSMITTAL.

APPOINTMENT AS PROXY

    By  executing the Letter of Transmittal, a tendering stockholder irrevocably
appoints designees of  the Purchaser, and  each of them,  as such  stockholder's
attorneys-in-fact  and proxies,  each with  full power  of substitution,  in the
manner set  forth in  the Letter  of Transmittal,  to the  full extent  of  such
stockholder's rights with respect to the Shares tendered by such stockholder and
accepted  for payment and paid for by the  Purchaser and with respect to any and
all other Shares and non-cash dividends, distributions, rights, other shares  or
other  securities issued or issuable  in respect of such  Shares on or after the
date of this  Offer to Purchase.  All such proxies  shall be considered  coupled
with  an interest  in the  tendered Shares.  Such appointment  will be effective
when, and  only to  the  extent that,  the Purchaser  pays  for such  Shares  by
depositing  the purchase price therefor with  the Depositary. Upon such payment,
all prior powers of attorney and proxies given by such stockholder with  respect
to  such Shares  and such  other securities or  rights will  be revoked, without
further action, and no subsequent powers of attorney and proxies may be given by
such stockholder (and, if given, will not be deemed effective). The designees of
the Purchaser will,  with respect to  the Shares for  which such appointment  is
effective,  be  empowered  to  exercise  all voting  and  other  rights  of such
stockholder as they in their  sole discretion may deem  proper at any annual  or
special   meeting  of  the   Company's  stockholders,  or   any  adjournment  or
postponement thereof, by  written consent or  otherwise. The Purchaser  reserves
the  right to require that,  in order for Shares  to be deemed validly tendered,

                                       10
<PAGE>
immediately upon the payment for such Shares, the Purchaser or its designee must
be able to exercise  full voting rights  with respect to  such Shares and  other
securities, including voting at any meeting of stockholders or acting by written
consent with respect to such Shares.

DETERMINATION OF VALIDITY

    All  questions  as  to  the  form  of  documents  and  validity, eligibility
(including time of receipt) and acceptance  for payment of any tender of  Shares
will be determined by the Purchaser, in its sole discretion, whose determination
shall  be final and binding on all  parties. The Purchaser reserves the absolute
right to reject any or all tenders determined by it not to be in proper form  or
the  acceptance of or payment  for which may, in  the opinion of the Purchaser's
counsel, be unlawful. The  Purchaser also reserves the  absolute right to  waive
any  of the conditions of the Offer or  any defect or irregularity in any tender
of Shares  of any  particular  stockholder whether  or  not similar  defects  or
irregularities are waived in the case of other stockholders.

    The  Purchaser's interpretation  of the  terms and  conditions of  the Offer
(including the Letter of Transmittal and the instructions thereto) will be final
and binding on  all parties. No  tender of Shares  will be deemed  to have  been
validly  made until  all defects and  irregularities have been  cured or waived.
None of the Purchaser, Crane,  any of their affiliates  or assigns, if any,  the
Depositary,  the Information Agent or any other person will be under any duty to
give any notification of any defects  or irregularities in tenders or incur  any
liability for failure to give any such notification.

    The Purchaser's acceptance for payment of Shares tendered pursuant to any of
the  procedures described above will constitute  a binding agreement between the
tendering stockholder  and the  Purchaser  upon the  terms  and subject  to  the
conditions of the Offer.

    4.   WITHDRAWAL  RIGHTS.   Except as otherwise  provided in  this Section 4,
tenders of Shares made  pursuant to the Offer  are irrevocable. Shares  tendered
pursuant to the Offer may be withdrawn at any time on or prior to the Expiration
Date  and, unless theretofore accepted for  payment as provided herein, may also
be withdrawn at any time after May 28, 1994.

    If, for any reason whatsoever, acceptance for payment of any Shares tendered
pursuant to the  Offer is  delayed, or  the Purchaser  is unable  to accept  for
payment  or  pay  for  Shares  tendered pursuant  to  the  Offer,  then, without
prejudice to  the  Purchaser's rights  set  forth herein,  the  Depositary  may,
nevertheless,  on behalf of the Purchaser retain tendered Shares and such Shares
may not be  withdrawn except  to the extent  that the  tendering stockholder  is
entitled to and duly exercises withdrawal rights as described in this Section 4.
Any  such delay will be by  an extension of the Offer  to the extent required by
law.

    In  order  for  a  withdrawal  to  be  effective,  a  written  or  facsimile
transmission  notice of withdrawal must be  timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase.  Any
such  notice of withdrawal must specify the  name of the person who tendered the
Shares to be  withdrawn, the number  of Shares  to be withdrawn,  and (if  Share
Certificates have been tendered) the name of the registered holder of the Shares
as  set forth in the Share Certificate, if different from that of the person who
tendered such Shares.  If Share  Certificates have been  delivered or  otherwise
identified  to  the  Depositary, then  prior  to  the physical  release  of such
certificates, the tendering stockholder must submit the serial numbers shown  on
the  particular  certificates  evidencing the  Shares  to be  withdrawn  and the
signature on  the  notice  of  withdrawal must  be  guaranteed  by  an  Eligible
Institution,  except  in the  case  of Shares  tendered  for the  account  of an
Eligible Institution. If Shares  have been tendered  pursuant to the  procedures
for  book-entry transfer set forth  in Section 3, the  notice of withdrawal must
specify the  name  and number  of  the  account at  the  appropriate  Book-Entry
Transfer  Facility to  be credited  with the withdrawn  Shares, in  which case a
notice of withdrawal  will be effective  if delivered to  the Depositary by  any
method   of  delivery  described  in  the  first  sentence  of  this  paragraph.
Withdrawals of Shares may not be  rescinded. Any Shares properly withdrawn  will

                                       11
<PAGE>
be  deemed not  validly tendered for  purposes of the  Offer. However, withdrawn
shares may be retendered at any subsequent time prior to the Expiration Date  by
following any of the procedures described in Section 3.

    If  the Separation Date occurs prior to  the Expiration Date and Rights have
been separately tendered, such  Rights may be withdrawn  in the same manner  and
subject  to the same provisions  as set forth in this  Section 4 with respect to
Shares.

    All questions as  to the form  and validity (including  time of receipt)  of
notices  of  withdrawal  will  be  determined  by  the  Purchaser,  in  its sole
discretion, whose determination shall be final and binding on all parties.  None
of  the  Purchaser, Crane,  any  of their  affiliates  or assigns,  if  any, the
Depositary, the Information Agent or any other person will be under any duty  to
give  any  notification  of  any  defects or  irregularities  in  any  notice of
withdrawal or incur any liability for failure to give any such notification.

    5.  CERTAIN TAX CONSEQUENCES.

FEDERAL INCOME TAX

    The receipt  of cash  for Shares  pursuant  to the  Offer (or  the  Proposed
Merger)  will be a taxable transaction for federal income tax purposes under the
Internal Revenue  Code of  1986, as  amended (the  "Code"), and  may also  be  a
taxable  transaction under applicable state, local,  foreign and other tax laws.
The tax consequences of  such receipt pursuant to  the Offer may vary  depending
upon, among other things, the particular circumstances of the stockholder.

    In  general, for federal income tax purposes, a holder of Shares who tenders
Shares in the  Offer or receives  cash in  exchange for Shares  in the  Proposed
Merger  (including as a result of perfecting appraisal rights under the Delaware
Law) will recognize gain or loss equal  to the difference between the tax  basis
for  the Shares sold and the amount  of cash received in exchange therefor. Such
gain or loss will be  capital gain or loss if  the Shares are capital assets  in
the  hands of the  holder of Shares  and will be  long-term gain or  loss if the
holding period for such Shares is more than 12 months. The maximum capital gains
rate for  corporations is  35%; for  individuals, short-term  capital gains  are
subject  to a maximum  marginal federal income  tax rate of  39.6% and long-term
capital gains are subject to a maximum marginal federal income tax rate of 28%.

    The  foregoing  discussion  assumes   that  the  holder   of  Shares  is   a
calendar-year  taxpayer. The foregoing discussion  may not apply to stockholders
who acquired their Shares pursuant to the exercise of employee stock options  or
other  compensation arrangements  with the  Company or  who are  not citizens or
residents of the United  States, foreign corporations,  or stockholders who  are
otherwise  subject to  special tax  treatment under  the Code  such as insurance
companies, tax-exempt entities and regulated investment companies.

    THE DISCUSSION OF TAX CONSEQUENCES SET  FORTH ABOVE IS INCLUDED FOR  GENERAL
INFORMATION  ONLY. DUE TO THE INDIVIDUAL NATURE OF TAX CONSEQUENCES, EACH HOLDER
OF SHARES  IS URGED  TO CONSULT  HIS OWN  TAX ADVISOR  WITH RESPECT  TO THE  TAX
CONSEQUENCES  OF THE OFFER, INCLUDING THE  EFFECTS OF APPLICABLE FEDERAL, STATE,
LOCAL OR OTHER TAX LAWS.

    6.  PRICE RANGE OF THE SHARES; DIVIDENDS.  According to the Company's Annual
Report on Form 10-K for the year ended December 31, 1993 (the "1993 10-K"),  the
Shares  are traded  in the  over-the-counter market  and are  quoted through the
NASDAQ National Market  System. The  Shares are  quoted on  the NASDAQ  National
Market   System   under   the   symbol   "MRCC".   The   following   table  sets

                                       12
<PAGE>
forth, for the periods indicated, the reported high and low closing sale  prices
for  the Shares as reported  on the NASDAQ National  Market System. According to
the 1993 10-K, the Company has not paid any cash dividends on its Common Stock.

<TABLE>
<CAPTION>
                                                                                                   High        Low
                                                                                                 ---------  ---------
<S>        <C>                                                                                   <C>        <C>
1992
           First Quarter.......................................................................  $   9.50   $    6.25
           Second Quarter......................................................................      9.25        7.25
           Third Quarter.......................................................................      8.25        7.00
           Fourth Quarter......................................................................      8.50        6.75
1993
           First Quarter.......................................................................  $   9.25   $    7.50
           Second Quarter......................................................................     10.00        7.75
           Third Quarter.......................................................................      9.75        7.25
           Fourth Quarter......................................................................     10.125       8.00
1994
           First Quarter (through March 29, 1994)..............................................  $  19.625  $   11.25
</TABLE>

    On December 31, 1993, the  last full day of trading  before the filing of  a
Schedule 13D with the Commission by Crane announcing its acquisition of 13.2% of
the  Shares, the reported closing price on the NASDAQ National Market System for
the Shares was $8.875 per Share, according to published sources. On January  17,
1994,  the last  full day  of trading before  the filing  of Amendment  No. 1 to
Crane's Schedule 13D announcing  its proposal to enter  into a merger  agreement
with  the Company for $13  per share in cash, the  reported closing price on the
NASDAQ National Market System for the Shares was $11.25 per Share, according  to
published  sources. On March 11,  1994, the last full  day of trading before the
filing of Amendment  No. 4  to Crane's Schedule  13D announcing  that Crane  was
currently  prepared to acquire the Company in a merger transaction at $15.50 per
share in cash, the reported closing  price on the NASDAQ National Market  System
for the Shares was $14.75 per Share, according to published sources.

    On  March 15, 1994, the last full  day of trading before the announcement of
the terms of  the Danaher Agreement,  the reported closing  price on the  NASDAQ
National  Market  System for  the  Shares was  $15.875  per Share,  according to
published sources. On March 18,  1994, the last full  day of trading before  the
announcement by the Company of Tyco's letter indicating that Tyco is prepared to
pay  $19.00 per Share for all outstanding  Shares, the reported closing price on
the NASDAQ National Market System for the Shares was $18.00 per Share, according
to published sources.

    On March 25, 1994, the last full day of trading prior to the announcement by
Crane that it intended to commence the Offer, the reported closing price on  the
NASDAQ  National Market System for the Shares was $19.25 per Share, according to
published sources.

    STOCKHOLDERS ARE URGED TO OBTAIN A CURRENT MARKET QUOTATION FOR THE SHARES.

    According to the Rights Agreement, after the Rights become exercisable,  the
Company  will use diligent  efforts to cause  all of the  Rights shares issuable
upon exercise of the Rights to be  entitled to be traded in the NASDAQ  National
Market   System.  The   Purchaser  believes,   based  upon   publicly  available
information, that, on the date hereof, the Rights are attached to the Shares and
are not traded  separately. As a  result, the  sale prices per  Share set  forth
above  are also  the high  and low  sale prices  per Share  and associated Right
during such periods. Upon the occurrence of the Separation Date, the Rights  are
to  detach  and  may trade  separately  from  the Shares.  See  Section  11. The
Separation Date will be  the fifth business  day after the  date upon which  the
Company's  Chief Executive Officer "first actually realizes" that certain events
have occurred unless, prior to such date, the Board of Directors of the  Company
shall  have designated another date as  the Separation Date. The commencement of
the Tyco Tender Offer on March 24,  1994, and the commencement of this Offer  on
March 30, are events

                                       13
<PAGE>
which  could  trigger  a  separation of  the  Rights  on March  31  or  April 6,
respectively. IF  THE SEPARATION  DATE  OCCURS AND  THE  RIGHTS BEGIN  TO  TRADE
SEPARATELY  FROM THE  SHARES, STOCKHOLDERS  ARE ALSO  URGED TO  OBTAIN A CURRENT
MARKET QUOTATION FOR THE RIGHTS.

    7.  EFFECT  OF THE OFFER  ON THE  MARKET FOR THE  SHARES; NASDAQ  QUOTATION;
EXCHANGE ACT REGISTRATION; MARGIN REGULATIONS.

EFFECT OF THE OFFER ON THE MARKET FOR THE SHARES

    The  purchase of Shares  pursuant to the Offer  or following consummation of
the Offer will reduce the number  of Shares that might otherwise trade  publicly
and  the number  of holders of  Shares and  could, depending upon  the number of
Shares so purchased,  adversely affect  the liquidity  and market  value of  the
remaining Shares.

NASDAQ QUOTATION

    Depending  upon  the aggregate  market value  and the  number of  Shares not
purchased pursuant to the Offer, as well as the identity of the holders of  such
Shares,  the  Shares may  no longer  meet the  quantitative requirements  of the
National  Association  of  Securities  Dealers,  Inc.  ("NASD")  for   continued
inclusion  in the  NASDAQ National Market  System, which require  that an issuer
have at least 200,000 publicly held shares, held by at least 400 stockholders or
300 stockholders of round lots, with a  market value of at least $1 million  and
must  have net tangible assets of at least  $1 million, $2 million or $4 million
(depending on profitability levels during  the issuer's four most recent  fiscal
years) and a minimum bid price of $1 (unless the issuer has a public float of at
least  $3 million  and at  least $4  million of  net tangible  assets). If these
standards are not met, quotations might continue to be published in the  regular
NASDAQ  system,  but  (subject  to  certain  exceptions  and  other  maintenance
criteria) if the number of holders of the  Shares were to fall below 300, or  if
the  number of publicly  held Shares were  to fall below  100,000, or the market
value of  the publicly  held shares  were  to fall  below $200,000,  NASD  rules
provide  that the securities would no longer be "qualified" for NASDAQ reporting
and NASDAQ  could cease  to  provide any  quotations.  Shares held  directly  or
indirectly  by an officer or director of  the Company or by any beneficial owner
of more  than 10%  of the  Shares will  ordinarily not  be considered  as  being
publicly held for this purpose. If, as a result of the purchase of Shares by the
Purchaser  pursuant to  the Offer  or following  consummation of  the Offer, the
Shares no longer meet  the requirements of the  NASD for continued inclusion  in
the  NASDAQ National Market System and the  Shares are no longer included in the
NASDAQ National Market System, the market for, and liquidity of, Shares could be
adversely affected. In the event the  Shares were no longer eligible for  NASDAQ
quotation, quotations might still be available from other sources. The extent of
the  public market for the Shares and the availability of such quotations would,
however, depend  upon the  number of  stockholders and/or  the aggregate  market
value of the Shares remaining at such time, the interest in maintaining a market
in  the Shares  on the  part of  securities firms,  the possible  termination of
registration of the Shares under the Exchange Act as described below, and  other
factors.

    The  Purchaser cannot predict whether the  reduction in the number of Shares
that might otherwise trade publicly would  have an adverse or beneficial  effect
on the market price for or marketability of the Shares or whether it would cause
future market prices to be greater or less than the price paid in the Offer.

EXCHANGE ACT REGISTRATION

    The  Shares are currently registered under the Exchange Act. The purchase of
the Shares pursuant to the Offer may result in the Shares becoming eligible  for
deregistration  under  the  Exchange  Act. Registration  of  the  Shares  may be
terminated upon application of the Company  to the Commission if the Shares  are
not  listed on  a "national  securities exchange" and  there are  fewer than 300
record holders of Shares.  Termination of registration of  the Shares under  the
Exchange Act would substantially reduce the information required to be furnished
by  the Company to  its stockholders and  the Commission and  would make certain
provisions of  the  Exchange  Act,  such  as  the  short-swing  profit  recovery
provisions of Section 16(b) and the requirements of furnishing a proxy statement
in  connection with stockholders' meetings pursuant  to Section 14(a), no longer
applicable to the Company. If

                                       14
<PAGE>
the  Shares are no longer registered under the Exchange Act, the requirements of
Rule 13e-3 under the Exchange Act  with respect to "going private"  transactions
would  no  longer be  applicable  to the  Company.  Furthermore, the  ability of
"affiliates" of the Company and  persons holding "restricted securities" of  the
Company to dispose of such securities pursuant to Rule 144 promulgated under the
Securities  Act of  1933, as amended,  may be  impaired or eliminated.  If, as a
result of the purchase of Shares pursuant to the Offer, the Company is no longer
required to maintain  registration of  the Shares  under the  Exchange Act,  the
Purchaser  intends  to  cause  the  Company to  apply  for  termination  of such
registration. See Section 11.

    Based on publicly available information, the  Rights as of the date of  this
Offer to Purchase are registered under the Exchange Act, but are attached to the
Shares  and are not  quoted on the  NASDAQ National Market  System or separately
transferable. If the  Separation Date occurs  and the Rights  separate from  the
Shares  (See Section 11), the foregoing discussion with respect to the effect of
the Offer  on the  market for  the  Shares, NASDAQ  quotation and  Exchange  Act
registration would apply to the Rights in a similar manner.

    If  registration  of the  Shares  is not  terminated  prior to  the Proposed
Merger, then the Shares will be  deregistered from NASDAQ, and the  registration
of  the  Shares  under  the  Exchange  Act  will  be  terminated,  following the
consummation of the Proposed Merger.

MARGIN REGULATIONS

    The Shares are presently  "margin securities" under  the regulations of  the
Board  of Governors of the Federal Reserve System (the "Federal Reserve Board"),
which has the effect, among other  things, of allowing brokers to extend  credit
on  the collateral of such Shares for the purpose of buying, carrying or trading
in securities ("Purpose  Loans"). Depending  on factors  such as  the number  of
record  holders of the Shares  and the number and  market value of publicly held
Shares, following the purchase of Shares pursuant to the Offer the Shares  might
no  longer constitute  "margin securities" for  purposes of  the Federal Reserve
Board's margin regulations and, therefore, could no longer be used as collateral
for Purpose Loans made  by brokers. In addition,  if registration of the  Shares
under  the Exchange Act  were terminated, the Shares  would no longer constitute
"margin securities".

    8.  CERTAIN INFORMATION CONCERNING THE  COMPANY.  The Company is a  Delaware
corporation  with its  principal executive offices  located at  5215 Old Orchard
Road, Skokie, Illinois 60077. The following general description of the Company's
business has been taken from the 1993 10-K:

        Mark Controls' business consists  primarily of designing,  manufacturing
    and  marketing  valves and  other  industrial and  commercial  products that
    control flows  and  processes  in various  industries  including  petroleum,
    chemical,  construction, food and beverage and power generation. The Company
    sells products directly to end users and engineering contractors through its
    own sales  force  and  cooperatively with  sales  representatives,  stocking
    specialists and industrial distributors.

    The  selected  financial information  of  the Company  and  its consolidated
subsidiaries set forth below has been excerpted and derived from the 1993  10-K.
More  comprehensive financial information is included in such reports (including
management's analysis of results of operations and financial position) and other
documents filed  with the  Commission. The  following financial  information  is
qualified  in its  entirety by  reference to  the 1993  10-K and  all other such
reports and  documents  filed with  the  Commission  and all  of  the  financial
statements  and related notes contained therein. The 1993 10-K and certain other
reports may  be examined  and  copies may  be obtained  at  the offices  of  the
Commission or the NASD in the manner set forth below.

                                       15
<PAGE>
                           MARK CONTROLS CORPORATION
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                                    YEARS ENDED DECEMBER 31,
                                                                                 -------------------------------
                                                                                   1993       1992       1991
                                                                                 ---------  ---------  ---------
<S>                                                                              <C>        <C>        <C>
INCOME
Net Sales......................................................................  $  87,789  $  86,214  $  92,306
Cost of Sales..................................................................     59,277     58,277     63,797
Gross Profit...................................................................     28,512     27,937     28,509
Selling, General and Administrative Expenses...................................     22,806     21,341     22,500
Operating Income...............................................................      5,706      6,596      6,009
Other (Income) Expense.........................................................        604        606        719
Income Before Income Taxes.....................................................      5,102      5,990      5,290
Income Tax Provision...........................................................      1,990      2,336      2,010
Net Income.....................................................................      3,112      3,654      3,280
Net Income Per Share...........................................................       0.61       0.73       0.66
</TABLE>

<TABLE>
<CAPTION>
                                                                                               AT DECEMBER 31,
                                                                                             --------------------
                                                                                               1993       1992
                                                                                             ---------  ---------
<S>                                                                                          <C>        <C>
ASSETS
Total Current Assets.......................................................................  $  53,471  $  36,769
Intangible Assets..........................................................................     17,815      5,322
Property, Plant and Equipment..............................................................     19,014     10,099
Total Current Liabilities..................................................................     17,775     11,420
Long Term Debt.............................................................................     31,640      3,000
Deferred Income Taxes......................................................................        473        582
Other Non-current Liabilities..............................................................        859        859
Stockholders' Equity.......................................................................     39,553     36,329
</TABLE>

    The  information concerning the Company contained herein has been taken from
or based upon publicly available documents on file with the Commission and other
publicly available information. Although neither Crane nor the Purchaser has any
knowledge that would  indicate that  the statements contained  herein which  are
based on such documents are untrue, none of Crane, the Purchaser, the Depositary
or   the  Information  Agent  takes  any  responsibility  for  the  accuracy  or
completeness of the information contained in  such documents or for any  failure
by  the Company  to disclose events  that may  have occurred and  may affect the
significance or accuracy of  any such information but  which are unknown to  any
such person.

    The  Company is subject to the information and reporting requirements of the
Exchange Act and in accordance therewith  is required to file periodic  reports,
proxy  statements  and other  information with  the  Commission relating  to its
business, financial  condition and  other matters.  Certain information,  as  of
particular  dates, concerning  the Company's  directors and  officers (including
their remuneration and the stock options granted to them), the principal holders
of  the  Company's  securities,  any  material  interests  of  such  persons  in
transactions  with the Company and other matters  is required to be disclosed in
proxy statements and  annual reports distributed  to the Company's  stockholders
and  filed  with  the  Commission.  Such  reports,  proxy  statements  and other
information may be  inspected and  copied at the  Commission's public  reference
facilities  at Room 1024,  Judiciary Plaza, 450  Fifth Street, N.W., Washington,
D.C. 20549,  and  should also  be  available  for inspection  at  the  following
regional  offices of the  Commission: 7 World  Trade Center, New  York, New York
10048; and 500 West Madison Street,  Chicago, Illinois 60621; and copies may  be
obtained  by  mail  at  prescribed  rates,  from  the  principal  office  of the
Commission at 450  Fifth Street,  N.W., Washington, D.C.  20549. Reports,  proxy
statements and other information concerning the Company should also be available
for inspection at the offices of the NASD, Reports Section, 1735 K Street, N.W.,
Washington, D.C. 20006.

                                       16
<PAGE>
    During  the course of discussions between Crane and the Company, the Company
provided Crane with  certain information about  the Company which  was not  then
publicly  available.  This  information included  projections  of  the Company's
operations for the years  1994-1996. These projections  included, for the  years
ending December 31, 1994, 1995 and 1996, respectively: projected sales of $137.7
million,  $146.3 million and $155.5 million; projected operating income of $14.7
million, $15.3 million and $17.2 million; projected net income of $5.3  million,
$6.2  million and $7.5 million; projected  operating cash flow of $20.1 million;
$21.6 million and  $23.3 million;  projected working capital  of $33.2  million,
$33.8  million  and $36.1  million; projected  earnings before  interest, taxes,
depreciation and amortization of $17.0 million, $18.1 million and $19.6 million;
and projected earnings before interest and taxes of $11.6 million, $11.8 million
and $13.6 million.  Such projections  were not prepared  with a  view to  public
disclosure  or  to complying  with the  published  guidelines of  the Commission
regarding  projections  or  with  the  AICPA  Guide  for  Prospective  Financial
Statements.  The  projections  necessarily  reflect  numerous  assumptions  with
respect to industry  performance, general business  and economic conditions  and
other  matters, many of  which are inherently uncertain  or beyond the Company's
control. The inclusion  of the foregoing  information in the  Offer to  Purchase
should  not be regarded as an indication  that Crane, the Purchaser, the Company
or the Information Agent or anyone who received such information considered it a
reliable predictor of future events, and  this information should not be  relied
on  as such.  None of  Crane, the Purchaser,  the Information  Agent assumes any
responsibility for the validity, reasonableness, accuracy or completeness of the
projections, and  the  Company  has  made no  representation  to  Crane  or  the
Purchaser regarding the projections set forth above.

    9.  CERTAIN INFORMATION CONCERNING THE PURCHASER AND CRANE

THE PURCHASER

    The  Purchaser, a Delaware  corporation, was incorporated  on March 28, 1994
for the purpose of acquiring  the Company, and has  engaged in no activities  to
date,  other than those incidental to its organization and making the Offer. The
Purchaser is a wholly owned subsidiary of Crane. The principal executive offices
of the Purchaser are located at 100 First Stamford Place, Stamford,  Connecticut
06902.  Since  the  Purchaser  is  newly  formed  and  has  minimal  assets  and
capitalization,  no  meaningful  financial  information  with  respect  to   the
Purchaser is available.

CRANE

    Crane is a Delaware corporation with its principal executive offices located
at 100 First Stamford Place, Stamford, Connecticut 06902.

    Crane  is  a  diversified manufacturer  of  engineered  industrial products,
serving niche markets in aerospace, fluid handling, automatic merchandising  and
the  construction industry.  Crane's wholesale distribution  business serves the
building products  markets  and industrial  customers.  Founded in  1855,  Crane
employs  over  8,500  people in  North  America, Europe  and  Australia. Crane's
strategy is to maintain  a balanced business mix,  to focus on niche  businesses
with high market share and to avoid capital-intensive and cyclical businesses.

    The  name, business  address, citizenship, present  principal occupation and
employment history  of each  of  the directors  and  executive officers  of  the
Purchaser and Crane are set forth in Schedule I to this Offer to Purchase.

    Crane  is  subject  to the  information  and reporting  requirements  of the
Exchange Act and in accordance therewith  is required to file periodic  reports,
proxy  statements  and other  information with  the  Commission relating  to its
business, financial  condition and  other matters.  Certain information,  as  of
particular  dates, concerning  Crane's business,  principal physical properties,
capital  structure,  material  pending  legal  proceedings,  operating  results,
financial  condition, directors  and officers (including  their remuneration and
stock options granted to them), the principal holders of Crane's securities, any
material interests of such persons in transactions with Crane and other  matters
is  required to be disclosed in  proxy statements and annual reports distributed
to Crane's stockholders

                                       17
<PAGE>
and filed  with  the  Commission.  Such  reports,  proxy  statements  and  other
information  may be  inspected and copied  at the  Commission's public reference
facilities in  the same  manner as  set forth  with respect  to the  Company  in
Section 8. In addition, such information is also available for inspection at the
New York Stock Exchange, 20 Broad Street, New York, New York 10005.

    Set  forth below is a summary  of certain consolidated financial information
with respect to Crane and its  subsidiaries excerpted or derived from  financial
statements  presented in Crane's Annual Report on  Form 10-K for the fiscal year
ended December 31, 1993. More comprehensive financial information is included in
such reports  (including  management's analysis  of  results of  operations  and
financial  position) and other documents filed by Crane with the Commission, and
the financial information summary set forth  below is qualified in its  entirety
by  reference to such  reports, which are incorporated  herein by reference, and
all the financial information and related notes contained therein.

                                   CRANE CO.
                  SELECTED CONSOLIDATED FINANCIAL INFORMATION
                (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                              Year Ended December 31,
                                                                   ----------------------------------------------
                                                                       1993             1992            1991
                                                                   -------------  ----------------  -------------
<S>                                                                <C>            <C>               <C>
INCOME STATEMENT INFORMATION:
Net Sales........................................................  $   1,310,205  $   1,306,977     $   1,302,532
Operating Costs and Expenses.....................................      1,224,349      1,261,733         1,223,630
Operating Profit.................................................         85,856         45,244(a)         78,902
Other Income (Deductions)........................................         (6,038)        (6,555)           (6,497)
Income Before Taxes..............................................         79,818         38,689            72,405
Provision for Income Taxes.......................................         30,925         14,403            27,412
Net Income.......................................................  $      48,893  $      24,286(a)  $      22,652
Income before cumulative effect of a change in accounting........          $1.62            $.79            $1.42
Cumulative effect of a change in accounting for postretirement
 benefits other than pensions....................................             --              --             (.70)
Net Income Per Share.............................................          $1.62            $.79  (a)         $ .72
Dividends Per Share..............................................          $ .75            $.75            $ .75
</TABLE>

<TABLE>
<S>   <C>
<FN>
- ------------------------
(a)   Includes a  special charge  of $39,444  ($24,400 after  tax) or  $.78  per
      share.
</TABLE>

<TABLE>
<CAPTION>
                                                                                              At December 31,
                                                                                          ------------------------
                                                                                             1993         1992
                                                                                          -----------  -----------
<S>                                                                                       <C>          <C>
BALANCE SHEET INFORMATION:
Total Current Assets....................................................................  $   393,546  $  $378,653
Property, Plant and Equipment...........................................................      199,394      163,185
Other Assets............................................................................       38,142       26,205
Cost in excess of net assets acquired less accumulated amortization.....................      113,083       62,168
Total Current Liabilities...............................................................  $   271,683  $   174,023
Long Term Debt..........................................................................      105,557      111,048
Deferred Income Taxes...................................................................        6,138        3,673
Reserves and Other Liabilities..........................................................       20,631       23,008
Accrued Postretirement Benefits.........................................................       42,570       39,398
Accrued Pension Liability...............................................................        6,767        7,709
Total Common Shareholders' Equity.......................................................  $   290,819  $   271,352
</TABLE>

                                       18
<PAGE>
    On  March 18, 1994 pursuant to a  tender offer, a wholly owned subsidiary of
Crane acquired  5,620,383  shares  of  the common  stock  of  ELDEC  Corporation
("ELDEC") at $13.00 per share. With this purchase, that subsidiary acquired 98.7
percent of the outstanding shares of ELDEC and thereafter consummated the merger
of  ELDEC into that  subsidiary, in which  each remaining share  of ELDEC common
stock was converted into  the right to  receive $13.00 in cash.  ELDEC is now  a
wholly  owned subsidiary  of Crane.  Funds in  the amount  of up  to $74,000,000
required  for  the  acquisition  of  ELDEC  have  been  made  available  through
short-term credit lines.

    ELDEC,  a Washington  based corporation,  designs, manufactures  and markets
custom electronic and  electromechanical products and  systems for  applications
that  are technically and environmentally demanding. The company serves both the
commercial and military aerospace markets, and its major customers are  airframe
and  aircraft  engine manufacturers  and  electronic systems  manufacturers. The
company has  four product  lines; sensing  systems that  monitor the  status  of
aircraft  landing gear, doors and flight  surfaces; low voltage and high voltage
power supplies for avionic and  defense electronic systems; monitor and  control
devices  for  aircraft  engines,  including  flowmeters  and  engine  diagnostic
systems;  battery  chargers,  transformer-rectifiers  and  other  devices   that
regulate DC power on an aircraft.

    For  the year ended March 31, 1993, ELDEC had net sales of $108,415,000, net
income of $2,430,000, and total assets of $112,235,000.

    Except as set forth  elsewhere in this  Offer to Purchase  or in Schedule  I
hereto:  (i)  neither the  Purchaser  nor Crane  nor,  to the  knowledge  of the
Purchaser and Crane,  any of  the persons  listed in  Schedule I  hereto or  any
associate or majority-owned subsidiary or any pension, profit-sharing or similar
plan  of the Purchaser, Crane or any of the persons so listed, beneficially owns
or has a  right to  acquire any  Shares or any  other equity  securities of  the
Company;  (ii) neither  the Purchaser  nor Crane  nor, to  the knowledge  of the
Purchaser and Crane, any of  the persons or entities  referred to in clause  (i)
above or any of their executive officers, directors or subsidiaries has effected
any  transaction in  the Shares  or any other  equity securities  of the Company
during the past  60 days;  (iii) neither  the Purchaser  nor Crane  nor, to  the
knowledge  of the Purchaser and  Crane, any of the  persons listed in Schedule I
hereto has any  contract, arrangement,  understanding or  relationship with  any
other  person with respect to any securities  of the Company, including, but not
limited to,  any  such  contract,  arrangement,  understanding  or  relationship
concerning  the  transfer  or voting  thereof,  joint ventures,  loan  or option
arrangements, puts or calls, guaranties of loans, guaranties against loss or the
giving or withholding of proxies; (iv) since January 1, 1991, there have been no
transactions which would require  reporting under the  rules and regulations  of
the  Commission  between  the  Purchaser,  Crane  or  any  of  their  respective
subsidiaries or, to the knowledge of the Purchaser and Crane, any of the persons
listed in Schedule I  hereto, on the one  hand, and the Company,  or any of  its
executive  officers, directors or  affiliates, on the other  hand; and (v) since
January 1,  1991, there  have  been no  contacts, negotiations  or  transactions
between  the Purchaser, Crane or any of their respective subsidiaries or, to the
knowledge of the Purchaser and  Crane, any of the  persons listed in Schedule  I
hereto,  on the one hand, and the Company  or its affiliates, on the other hand,
concerning a  merger,  consolidation  or  acquisition,  tender  offer  or  other
acquisition  of securities, an election of directors or a sale or other transfer
of a material amount of assets of the  Company. From time to time Crane and  its
affiliates  and associates have  engaged in ordinary  business transactions with
the Company and expect to  engage in such transactions  with the Company in  the
future.

    On December 23, 1993, Crane purchased 450,510 Shares in a single transaction
on NASDAQ at $8.63 per share.

10.  BACKGROUND OF THE OFFER; CONTACTS WITH THE COMPANY.

    During the Spring of 1993, Crane purchased an aggregate of 213,300 Shares in
open   market  transactions,   constituting  approximately  4.3%   of  the  then
outstanding Shares.  In  May, 1993,  R.S.  Evans, Chairman,  President  &  Chief
Executive  Officer  of Crane,  contacted William  E.  Bendix, President  & Chief
Executive Officer of  the Company, by  telephone and expressed  interest in  the

                                       19
<PAGE>
Company and offered assistance at a time when a group of investors was proposing
a  transaction with the  Company. On December 23,  1993, Crane purchased 450,510
Shares in a single  transaction on NASDAQ  at $8.63 per  share, resulting in  an
aggregate holding of approximately 13.2% of the Shares.

    On  January  17,  1994, Mr.  Evans  contacted  Mr. Bendix  by  telephone and
indicated Crane's interest in discussing with the Company a business combination
involving Crane and the Company. As a result of that discussion, on January  17,
1994,  Mr. Evans delivered the following letter  to Mr. Bendix with respect to a
proposal to enter into  a merger agreement  to acquire the  Company for $13  per
share in cash:

    Mr. William E. Bendix
    President & Chief Executive Officer
    Mark Controls Corporation
    5202 Old Orchard Road
    Skokie, Illinois 60077

    Dear Bill:

           Further to  our telephone  conversation earlier  today, Crane  Co. is
    proposing to  enter  into  a  merger  agreement  to  acquire  Mark  Controls
    Corporation  for $13  per share  in cash.  We believe  that our  proposal is
    generous to Mark Controls' shareholders, who would receive a premium of more
    than 45% above the market  value of their shares  prior to January 3,  1994,
    the  date on  which Crane  filed its  Schedule 13D  with the  Securities and
    Exchange  Commission.  Our  proposal  represents  an  opportunity  for  your
    shareholders to realize extraordinary value, by any measure.

         As I indicated to you in our telephone conversation, we have arrived at
    our  valuation  of  Mark  Controls  on  the  basis  of  publicly   available
    information.  We  would be  prepared to  increase our  proposed price  if we
    conclude that such increase is justified by Mark Controls' business plan and
    other non-public information concerning the Company. In light of our  merger
    proposal,  we hereby  request that Crane  and its advisors  be provided with
    access to such  information. On the  phone, you indicated  a willingness  to
    meet  with me  next week. Access  to some  of that information  prior to our
    meeting would substantially  enhance our  discussions. I  am enclosing  with
    this  letter a form of confidentiality  agreement which would govern our use
    of any non-public information provided to Crane or its advisors. As you  can
    appreciate,  the  agreement has  been prepared  by  our advisors  to protect
    confidentiality without limiting our flexibility to appeal directly to  your
    shareholders.

         We appreciate that,  in considering our merger proposal, the obligation
    of your board of directors is to examine it from the standpoint of the  best
    interests of Mark Controls' shareholders. We recognize as well, however, the
    additional   responsibility  that  directors   quite  properly  feel  toward
    employees, management, the community and  customers being served. With  this
    in  mind, may I make clear Crane's sincere interest in this regard. We would
    expect that Mark Controls  would be operated  in such a  way as to  maintain
    these relationships.

          Our  strong confidence  is to  complete a  friendly, negotiated merger
    transaction. However,  we are  fully  committed and  resolved to  pursue  an
    acquisition of Mark Controls, even if our discussions do not prove fruitful.
    Should  your  board  reject our  proposal  or  determine not  to  enter into
    negotiations with us,  we will feel  obligated to pursue  an acquisition  of
    Mark  Controls by taking our merger  proposal directly to your shareholders.
    As I am sure you are aware,  this would most certainly involve, among  other
    things,   a  proxy  fight   or  consent  solicitation   to  obtain  majority
    representation on Mark Controls' board of  directors. Such a proxy fight  or
    consent  solicitation  would  allow  your  shareholders  to  make  their own
    decision regarding  their interest  in  a transaction  with Crane.  In  this
    regard,  we are aware  that you may  be considering adding  two directors to
    your board. We believe  that to do  this or to take  any action which  would
    affect shareholder voting rights, without a vote of your shareholders and in
    the  face  of our  stated intention  to  commence a  proxy fight  or consent
    solicitation, would be a breach of fiduciary duty on the part of your board.

                                       20
<PAGE>
        We believe that working together will be the best means of completing  a
    transaction  that is in the best  interests of your shareholders, employees,
    customers, suppliers and the communities in which you serve. I look  forward
    to working with you.

                                          Sincerely,

                                          /s/ R.S. Evans

    On January 26, 1994, Mr. Evans and other Crane representatives, met with Mr.
Bendix   and  other  Company  representatives   to  discuss  publicly  available
information about the Company. At  that meeting, which both sides  characterized
as  amicable, Mr.  Evans reiterated  Crane's determination  to proceed  with the
proposal made in the letter to Mr. Bendix dated January 17, 1993.

    The Company reported that  at its regularly  scheduled meeting held  January
28,  1994, the Board of Directors of the Company considered the proposal made by
Crane on January 17, 1994 to acquire the Company at a price of $13 per Share  in
cash.  On January 31, 1994, the Company issued a press release and explained the
Board of Directors' decision on Crane's merger proposal as follows:

         .  . .The Board  reported that  other companies have  also expressed  a
    preliminary interest in acquiring all or part of Mark Controls.

           "Long  before  the Crane  proposal  was made,  the  announced primary
    objective of Mark Controls' Board  has been to maximize shareholder  value,"
    said  William  Bendix, Mark  Controls' chief  executive officer.  "The Board
    intends to explore actively  how to best pursue  that objective in light  of
    the  interest that has been expressed in  the company." Bendix said that the
    Board has retained the  New York-based investment banking  firm of Tanner  &
    Co.,  Inc. to assist in  that effort. No determination  has yet been made to
    sell the company, the executive added.

    On February 11, 1994,  Crane entered into  a confidentiality agreement  with
the  Company. Under  that agreement,  Crane was  permitted to  review non-public
information with  respect  to  the  Company in  order  to  evaluate  a  possible
transaction  with  the  Company.  In  addition,  the  confidentiality  agreement
provided that Crane could  not (i) disclose  confidential information which  the
Company   furnished  in  connection  with   Crane's  evaluation  of  a  possible
transaction with the Company or (ii) commence any tender offer for the Shares of
the Company  earlier  than 15  days  after delivery  of  a signed  copy  of  the
agreement  to the Company. Thereafter,  Crane and its advisers  engaged in a due
diligence  review  of  the  Company  and  were  provided  access  to  non-public
information about the Company, including the confidential memorandum prepared by
Tanner & Co., Inc.

    On March 9, 1994, Crane received a letter from the Company inviting "a small
group  of final bidders," including Crane, to submit a "best and final proposal"
to acquire the  Company. The deadline  for such proposal  was 5:00 P.M.  eastern
time  on  Monday, March  13 (sic),  1994. Upon  review of  the proposed  form of
acquisition agreement accompanying the March 9 letter, Crane became aware of new
developments, not previously disclosed, which would affect Crane's evaluation of
the Company. Despite the uncertainties created by these new developments,  Crane
announced  on March 14,  1994, that it  would increase its  offer to acquire the
Company to  $15.50  per share.  Also  on March  14,  1994, Crane  delivered  the
following letter to the Company:

    Mr. William E. Bendix
    President and Chief Executive Officer
    Mark Controls Corporation
    5202 Old Orchard Road
    Skokie, IL 60077

    Dear Bill:

         Your letter of March 9, 1994, invites Crane Co. to submit a proposal to
    acquire Mark Controls pursuant to  the procedures specified in that  letter.
    Since entering into our February 10, 1994

                                       21
<PAGE>
    Confidentiality  Agreement, Crane  Co. has  been conducting  a due diligence
    review.  However,  we  are  neither  required  nor  willing  to  proceed  in
    accordance with the procedure specified in your March 9 letter.

         Surprisingly, the proposed form of acquisition [agreement] accompanying
    your  March  9  letter  brought  to  our  attention  new  developments,  not
    previously  disclosed to us, which  affect our evaluation. Specifically, the
    draft agreement reveals that on March 8, 1994 your Board approved changes to
    existing severance agreements  with senior management  as well as  approving
    new  severance  and  "stay  incentive"  agreements  with  other  members  of
    management and six staff employees. At that meeting, the Board also approved
    changes in the  Company's pension  trust and  its stock  option plans  which
    affect   the  value  of  Mark  Controls.  Documentation  relating  to  these
    developments has only recently  been made available to  us and is  currently
    under  scrutiny. We are  troubled by the  timing of these  changes and their
    disclosure  to  us,  their  potential  negative  financial  impact  and  the
    constraints they place on our flexibility. The form of acquisition agreement
    also  contains requirements  with respect  to maintenance  of directors' and
    officers' liability  insurance substantially  similar to  that currently  in
    force  until  December 31,  1999, without  regard  to increases  in premium.
    Again, we  have only  recently obtained  information concerning  the  policy
    currently  in  force and  are in  the process  of determining  the financial
    impact of  this requirement.  Further,  we are  also reviewing  your  recent
    disclosures  regarding previously owned facilities  and the terms of certain
    acquisitions  and  divestitures   to  determine  the   scope  of   potential
    liabilities  which they  reflect. We may  wish to  inquire further regarding
    these developments and reserve our right to question the action taken by the
    Board on March 8.

        Despite these uncertainties, Crane Co. is currently prepared to  acquire
    Mark  Controls Corporation  in a merger  transaction at $15.50  per share in
    cash.

        I look forward to hearing from you.

                                          Sincerely yours,

                                          /s/ R.S. Evans

    On March  16, 1994,  the Company  announced  that it  had entered  into  the
Danaher  Agreement with  Danaher at  a price  of $17.75  per Share.  The Danaher
Agreement provides,  among other  things,  that Danaher  will make  the  Danaher
Tender  Offer and that, following  the purchase of shares  in the Danaher Tender
Offer, a subsidiary of Danaher  will merge with and  into the Company with  each
remaining  Share being converted into the right to receive $17.75 in cash or any
higher price per Share paid in  the Danaher Tender Offer. The Danaher  Agreement
provides  for payment by the Company to Danaher  of a break-up fee of $2 million
plus up  to $700,000  of all  documented  fees, costs  and expenses  in  certain
circumstances,  including (with certain exceptions) in  the event the Company is
acquired by any person other than Danaher  or an affiliate thereof prior to  the
termination of the Danaher Agreement or within nine months thereafter, or if the
Company  or its Board  of Directors shall have  withdrawn its recommendations of
the Danaher Tender Offer  or shall have failed  to reaffirm such  recommendation
upon the request of Danaher. Crane, currently a holder of approximately 13.2% of
the  outstanding  Shares and  prospectively the  controlling stockholder  of the
Company following consummation of the Offer,  reserves the right to contest  the
validity  and  enforceability  of  the break-up  fee  contained  in  the Danaher
Agreement. The Danaher  Agreement may be  terminated by the  Company in  certain
circumstances,  including if the  Danaher Tender Offer  expires or is terminated
without any Shares  being purchased thereunder,  or if the  consummation of  the
Danaher Tender Offer shall not have occurred by June 30, 1994.

    On  March 17,  1994, Crane contacted  Danaher to explore  the possibility of
Crane acquiring  the Company's  valve  business if  Danaher should  acquire  the
Company.  Danaher expressed  its willingness to  discuss such  a transaction and
proposed that  substantive discussions  proceed  during the  week of  March  21.
During  the  week of  March  21, Crane  again  contacted Danaher  to  pursue its
interest in acquiring the valve business but the discussions were inconclusive.

                                       22
<PAGE>
    On March 19,  1994, Tyco  informed the Company  by letter  (the contents  of
which  were described in a press release issued by the Company on March 21) that
it was prepared to pay a price of  $19.00 per Share in cash for all  outstanding
Shares  in a  merger transaction and  it would enter  into definitive agreements
similar to the Danaher Agreement.

    On March  22, 1994,  a  wholly owned  subsidiary  of Danaher  commenced  the
Danaher Tender Offer.

    Also  on  March 22,  the Company  delivered a  letter to  Tyco in  which the
Company made a counterproposal to Tyco. The counterproposal was that Tyco make a
tender offer directly to the Company's stockholders offering to purchase all the
Shares for a cash price of $19  per share (or more) without first entering  into
an agreement with the Company. The letter also stated in part that:

         "Mark Controls  Board has today resolved that  if Tyco initiates an all
    cash all shares tender offer at $19  per share or higher on or before  April
    4, 1994, then (i) that tender offer and any merger which shall follow within
    six  months after conclusion of the [o]ffer providing remaining stockholders
    with at least the same consideration per share as the consideration paid  in
    the  tender offer will be deemed to have been approved by the Board today to
    the extent necessary so that the  provisions of Section 203 of the  Delaware
    General  Corporation Law will not apply to that merger and (ii) neither that
    tender offer nor  such merger  will cause Mark  Controls' outstanding  stock
    purchase rights to become exercisable."

    On  or about March  22, 1994, Crane  contacted the Company  by telephone and
obtained from the Company current financial information.

    On March 24,  a wholly owned  subsidiary of Tyco  commenced the Tyco  Tender
Offer.

    On March 28, Crane delivered the following letter to the Company:

    Mr. William E. Bendix
    President and Chief Executive Officer
    Mark Controls Corporation
    5202 Old Orchard Road
    Skokie, IL 60077
            Re: Crane Tender Offer
    Dear Bill:

          We have  publicly announced today  our intention to  commence a tender
    offer for  Mark Controls  at $19.50.  Crane has  determined to  pursue  this
    acquisition because of the excellent business fit between our two companies.
    We have been impressed with the professional management of Mark Controls and
    expect that the integration of our businesses will enhance both.

          We expect, considering the  level of our bid,  that at the appropriate
    time you and your board of directors will take all necessary and appropriate
    actions to facilitate our offer  and its attendant purpose, the  acquisition
    of all outstanding Mark Controls shares and rights to acquire shares.

                                          Sincerely,
                                          /s/ Shell

    On March 30, the Purchaser commenced the Offer.

    Except  as described  above, there  have been  no contacts,  negotiations or
transactions between the Purchaser, Crane or their subsidiaries or, to the  best
knowledge  of the Purchaser and Crane, any  of the persons listed on Schedule I,
and the  Company  or  its  affiliates, concerning  a  merger,  consolidation  or
acquisition,  tender  offer  or  other acquisition  of  securities,  election of
directors or a sale or other transfer of a material amount of assets.

                                       23
<PAGE>
    11.   PURPOSE OF THE OFFER; PLANS FOR THE COMPANY; OTHER MATTERS RELATING TO
THE OFFER AND THE PROPOSED MERGER.

PURPOSE OF THE OFFER

    The purpose of the Offer is for Crane, through the Purchaser, to acquire the
entire equity interest in the Company. Crane already owns approximately 13.2% of
the Company and is its largest stockholder. The Offer is intended to  facilitate
the  acquisition  of all  Shares. The  Purchaser currently  intends, as  soon as
practicable following  completion  of  the  Offer, to  seek  to  consummate  the
Proposed Merger. The purpose of the Proposed Merger is to acquire all Shares not
tendered  and  purchased pursuant  to the  Offer or  otherwise. Pursuant  to the
Proposed Merger, each  Share then outstanding  (other than Shares  owned by  the
Purchaser,  Crane or any of their affiliates, Shares held in the treasury of the
Company, and Shares owned  by stockholders who  perfect any available  appraisal
rights  under the Delaware Law) would be  converted into the right to receive an
amount in cash equal to  the price per Share paid  by the Purchaser pursuant  to
the  Offer. Consummation of the Proposed Merger  would require the adoption of a
resolution by  the Company's  Board of  Directors that  the Proposed  Merger  is
advisable and the affirmative vote of the holders of at least 80% of the Shares.
Alternatively,  if  the  Purchaser purchases  90%  or  more of  the  Shares, the
Proposed Merger could be  consummated without the  approval of the  stockholders
through a Short-Form Merger (described below under "Statutory Requirements"). As
described  below,  consummation of  the Proposed  Merger  is further  subject to
certain provisions of the Company's  Restated Certificate of Incorporation  (the
"Charter"),  the Company's Bylaws (the "Bylaws") and Section 203 of the Delaware
Law.

    Crane and the Purhaser  will not proceed with  the Proposed Merger or  enter
into  any agreement contemplating the Proposed  Merger unless and until they are
satisfied that the Company is then legally and contractually free to  consummate
the  Proposed Merger  and, specifically, that  the consummation  of the Proposed
Merger would not be in violation of the Danaher Agreement. The Danaher Agreement
may be terminated  by the  Company in  certain circumstances,  including if  the
Danaher Tender Offer expires or is terminated without any Shares being purchased
thereunder,  or if the consummation  of the Danaher Tender  Offer shall not have
occurred by June 30, 1994.

    If the Offer  is consummated,  the Purchaser  presently intends  to seek  to
obtain  at least  majority representation on  the Company's  Board of Directors,
and, subject to  the provisions of  the next preceding  paragraph, to cause  the
Company to enter into a definitive merger agreement with Crane and the Purchaser
providing  for the  Proposed Merger,  and to submit  the Proposed  Merger to the
Company's stockholders for approval. If the Proposed Merger is submitted to  the
Company's  stockholders, Crane and Purchaser intend  to vote all Shares acquired
pursuant to the  Offer and  otherwise owned  by them  in favor  of the  Proposed
Merger.

    If  none of the Offer, the Danaher Tender Offer or the Tyco Tender Offer can
be consummated by reason of the Rights, the applicability of Section 203 of  the
Delaware  Law or otherwise, the Purchaser and Crane may determine to abandon the
Offer and  instead  seek  majority  representation on  the  Company's  Board  of
Directors  through  a proxy  contest  at the  Company's  next annual  meeting of
stockholders. The ability of  the Purchaser to succeed  in such a proxy  contest
would depend on events and conditions at that time. No assurance can be given as
to  whether the Purchaser would proceed with such  a contest at that time or, if
it chooses to pursue such a contest, whether the Purchaser would prevail. If the
Purchaser succeeded in obtaining majority representation on the Company's  Board
of  Directors through such a  proxy contest, the Purchaser  would then cause the
Company to redeem the Rights and  enter into a definitive merger agreement  with
Crane  and the Purchaser providing  for an acquisition of  the Company by Crane,
which  merger  agreement  would   render  Section  203   of  the  Delaware   Law
inapplicable. However, given the significant delay inherent in postponing action
until  the Company's  next annual  meeting, no assurance  can be  given that any
merger transaction proposed by the Purchaser or  Crane at that time would be  on
the same terms as the Proposed Merger.

                                       24
<PAGE>
    If  the Purchaser obtains majority representation  on the Company's Board of
Directors and the Purchaser is unable for any reason to consummate the  Proposed
Merger,  the  Purchaser  would nonetheless  seek  to exercise  control  over the
business and affairs of the Company.

    AS  A  RESULT  OF  THE  FACTORS   DESCRIBED  IN  THIS  OFFER  TO   PURCHASE,
SUBSTANTIALLY  ALL OF  WHICH ARE CURRENTLY  WITHIN THE CONTROL  OF THE COMPANY'S
BOARD OF DIRECTORS, NO ASSURANCE CAN BE  GIVEN THAT THE PROPOSED MERGER WILL  BE
CONSUMMATED OR AS TO THE TIMING THEREOF. IF THE TIMING OF THE PROPOSED MERGER IS
SUBSTANTIALLY   DELAYED,  NO  ASSURANCE  CAN  BE  GIVEN  AS  TO  THE  PER  SHARE
CONSIDERATION THAT WOULD BE PAID.

    In connection with the Offer  and during its pendency,  or in the event  the
Offer  is terminated or not consummated (by reason of the Rights, Section 203 of
the Delaware Law or otherwise), or after the expiration of the Offer and pending
the consummation  of the  Proposed Merger,  in accordance  with applicable  law,
Crane  and the Purchaser may explore any  and all options which may be available
to them and Crane and the Purchaser may, without limitation, seek control of the
Company through  a proxy  contest or,  after expiration  or termination  of  the
Offer,  seek  to  acquire  additional  Shares,  through  open  market purchases,
privately  negotiated  transactions,  a  tender  offer  or  exchange  offer   or
otherwise,  upon such terms and at such prices as it may determine, which may be
more or less than the price  to be paid pursuant to  the Offer and could be  for
cash or other consideration.

    Whether  or not the Offer is  consummated, the Purchaser reserves the right,
subject to applicable legal restrictions, to sell or otherwise dispose of any or
all Shares acquired pursuant to the Offer or otherwise. Such transactions may be
effected on terms and at prices as it shall determine which may be more or  less
than  the price to be paid pursuant to the  Offer and could be for cash or other
consideration.

    The making of the Offer has enabled Crane and the Purchaser to commence  the
process  of seeking regulatory approvals for its acquisition of the Company. See
Section 15.  In addition,  by tendering  Shares into  the Offer,  the  Company's
stockholders  will be given the opportunity to express to the Company's Board of
Directors that they  wish to  be able  to accept the  Offer and  to approve  the
Proposed Merger or a similar transaction with the Company.

    THE  OFFER DOES NOT CONSTITUTE A SOLICITATION  OF PROXIES FOR ANY MEETING OF
THE COMPANY'S STOCKHOLDERS. ANY SUCH  SOLICITATION WHICH THE PURCHASER OR  CRANE
MIGHT  MAKE WOULD  BE MADE ONLY  PURSUANT TO SEPARATE  PROXY MATERIALS COMPLYING
WITH THE REQUIREMENTS OF SECTION 14(A) OF THE EXCHANGE ACT.

PLANS FOR THE COMPANY

    If and to the  extent that Crane  and the Purchaser  acquire control of  the
Company or otherwise obtain access to the books and records of the Company, in a
manner consistent with the Company's existing contractual obligations, Crane and
the Purchaser intend to conduct a detailed review of the Company and its assets,
corporate  structure, dividend  policy, capitalization,  operations, properties,
policies, management and personnel and consider  what, if any, changes would  be
desirable  in light of the circumstances which then exist. Such strategies could
include, among other things, changes in the Company's business (including  asset
sales),   corporate  structure,   Charter,  Bylaws,   capitalization,  Board  of
Directors, management or dividend policy.  As described herein, the  Purchaser's
ability  to effect any such changes or  transactions and the timing thereof will
depend in part  upon the Purchaser's  ability to  gain control of  the Board  of
Directors,  as well as upon  the provisions of the  Charter, the Bylaws, Section
203 of the Delaware Law and  the Company's existing contractual obligations,  to
the extent applicable.

    Except  as described in this Offer to Purchase, Crane and the Purchaser have
no present  plans  or  proposals  that would  result  in  (i)  an  extraordinary
corporate  transaction,  such  as  a  merger,  consolidation,  reorganization or
liquidation involving the  Company or any  of its subsidiaries,  (ii) a sale  or
transfer  of  a  material  amount  of  assets  of  the  Company  or  any  of its
subsidiaries, (iii) any change in the  present board of directors or  management
of  the  Company, (iv)  any  material change  in  the present  capitalization or
dividend policy of the Company, (v)  any other material change in the  Company's
corporate  structure  or business,  (vi) causing  a class  of securities  of the
Company to be delisted from a

                                       25
<PAGE>
national securities exchange or  to cease to  be authorized to  be quoted in  an
inter-dealer quotation system of a registered national securities association or
(vii)  a  class  of  equity  securities of  the  Company  becoming  eligible for
termination of registration pursuant to Section 12(g)(4) of the Exchange Act.

THE CHARTER AND BYLAWS

    The Company has announced that its 1994 Annual Meeting of Stockholders  will
be  held May  5, 1994  (the "Annual  Meeting"). According  to publicly available
information, two of the five seats on the Board of Directors of the Company  are
expected  to be filled at that time. According to published reports, the Company
has appointed a nominating committee  to seek two additional directors,  thereby
increasing  the size of the Board to seven. Neither Crane nor Purchaser is aware
when these additional directors might be up for election by the stockholders.

    The Charter provides  that the  number of Directors  shall be  fixed in  the
Bylaws, but in no event less than three nor more than twelve. The Bylaws fix the
number  of directorships at four, unless  increased or decreased by a resolution
of the Board of Directors. The Bylaws can be amended by the affirmative vote  of
a  majority  of  the Shares  present  in person  or  by  proxy at  a  meeting of
stockholders, assuming  a quorum  is present,  or by  the written  consent of  a
majority  of the  outstanding Shares.  The Bylaws do  not provide  for a special
meeting of stockholders  called by  any person other  than the  Chairman of  the
Board,  or in his absence the President, or a majority of the Board of Directors
of the Company. The Bylaws do not contain any provisions regulating  stockholder
proposals or director nominations at the Annual Meeting.

    The  Charter and  the Bylaws  filed with  the Commission  contain provisions
which could delay or prohibit the Purchaser and Crane from obtaining control  of
the  Board of Directors.  The Charter and  the Bylaws provide  that the Board of
Directors shall be  divided into  three substantially equal  classes, with  each
class  elected for a term of three years. The terms of the classes are staggered
so that at  each annual  meeting of  stockholders of  the Company  one class  of
directors  is elected  for a three-year  term or until  the resignation, removal
(with or without cause) or death, if earlier, of the directors of such class. In
addition, when any director is elected by the Board to fill a vacancy, the  term
of  that director ends  at the next election  of the class  in which such person
shall have been appointed. The Charter  generally provides that any director  or
the  entire  Board of  Directors  may be  removed, but  only  for cause,  by the
affirmative vote of holders of not less  than a majority of the total number  of
the  Shares  entitled to  vote in  elections of  directors at  a meeting  of the
stockholders called for that purpose. The Charter also provides that any vacancy
which results from any cause may be  filled by a majority of the directors  then
in  office, although less  than a quorum.  In addition, the  stockholders of the
Company may fill any vacancies by a plurality of the Shares present in person or
by proxy at a meeting of stockholders,  assuming a quorum is present, or by  the
written consent of a majority of the outstanding Shares. Declassification of the
Company's  Board of Directors requires an amendment to the Charter which must be
approved by the Board of  Directors and receive the  affirmative vote of 80%  of
the  total  number  of Shares  entitled  to vote  thereon.  As a  result  of the
foregoing provisions, it  is possible that  the Purchaser would  not be able  to
replace  a majority of the  directors of the Company  prior to the second annual
meeting of stockholders  held after  the Purchaser  acquired a  majority of  the
Shares.

    The  Charter also  provides that  any merger  or consolidation  to which the
Company and any Interested Entity (as  defined below) or a subsidiary or  parent
of  either of them are parties,  may not be effected unless  at least 80% of all
votes represented by all voting securities issued by the Company and outstanding
at the time the vote on the matter shall be taken are cast in favor thereof.  As
used  herein:  (a)  the  term  "Interested  Entity"  means  any  natural person,
corporation, partnership, organization, group of  persons acting in concert,  or
any  other entity which either (i) owns  (of record or beneficially, or directly
or indirectly) 5% or more of the outstanding shares of any class of stock of the
Company or  (ii) directly,  or indirectly  through one  or more  intermediaries,
controls,  is controlled  by, or  is under  common control  with any "Interested
Entity"; and (b) the  term "voting securities" means  securities the holders  of
which  would be entitled to  vote on the matter in  question if such matter were
presented

                                       26
<PAGE>
to a meeting of security holders at which every holder of every security  issued
by  the Company were present.  Crane currently is, and  upon consummation of the
Offer, the  Purchaser  would  be,  an Interested  Entity  for  purposes  of  the
foregoing Charter provision.

    If,  following consummation of the Offer, the members of the Company's Board
of Directors in  office at  such time  were to  refuse to  approve the  Proposed
Merger  (or any other  transaction or separate action  proposed by the Purchaser
that required approval of the Company's  Board of Directors), the Purchaser,  in
order  to  consummate the  Proposed  Merger (or  any  such other  transaction or
corporate action),  would first  have to  replace  at least  a majority  of  the
Company's  Board  of  Directors with  its  own  designees. As  a  result  of the
classified board provisions contained  in the Charter and  the Bylaws, at  least
two  annual meetings of  the Company's stockholders could  be required to enable
nominees of  the Purchaser  to comprise  a majority  of the  Company's Board  of
Directors. If the current Board of Directors of the Company opposes the Offer or
the Proposed Merger, Crane intends to seek to take any action necessary to place
a  majority  of its  designees on  the Company's  Board of  Directors, including
without limitation, seeking to  amend the Charter and  the Bylaws to remove  the
provisions  described above or to increase the  number of seats available on the
Company's Board of Directors  for its nominees and  to solicit proxies from  the
stockholders  of the Company for use at the next annual meeting of the Company's
stockholders for  the  purpose  of  electing new  directors  designated  by  the
Purchaser.

    THE  OFFER DOES NOT CONSTITUTE A SOLICITATION  OF PROXIES FOR ANY MEETING OF
THE COMPANY'S STOCKHOLDERS. ANY SUCH  SOLICITATION WHICH THE PURCHASER OR  CRANE
MIGHT  MAKE WOULD  BE MADE ONLY  PURSUANT TO SEPARATE  PROXY MATERIALS COMPLYING
WITH THE REQUIREMENTS OF SECTION 14(A) OF THE EXCHANGE ACT.

CREDIT AGREEMENT

    According to the Company's Current Report on Form 8-K dated October 8,  1993
(the  "Company 8-K"), the  Company entered into  a Credit Agreement  dated as of
December 3, 1993 with  Continental Bank, as Agent,  and various other  financial
institutions  (the "Credit Agreement"). According to the Company 8-K, the Credit
Agreement provides the Company with  (i) a term loan  of $30 million, which  was
substantially used to finance various business acquisitions and (ii) a revolving
line  of credit of $15 million. The  Credit Agreement provides that an "Event of
Default" shall  occur under  the Credit  Agreement  if any  person or  group  of
persons  (within the  meaning of  Section 13  or 14  of the  Exchange Act) shall
acquire beneficial ownership (within  the meaning of  Rule 13d-3 promulgated  by
the Commission under the Exchange Act) of 20% or more of the outstanding Shares.
Upon  an Event  of Default, all  amounts outstanding under  the Credit Agreement
will become immediately due and payable. Consummation of the Offer may give rise
to an Event  of Default  under the  Credit Agreement.  In that  event, Crane  or
Purchaser  may loan to the Company the funds required to repay such indebtedness
(see Section  12).  The  foregoing  summary of  the  provisions  of  the  Credit
Agreement  is qualified in its entirety by reference to the Company 8-K, and the
Credit Agreement attached as  an exhibit thereto, which  may be obtained in  the
manner  set  forth in  Section 8  (except that  copies may  not be  available at
regional offices of the Commission).

DELAWARE BUSINESS COMBINATION LAW

    Section 203 of the Delaware Law provides that a Delaware corporation such as
the Company may  not engage in  any Business Combination  (defined to include  a
variety  of transactions,  including a  merger) with  any Interested Stockholder
(defined generally as any person that, directly or indirectly, beneficially owns
15% or  more  of  the outstanding  voting  stock  of the  corporation),  or  any
affiliate  of an Interested Stockholder, for three years after the date on which
the Interested  Stockholder became  an  Interested Stockholder.  The  three-year
prohibition on Business Combinations with Interested Stockholders (the "Business
Combination Prohibition") does not apply if certain conditions, described below,
are  satisfied.  Section 203  of the  Delaware Law  provides that  a "beneficial
owner" of voting stock  includes any person who,  individually or together  with
any  of its affiliates or associates, has  (i) the right to acquire voting stock
(whether such right  is exercisable  immediately or  only after  the passage  of
time)  pursuant  to  any agreement,  arrangement  or understanding  or  upon the
exercise  of  conversion  rights,  exchange  rights,  warrants  or  options   or
otherwise, (ii) the right to vote such stock

                                       27
<PAGE>
pursuant to any agreement, arrangement or understanding, or (iii) any agreement,
arrangement  or understanding for the purposes  of acquiring, holding, voting or
disposing of such stock with any  other person that beneficially owns,  directly
or indirectly, such stock.

    The Business Combination Prohibition does not apply to a particular Business
Combination between a corporation and a particular Interested Stockholder if (i)
prior  to the date such Interested Stockholder became an Interested Stockholder,
the board  of  directors  of  such  corporation  approves  either  the  Business
Combination  or the  transaction which resulted  in the  stockholder becoming an
Interested Stockholder,  or  (ii) upon  consummation  of the  transaction  which
resulted  in the stockholder becoming  an Interested Stockholder, the Interested
Stockholder  owned  at  least  85%  of  the  voting  stock  of  the  corporation
outstanding  at the  time the transaction  commenced, excluding  for purposes of
determining the number of shares outstanding  those shares owned by (x)  persons
who  are  directors and  also officers  and  (y) employee  stock plans  in which
employee participants do not have the right to determine confidentially  whether
shares  held subject to the plan will be tendered in a tender or exchange offer,
or (iii) on  or subsequent  to the date  the stockholder  becomes an  Interested
Stockholder,  the Business Combination is approved  by the board of directors of
such corporation and authorized at an annual or special meeting of  stockholders
by  the affirmative  vote of at  least 66  2/3% of the  outstanding voting stock
which is not owned by the Interested Stockholder.

    The restrictions contained in Section 203  of the Delaware Law do not  apply
to  a  Business  Combination  that  is proposed  prior  to  the  consummation or
abandonment of and subsequent to the  earlier of the public announcement or  the
notice  required under Section 203 of the Delaware Law of a proposed transaction
which (i) constitutes a merger or consolidation of the corporation; (ii) is with
or by a person who either was not an Interested Stockholder during the  previous
three  years or who  became an Interested  Stockholder with the  approval of the
corporation's board of  directors; and  (iii) is approved  or not  opposed by  a
majority  of  the members  of the  board of  directors then  in office  who were
directors (or  certain  successors thereto)  prior  to any  person  becoming  an
Interested Stockholder. Assuming, as Purchaser believes, that Danaher was not an
Interested  Stockholder  at  the time  the  Board  of Directors  of  the Company
approved the  Danaher  Agreement,  the  Purchaser  believes  that  the  Business
Combination Prohibition is not applicable to the Offer or the Proposed Merger.

    The foregoing summary of Section 203 of the Delaware Law does not purport to
be  complete and is qualified in its  entirety by reference to the provisions of
Section 203 of the Delaware Law.

APPRAISAL RIGHTS

    No appraisal rights are available in  connection with the Offer. Holders  of
Shares  will be  entitled to  appraisal rights  in connection  with the Proposed
Merger if  at  the record  date  with respect  to  the Proposed  Merger  certain
requirements are satisfied.

    Under  Section 262 of  the Delaware Law, appraisal  rights are not available
for the shares of any class or series  of stock which, at the record date  fixed
to  determine the stockholders entitled to receive  notice of and to vote at the
meeting of stockholders  to act upon  the agreement of  merger, were either  (i)
listed  on a  national securities  exchange or  designated as  a national market
system security on an inter-dealer quotation system by the NASD or (ii) held  of
record  by more  than 2,000  stockholders, unless the  holders of  such class or
series of stock are required by the  terms of such agreement to accept for  such
stock  anything  except (w)  shares  of stock  of  the corporation  surviving or
resulting from such merger, (x) shares  of stock of any other corporation  which
at  the  effective  date of  the  merger will  be  either listed  on  a national
securities exchange or  designated as a  national market system  security on  an
interdealer  quotation system by the  NASD or held of  record by more than 2,000
stockholders, (y)  cash  in  lieu  of  fractional  shares  of  the  corporations
described  in clauses (w) and (x) or (z)  any combination of the shares of stock
and cash in lieu  of fractional shares  described in clauses  (w), (x) and  (y).
Thus,  if the constituent  corporations to the Proposed  Merger were the Company
and the  Purchaser and  the consideration  to  be paid  in the  Proposed  Merger
consisted  entirely of cash,  appraisal rights would be  available to holders of
Shares pursuant to  the Proposed Merger.  Stockholders of the  Company may  have
certain  rights under  Section 262  of the  Delaware Law  to dissent  and demand
appraisal of, and  payment in  cash of  the fair  value of,  their Shares.  Such
rights, if the statutory

                                       28
<PAGE>
procedures  were complied  with, could lead  to a judicial  determination of the
fair value (excluding any  element of value arising  from the accomplishment  or
expectation  of  the  Proposed Merger)  required  to  be paid  in  cash  to such
dissenting holders for their Shares. Any such judicial determination of the fair
value of Shares could  be based upon considerations  other than, or in  addition
to,  the price paid in  the Offer and the market  value of the Shares, including
asset values and  the investment value  of the Shares.  The value so  determined
could be more or less than the purchase price per Share pursuant to the Offer or
the consideration per Share to be paid in the Proposed Merger.

    In addition, several decisions by Delaware courts have held that, in certain
instances, a controlling stockholder of a corporation involved in a merger has a
fiduciary  duty to the other stockholders that requires the merger to be fair to
such other stockholders.  In determining whether  a merger is  fair to  minority
stockholders,  the Delaware courts have considered, among other things, the type
and amount of consideration to be received by the stockholders and whether there
were fair dealings  among the parties.  Although the remedies  of rescission  or
rescissory damages are possible in an action challenging a merger as a breach of
fiduciary  duty, decisions  of the Delaware  courts have indicated  that in most
cases the  remedy available  in a  merger  that is  found not  to be  "fair"  to
minority  stockholders  is  a  damages  remedy  based  on  essentially  the same
principles as an appraisal.

    THE FOREGOING  SUMMARY OF  THE  RIGHTS OF  OBJECTING STOCKHOLDERS  DOES  NOT
PURPORT  TO  BE  A  COMPLETE  STATEMENT OF  THE  PROCEDURES  TO  BE  FOLLOWED BY
STOCKHOLDERS  DESIRING  TO  EXERCISE  ANY  AVAILABLE  DISSENTERS'  RIGHTS.   The
preservation  and exercise of dissenters' rights require strict adherence to the
applicable provisions of the Delaware Law.

THE RIGHTS

    The Rights are  described in  the Company's Registration  Statement on  Form
8-A, dated August 7, 1989 (the "Company 8-A"). According to the Company 8-A, the
Company  issued to each record  holder of Shares one  Right for each outstanding
share of Common Stock held of record by such holder at the close of business  on
August  7, 1989. When exercisable, unless adjusted in accordance with the Rights
Agreement, each  Right  entitles the  registered  holder to  purchase  from  the
Company  one one-thousandth  of one  share (each a  "Rights Share")  of Series A
Junior Participating Preferred Stock  (the "Series A Stock")  at a price of  $26
per  one one-thousandth of  a share (the "Right  Price"), subject to adjustment.
According to the Company's Certificate  of Designation, Preferences, and  Rights
of Series A Junior Participating Preferred Stock, each Rights Share participates
equally  with the Common Stock in dividends  (in addition to being entitled to a
preferred dividend),  to vote  with the  Common Stock  and has  priority in  the
liquidation of the Company.

    According  to the Company 8-A, the  Rights are exercisable during the period
(the "Exercise Period") (a) from, but not including, the fifth Business Day  (as
defined  in the Rights Agreement) after the  date upon which the Company's Chief
Executive Officer shall first  actually realize (i) that  a person has become  a
Major Owner (as defined in the Rights Agreement) and (ii) that such circumstance
will  be  sufficient  (absent  affirmative  action  by  the  Company's  Board of
Directors) to cause  the Exercise Period  to occur, provided  that the Board  of
Directors  of the Company  may defer such  Exercise Period, and  (b) to, but not
including, the earlier to occur  of (w) the Redemption  Date (as defined in  the
Rights  Agreement) for  such Right,  (x) the  Exchange Date  (as defined  in the
Rights Agreement) for such Right, (y) the date after issuance of such Right upon
which the Company shall acquire ownership of such Right, or (z) August 1, 1999.

    According to the Company  8-A, the Rights Agreement  provides that prior  to
the close of business on the Separation Date: (a) the Share Certificates will be
deemed  to evidence  the associated Rights  and no  separate Rights Certificates
will be issued;  (b) the record  owner of such  Shares will also  be the  record
owner  of the associated Rights; (c) the  transfer of an interest in such Shares
will automatically  constitute  a  transfer  of an  identical  interest  in  the
associated  Rights; and (d) the associated Rights  will in all other respects be
inseparable from such  Shares. "Separation  Date" means the  fifth Business  Day
after  the date  upon which  the Company's  Chief Executive  Officer shall first
actually realize (i) that any person has a Control Percentage (as defined in the
Rights Agreement) of 15% or more or that any tender offer or exchange offer  has
been    commenced    after    the    consummation    of    which    any   person

                                       29
<PAGE>
making such offer would have a Control Percentage of at least 15% if all  shares
which  it is possible to  tender in response to such  offer were tendered and if
the persons making such offer purchased  all shares which they would under  such
circumstances  be entitled to purchase by means of such offer and (ii) that such
circumstances will be  sufficient (absent  affirmative action  by the  Company's
Board  of Directors) to cause the Separation  Date to occur, provided that prior
to the date  which would  otherwise have  constituted the  Separation Date,  the
Company's  Board of  Directors may  designate any  other date  as the Separation
Date.

    According to the Company 8-A, each Right outstanding at the Exercise  Period
Initiation  Date (as defined  in the Rights  Agreement), will be  adjusted as of
that time so that  (i) the Purchase  Price Per Share (as  defined in the  Rights
Agreement) in effect immediately after such adjustment will be equal to one-half
of  the Average Fair Market Price Per Share (as defined in the Rights Agreement)
for the Shares calculated as of the Exercise Period Initiation Date and (ii) the
number of share units purchasable with every individual Right immediately  after
the  Exercise Period Initiation Date  shall be equal to  the quotient derived by
dividing $26 by  the Purchase Price  Per Share as  constituted after making  the
adjustment  prescribed  by clause  (i)  of this  sentence.  Until and  unless an
adjustment is made under the Rights Agreement, the term "share unit" as used  in
the  preceding  sentence means  .001  share of  Series  A Stock.  The adjustment
otherwise required by reason of the occurrence of the Exercise Period Initiation
Date will not be made unless the effect of such adjustment would be to  decrease
the purchase price per Share in effect immediately prior to such adjustment.

    According  to the Company 8-A, in the event that Certain Take-Out events (as
defined in the  Rights Agreement)  occur, including if  the Company  were to  be
acquired  in a merger or other business combination or more than 50% of the fair
market value or earning power of the  Company and its subsidiaries were sold  or
transferred,  each holder of a Right will  have the right to receive that number
of shares of common stock  of the Principal Acquirer  (as defined in the  Rights
Agreement)  equal to the quotient obtained by dividing $26 by 50% of the Average
Market Price Per Share of  the Principal Acquirer at  a purchase price equal  to
50%  of  such  Average Market  Price  Per  Share. Such  Principal  Acquirer will
thereafter be liable for, and  will assume, by virtue  of such Take-Out, all  of
the obligations and duties of the Company pursuant to the Rights Agreement.

    According to the Company 8-A, the Company may redeem the Rights for $.01 per
Right  ("Redemption Price") pursuant  to the Rights  Agreement. Immediately upon
the action of the  Board of Directors of  the Company authorizing redemption  of
the  Rights,  such  Rights  will  cease to  be  outstanding,  will  cease  to be
exercisable and will  cease to convey  any right  to its holder  other than  the
right to receive the Redemption Price.

    The  foregoing  summary  of the  Rights  Agreement  does not  purport  to be
complete and is qualified in  its entirety by reference  to the Company 8-A  and
the  text of the Rights Agreement as set forth as an exhibit thereto, filed with
the Commission, copies  of which  may be  obtained in  the manner  set forth  in
Section 8.

    By  letter dated March 22, 1994, the Company informed Tyco that its Board of
Directors had  on  that  date  "resolved that  if  Tyco  initiates  an  all-cash
all-Shares  tender offer at $19 per Share or  higher on or before April 4, 1994,
then (i) that tender offer and any  merger which shall follow within six  months
after conclusion of the Offer providing remaining stockholders with at least the
same  consideration per share as the consideration paid in the tender offer will
be deemed to have been  approved by the Board today  to the extent necessary  so
that  the provisions of Section 203 of the Delaware General Corporation Law will
not apply to that merger and (ii) neither that tender offer nor such merger will
cause Mark Controls' outstanding stock  purchase rights to become  exercisable."
Tyco  did commence a  tender offer complying  with such parameters  on March 24,
1994. Purchaser's  Offer  also complies  with  those parameters,  and  Purchaser
believes  that  the  Company  must  accord  to  Purchaser  essentially  the same
treatment as that accorded Tyco with respect to the Rights.

                                       30
<PAGE>
"GOING PRIVATE" TRANSACTIONS

    The Proposed Merger  would have to  comply with any  applicable federal  law
operative at the time of its consummation. The Commission has adopted Rule 13e-3
under   the  Exchange  Act  which  is  applicable  to  certain  "going  private"
transactions and  which may  under certain  circumstances be  applicable to  the
Proposed Merger. However, Rule 13e-3 would be inapplicable if (i) the Shares are
deregistered  under  the Exchange  Act  prior to  the  Proposed Merger  or other
business combination or (ii) the  Proposed Merger or other business  combination
is  consummated within one  year after the  purchase of the  Shares pursuant the
Offer and the amount  paid per Share  in the Proposed  Merger or other  business
combination  is at  least equal to  the amount paid  per Share in  the Offer. If
applicable, Rule  13e-3 requires,  among other  things, that  certain  financial
information concerning the fairness of the Proposed Merger and the consideration
offered  to  minority  stockholders  in  such  transaction  be  filed  with  the
Commission and  disclosed  to stockholders  prior  to the  consummation  of  the
Proposed Merger.

    12.   SOURCE  AND AMOUNT OF  FUNDS.  The  total amount of  funds required to
purchase all Shares that may be  tendered pursuant to this Offer, to  consummate
the  Proposed Merger,  to pay fees  and expenses  relating to the  Offer and the
Proposed Merger,  and  to  repay,  if necessary,  indebtedness  of  the  Company
approximating  $38 million  which may  be accelerated  upon consummation  of the
Offer, is  expected to  approximate  $123.8 million.  The Company  has  received
commitment  letters from  four banks for  a 3-year revolving  credit facility in
amounts of $25 million each and aggregating $100 million. Borrowings can be made
under this facility, subject to execution of a definitive loan agreement, at any
time for general corporate purposes, including acquisitions. The facility  calls
for  a commitment fee ranging from .15%  to .325%, depending upon Crane's credit
rating at the time  of the takedown  of the borrowings  under the facility.  The
interest  rates  are  based upon  a  margin  above the  stated  London Interbank
Offering Rate (LIBOR)  for any given  maturity (at margin  ranges from .225%  to
.4375%)  or upon a  margin above the CD  Rate for any  given maturity (at margin
ranges from .35% to .5625%), each depending upon the Company's credit rating  at
the time of the takedown of the borrowings under the facility. As of the date of
the  Offer,  the  entire $100  million  in  committed long  term  credit remains
available to Crane Co., subject to execution of a definitive loan agreement.

    In addition, Crane has  established uncommitted, multi-purpose money  market
borrowing  lines with each of nine banks,  ranging in amount from $10 million to
$50 million and aggregating $245 million. Borrowings can be made at any time  or
from time to time under each of these lines, up to the principal amount thereof,
for  general corporate  purposes, including  acquisitions. The  precise terms of
each borrowing, including interest rate and maturity are determined at the  time
of takedown. The interest rates are based upon a margin (agreed upon at the time
of  the borrowing) above  or below a stated  market index-offered rate available
from the lending  banks at  the time  of the  takedown. Borrowings  are made  at
durations  of overnight and up to 180  days. Borrowings are unsecured. As of the
close of business on March 29, 1994, $129 million principal amount of borrowings
were outstanding under  these lines, with  a weighted average  interest rate  of
3.7508%.  The cost of future borrowings under  these lines will depend on market
conditions, the amount and maturity  of the borrowing and credit  considerations
deemed relevant by the lending bank.

    Crane  anticipates borrowing funds from both of the above referenced sources
to pay all costs and expenses relating to the Offer and the Proposed Merger.  It
is  anticipated that borrowings  under these lines in  connection with the Offer
will be repaid  from internally-generated funds,  from further borrowings  under
these lines of credit, or from the proceeds of issuance of other debt securities
which  the Company  may issue from  time to  time in the  future. Decisions with
respect to application of  internally-generated funds, further borrowings  under
existing lines of credit and issuance of additional debt securities from time to
time  in the future  will be based  on a variety  of factors, including interest
rates and other economic conditions prevailing at the time.

    13.  DIVIDENDS AND DISTRIBUTIONS.   If, on or  after February 28, 1994,  the
Company  should  (a)  split,  combine  or otherwise  change  the  Shares  or its
capitalization, (b) acquire  presently outstanding Shares  or otherwise cause  a
reduction  in the number of  Shares, (c) issue or  sell additional Shares (other
than

                                       31
<PAGE>
the issuance of  Shares reserved  for issuance as  of February  28, 1994,  under
option  and  employee stock  purchase plans  in accordance  with their  terms as
publicly disclosed as of February 28, 1994) or any shares of any other class  of
capital  stock, other  voting securities or  any securities  convertible into or
exchangeable for, or rights, warrants  or options, conditional or otherwise,  to
acquire,  any of the foregoing,  or (d) disclose that  it has taken such action,
then, without prejudice to the Purchaser's  rights under Sections 1 and 14,  the
Purchaser,  in its  sole discretion, may  make such adjustments  in the purchase
price and  other  terms  of the  Offer  and  the Proposed  Merger  as  it  deems
appropriate  to  reflect such  split,  combination or  other  change, including,
without limitation, the number or type of securities offered to be purchased and
the consideration to be paid therefor.

    If Shares are purchased pursuant to the Offer, and, on or after February 28,
1994, the Company should declare, pay  or distribute any cash or stock  dividend
on  the Shares or any distribution  (including, without limitation, the issuance
of additional Shares pursuant to a  stock dividend or stock split, the  issuance
of  other securities or the issuance of rights (other than the separation of the
Rights from the Shares) for the purchase of any securities) with respect to  the
Shares  or  Rights  (other  than  the  Redemption  Price)  that  is  payable  or
distributable to stockholders of record on a date prior to the transfer into the
name of the  Purchaser or  its nominees or  transferees on  the Company's  stock
transfer  records of the  Shares purchased pursuant to  the Offer, then, without
prejudice to the Purchaser's  rights under Sections 1  and 14, (i) the  purchase
price  per Share payable by the Purchaser pursuant to the Offer shall be reduced
by the amount of any such cash  dividend or cash distribution and (ii) any  such
noncash  dividend, distribution, issuance,  proceeds or right  to be received by
the tendering  stockholders shall  (a) be  received and  held by  the  tendering
stockholders  for  the account  of  the Purchaser  and  will be  required  to be
promptly  remitted  and  transferred  by  each  tendering  stockholder  to   the
Depositary  for  the  account  of  the  Purchaser,  accompanied  by  appropriate
documentation of  transfer,  or  (b)  at the  direction  of  the  Purchaser,  be
exercised  for the benefit of the Purchaser,  in which case the proceeds of such
exercise will promptly be remitted to the Purchaser. Pending such remittance and
subject to applicable  law, the  Purchaser will be  entitled to  all rights  and
privileges  as  owner  of  any such  noncash  dividend,  distribution, issuance,
proceeds or right and may withhold the entire purchase price or deduct from  the
purchase  price the amount of  value thereof, as determined  by the Purchaser in
its sole discretion.

    14.  CERTAIN CONDITIONS OF THE  OFFER.  Notwithstanding any other  provision
of  the Offer, and in addition to (and not limitation of) the Purchaser's rights
to extend and amend the Offer at any time in its sole discretion, the  Purchaser
shall  not be required to accept for payment or, subject to any applicable rules
and regulations of the  Commission, including Rule  14e-1(c) under the  Exchange
Act (relating to the Purchaser's obligation to pay for or return tendered Shares
promptly  after  termination or  withdrawal of  the Offer),  pay for  any Shares
tendered and  may  delay  the acceptance  for  payment  of or,  subject  to  the
restriction  referred to above, payment for,  any Shares tendered, and may amend
or terminate  the  Offer  (whether  or not  any  Shares  have  theretofore  been
purchased or paid for) if, in the sole judgment of the Purchaser, (i) any of the
conditions  to consummation of the  Offer set forth in  the Introduction to this
Offer to  Purchase (relating  to the  Minimum Number  of Shares  Condition,  the
Rights  Condition and the Section 203 Condition) has not been satisfied; or (ii)
at any time on or after March 29, 1994 and before acceptance for payment of,  or
payment  for, such Shares  any of the  following events shall  occur or shall be
deemed by Crane or the Purchaser to have occurred:

        (a) there shall have been threatened, instituted or pending any  action,
    proceeding,   application  or  counterclaim  by   or  before  any  court  or
    governmental, regulatory or  administrative agency,  authority or  tribunal,
    domestic,   foreign  or  supranational  (other  than  actions,  proceedings,
    applications or counterclaims filed or initiated by Crane or the Purchaser),
    which (i) seeks to challenge the acquisition by the Purchaser of the Shares,
    restrain, prohibit or delay the making  or consummation of the Offer or  the
    Proposed  Merger or any  other merger or  business combination involving the
    Purchaser  or  any  of  its  affiliates  and  the  Company  or  any  of  its
    subsidiaries,  prohibit the  performance of  any of  the contracts  or other
    agreements entered into by Crane or any of its affiliates in connection with
    the acquisition of the Company, or obtain any damages in connection with any
    of the foregoing, (ii) seeks to make  the purchase of, or payment for,  some
    or all of the

                                       32
<PAGE>
    Shares  pursuant to  the Offer, the  Proposed Merger  or otherwise, illegal,
    (iii) seeks to impose limitations on the ability of the Purchaser, Crane  or
    the   Company  or  any  of   their  respective  affiliates  or  subsidiaries
    effectively to acquire  or hold, or  requiring the Purchaser,  Crane or  the
    Company  or any of their respective affiliates or subsidiaries to dispose of
    or hold  separate,  any  portion  of  the assets  or  the  business  of  the
    Purchaser,  Crane or their affiliates or the Company or its subsidiaries, or
    impose limitations on the ability of the Purchaser, Crane or the Company  or
    any  of their respective affiliates or  subsidiaries to continue to conduct,
    own or  operate  all  or any  portion  of  their businesses  and  assets  as
    heretofore  conducted, owned or operated, (iv) seeks to impose or may result
    in material limitations on  the ability of the  Purchaser or Crane or  their
    affiliates  to exercise full rights of  ownership of the Shares purchased by
    them, including, but not limited to, the right to vote the Shares  purchased
    by  them  on  all matters  properly  presented  to the  stockholders  of the
    Company, or the right to vote any shares of capital stock of any  subsidiary
    directly  or indirectly owned by  the Company, (v) may  result in a material
    diminution in the benefits expected to be derived by the Purchaser and Crane
    as a result  of the transactions  contemplated by the  Offer, including  the
    Proposed  Merger, (vi)  seeks to impose  voting, procedural,  price or other
    requirements in  addition  to  those  under the  Delaware  Law  and  federal
    securities laws (each as in effect on the date of this Offer to Purchase) or
    any material condition to the Offer that is unacceptable to the Purchaser or
    Crane or (vii) challenges or adversely affects the financing of the Offer or
    the Proposed Merger; or

        (b) other than the application of any waiting periods under the HSR Act,
    and  the necessity for approvals and  other actions by any domestic, foreign
    or  supranational   governmental,  administrative   or  regulatory   agency,
    authority  or tribunal  described in paragraph  (k) below,  there shall have
    been proposed,  sought, promulgated,  enacted, entered,  enforced or  deemed
    applicable  to the Offer or the Proposed  Merger by any domestic, foreign or
    supranational government or any  governmental, administrative or  regulatory
    authority  or  agency or  by  any court  or  tribunal, domestic,  foreign or
    supranational, any  statute, rule,  regulation, judgment,  decree, order  or
    injunction  that  might,  directly  or  indirectly,  result  in  any  of the
    consequences referred  to in  clauses  (i) through  (vii) of  paragraph  (a)
    above; or

        (c)  any  change (or  any condition,  event  or development  involving a
    prospective change) shall have  occurred or be  threatened in the  business,
    properties,   assets,  liabilities,  capitalization,  stockholders'  equity,
    condition (financial  or  otherwise), operations,  licenses  or  franchises,
    results   of  operations  or  prospects  of   the  Company  or  any  of  its
    subsidiaries, or in general economic  or financial market conditions in  the
    United  States or  abroad, which  are or  may be  materially adverse  to the
    Company or any of its subsidiaries or its stockholders, or the market  price
    of,  or trading in, the Shares, or  the Purchaser shall have become aware of
    any facts which are or may be  materially adverse with respect to the  value
    of  the Company or any of its subsidiaries or the value of the Shares to the
    Purchaser and Crane or any of their affiliates; or

        (d) there shall have occurred (i) any general suspension of trading  in,
    or  limitation on prices for, securities on any national securities exchange
    or in the over-the-counter market in the United States, (ii) the declaration
    of a banking moratorium or any suspension of payments in respect of banks in
    the United States,  (iii) any material  adverse change (or  any existing  or
    threatened  condition, event or development involving a prospective material
    adverse change) in United States or  any other currency exchange rates or  a
    suspension   of,  or  a  limitation  on,  the  markets  therefor,  (iv)  the
    commencement of a war, armed hostilities or other international or  national
    calamity  directly  or  indirectly  involving  the  United  States,  (v) any
    limitations (whether or not mandatory) imposed by any governmental authority
    on, or any event which might have material adverse significance with respect
    to, the nature  or extension  of credit or  further extension  of credit  by
    banks  or other lending institutions, (vi) any significant adverse change in
    securities or financial markets in  the United States or abroad,  including,
    without  limitation,  a decline  of at  least  15% in  either the  Dow Jones
    Average of Industrial Stocks  or the Standard &  Poor's 500 Index from  that
    existing  at the close of business on March 29, 1994 or (vii) in the case of
    any of the foregoing, a material acceleration or worsening thereof; or

                                       33
<PAGE>
        (e) the  Company or  any  of its  subsidiaries  shall have  (i)  issued,
    distributed,  pledged  or sold,  or  authorized, proposed  or  announced the
    issuance, distribution, pledge or sale of (A) any shares of capital stock of
    any  class  (including,  without  limitation,  the  Shares),  or  securities
    convertible  into or exchangeable for any  such shares, or any rights (other
    than the  Rights),  warrants, or  options  to  acquire any  such  shares  or
    convertible  or exchangeable securities,  other than the  issuance of Shares
    reserved for issuance on December 31, 1993 pursuant to the exercise of  then
    outstanding stock options or the employee stock purchase plan of the Company
    (in  each case  in accordance with  the publicly disclosed  terms thereof on
    such date) or  (B) any other  securities in respect  of, in lieu  of, or  in
    substitution  for, Shares outstanding  on March 29,  1994, (ii) purchased or
    otherwise acquired  or caused  a reduction  in, or  proposed or  offered  to
    purchase or otherwise acquire, any Shares or other securities of the Company
    (except  for redemption of  the Rights in  accordance with the  terms of the
    Rights Agreement), (iii) declared  or paid any  dividend or distribution  on
    any  shares  of  capital stock  (other  than  a distribution  of  the Rights
    Certificates in accordance with  the terms of the  Rights Agreement and,  in
    the  event the  Rights are  redeemed, the  Redemption Price),  or issued, or
    authorized,  recommended  or  proposed  the   issuance  of,  or  any   other
    distribution  in respect of, any share  of capital stock, whether payable in
    cash, securities or  other property,  or altered  or proposed  to alter  any
    material term of any outstanding security, (iv) issued, distributed or sold,
    or  authorized or  proposed the issuance,  distribution or sale  of any debt
    securities or  any  securities convertible  into  or exchangeable  for  debt
    securities  or any rights, warrants or  options entitling the holder thereof
    to purchase  or  otherwise acquire  any  debt securities,  or  incurred,  or
    authorized  or  proposed  the incurrence  of,  any  debt other  than  in the
    ordinary course of business and consistent  with past practice, or any  debt
    containing  burdensome covenants,  (v) authorized,  recommended, proposed or
    publicly announced  its intention  to enter  into or  cause (A)  any  merger
    (other  than the Proposed  Merger), consolidation, liquidation, dissolution,
    business combination,  joint venture,  acquisition of  assets or  securities
    (other  than  a  redemption  of  the Rights)  or  disposition  of  assets or
    securities other than in the ordinary  course of business, (B) any  material
    change  in  its capitalization,  (C) any  release  or relinquishment  of any
    material contract rights  or (D) any  comparable event not  in the  ordinary
    course  of business, (vi)  authorized, recommended or  proposed or announced
    its intention to authorize, recommend or propose any transaction which could
    adversely affect  the  value  of  the Shares,  (vii)  proposed,  adopted  or
    authorized  any  amendment  (other  than  any  amendment  which  delays  the
    Separation Date) to its Charter or Bylaws or similar organization  documents
    or the Rights Agreement or (viii) agreed in writing or otherwise to take any
    of the foregoing actions, or the Purchaser or Crane shall have learned about
    any  such action which shall not  have been previously publicly disclosed by
    the Company; or

        (f) a  tender  or  exchange  offer  for  some  portion  or  all  of  any
    outstanding  securities of the Company or any of its subsidiaries (including
    the Shares or Rights) shall have been publicly proposed to be made or  shall
    have  been  made by  another person  (including  the Company  or any  of its
    subsidiaries or affiliates), or there shall have been announced any increase
    in the tender offer price or material change in the terms or conditions with
    respect to either the Danaher Tender Offer  or the Tyco Tender Offer, or  it
    shall  have been  publicly disclosed  or the  Purchaser or  Crane shall have
    learned that  (i) any  person,  entity or  "group"  (as defined  in  Section
    13(d)(3)  of the  Exchange Act) shall  have acquired or  proposed to acquire
    more than  5%  of any  class  or series  of  capital stock  of  the  Company
    (including  the Shares  or Rights)  or its  subsidiaries or  shall have been
    granted any option or right to acquire  more than 5% of any class or  series
    of  capital stock  of the  Company (including the  Shares or  Rights) or its
    subsidiaries, other  than acquisitions  of Shares  for bona  fide  arbitrage
    positions,  (ii)  any  such  person,  entity  or  group  which  has publicly
    disclosed any such  ownership of  more than  5% of  any class  or series  of
    capital  stock  of  the Company  (including  the  Shares or  Rights)  or its
    subsidiaries prior to  March 29,  1994 shall  have acquired  or proposed  to
    acquire  additional shares of  any class or  series of capital  stock of the
    Company (including the  Shares or Rights)  or its subsidiaries  constituting
    more  than 1% of such class or series  or shall have been granted any option
    or right to acquire more than 1% of such class

                                       34
<PAGE>
    or series of capital stock of  the Company (including the Shares or  Rights)
    or  its subsidiaries,  (iii) any  person, entity  or "group"  (as defined in
    Section 13(d)(3) of the Exchange Act) which has publicly disclosed ownership
    of more than  5% of the  Shares prior  to March 29,  1994, including  Shares
    acquired  for bona fide arbitrage positions, shall have acquired or proposed
    to acquire, including through formation of  such a group or augmentation  of
    such  a group,  additional Shares  so as  to increase  such ownership  to in
    excess of 10% of  the Shares, (iv)  any group shall  have been formed  which
    beneficially  owns more than 5%  of any class or  series of capital stock of
    the Company (including the  Shares or Rights) or  its subsidiaries, (v)  any
    person, entity or group shall have entered into a definitive agreement or an
    agreement  in principle or made a proposal with respect to a tender offer or
    exchange offer for the Shares or Rights or a merger, consolidation or  other
    business  combination with or involving the  Company or its subsidiaries, or
    there shall  have  been  announced  any material  change  in  the  terms  or
    conditions  of the  Danaher Agreement, or  (vi) any person,  entity or group
    shall have filed a Premerger Notification and Report Form under the HSR  Act
    in  order to, or made a public announcement reflecting an intent to, acquire
    the Company or assets or securities of the Company or its subsidiaries; or

        (g) (i)  the Company,  the Purchaser  and Crane  shall have  reached  an
    agreement  or understanding that  the Offer be terminated  or amended or the
    payment for Shares  be postponed  pursuant thereto, or  (ii) the  Purchaser,
    Crane  or  any of  their  affiliates shall  have  entered into  a definitive
    agreement or  announced  an  agreement  in principle  with  respect  to  the
    Proposed Merger or any other business combination with the Company or any of
    its  affiliates or the purchase of any material portion of the securities or
    assets of the Company or any of its subsidiaries; or

        (h) the Company or any of  its subsidiaries shall have entered into  any
    employment,  severance or similar agreement, arrangement or plan with or for
    the benefit  or  any  of  its  employees or  entered  into  or  amended  any
    agreements,  arrangements  or  plans  so  as  to  provide  for  increased or
    accelerated payment or funding  of the benefits to  any such employees as  a
    result  of or in connection with  the transactions contemplated by the Offer
    or the Proposed Merger or otherwise amended any such agreement,  arrangement
    or  plan  to make  the  same more  favorable to  any  such employee,  or the
    Purchaser or Crane shall have learned about any such action which shall  not
    have been previously publicly disclosed by the Company; or

        (i)  the Purchaser  or Crane  shall become  aware (i)  that any material
    contractual right  of  the Company  or  any  of its  subsidiaries  shall  be
    impaired  or otherwise  adversely affected  or that  any material  amount of
    indebtedness of  the  Company  or  any  of  its  subsidiaries  shall  become
    accelerated  or otherwise become due or become subject to acceleration prior
    to its stated due date, in any case  with or without notice or the lapse  of
    time  or  both  as  a  result of  or  in  connection  with  the transactions
    contemplated by the Offer  or the Proposed Merger  or (ii) of any  covenant,
    term  or  condition in  any of  the  Company's or  any of  its subsidiaries'
    instruments or agreements that has or may have (whether considered alone  or
    in  the  aggregate with  other covenants,  terms  or conditions)  a material
    adverse  effect  on  (A)  the  business,  properties,  assets,  liabilities,
    capitalization,  stockholders' equity,  condition (financial  or otherwise),
    operations, licenses or  franchises, results of  operations or prospects  of
    the  Company or any of its subsidiaries  (including, but not limited to, any
    event of default that may ensue as a result of the consummation of the Offer
    or the acquisition of control of the  Company or any of its subsidiaries  or
    the Proposed Merger), (B) the value of the Shares in the hands of Crane, the
    Purchaser  or  any  of  their  affiliates or  (C)  the  consummation  by the
    Purchaser or  any of  its affiliates  of the  Proposed Merger  or any  other
    business combination involving the Company; or

        (j)    except as  may be  required by  law,  the Company  or any  of its
    subsidiaries shall have taken any action to terminate or amend any  employee
    benefit plan (as defined in Section 3(2) of the Employment Retirement Income
    Security Act of 1974, as amended) of the Company or any of its subsidiaries,
    or  the Purchaser or Crane shall have learned of any such action or possible
    action which  shall  not have  been  previously publicly  disclosed  by  the
    Company; or

                                       35
<PAGE>
        (k)  any waiting periods under the HSR Act applicable to the purchase of
    the Shares pursuant to the Offer shall not have expired or been  terminated,
    or any other approval, permit, authorization, consent or other action of any
    domestic   (federal  or  state),   foreign  or  supranational  governmental,
    administrative or regulatory agency, authority or tribunal (including  those
    described  in Section 15) shall not have been obtained on terms satisfactory
    to Crane in its sole discretion;

which, in  the sole  judgment  of Crane  and the  Purchaser,  in any  case,  and
regardless  of the circumstances  (including any action or  inaction by Crane or
the Purchaser or their affiliates) giving  rise to any such condition, makes  it
inadvisable  to proceed with  the Offer or  with such acceptance  for payment or
payment for Shares.

    The foregoing conditions are  for the sole benefit  of the Purchaser,  Crane
and their affiliates and may be asserted by the Purchaser or Crane regardless of
the  circumstances (including, without limitation, any action or inaction by the
Purchaser or Crane or their affiliates) giving rise to any such condition or may
be waived by the  Purchaser or Crane in  whole or in part  from time to time  in
their  sole discretion.  The failure by  the Purchaser  or Crane at  any time to
exercise any of the foregoing  rights shall not be deemed  a waiver of any  such
right  and each such right shall be deemed  an ongoing right and may be asserted
at any time and from time to  time. Any determination by the Purchaser or  Crane
concerning  any of the  events described in  this Section 14  shall be final and
binding on all parties.

    15.  CERTAIN LEGAL  MATTERS; REQUIRED REGULATORY APPROVALS.   Except as  set
forth in this Offer to Purchase, based on a review of publicly available filings
by  the Company  with the  Commission and  other publicly  available information
regarding the Company, the Purchaser and Crane are not aware of any licenses  or
regulatory  permits that would be  material to the business  of the Company, and
its subsidiaries, taken as a whole, and that might be adversely affected by  the
Purchaser's  acquisition of Shares (and the indirect acquisition of the stock of
the Company's subsidiaries) as contemplated herein, or any filings, approvals or
other actions by  or with  any domestic, foreign  or supranational  governmental
authority or administrative or regulatory agency that would be required prior to
the  acquisition of  Shares (or  the indirect  acquisition of  the stock  of the
Company's subsidiaries) by the Purchaser  pursuant to the Offer as  contemplated
herein.  Should any such approval  or other action be  required, there can be no
assurance that  any such  additional approval  or action,  if needed,  would  be
obtained  without substantial conditions or  that adverse consequences might not
result to the  Company's business,  or that certain  parts of  the Company's  or
Crane's  business might  not have to  be disposed  of or held  separate or other
substantial conditions complied with in order to obtain such approval or  action
or  in the event that such approvals were  not obtained or such actions were not
taken. The Purchaser's obligation to purchase  and pay for Shares is subject  to
certain   conditions,  including  conditions  with  respect  to  litigation  and
governmental actions. See the Introduction and Section 14 for certain conditions
to the Offer, including with respect to litigation and governmental actions.

    STATE TAKEOVER LAWS.   A  number of  states (including  Delaware, where  the
Company  is  incorporated)  have  adopted takeover  laws  and  regulations which
purport, to varying degrees, to be applicable to attempts to acquire  securities
of  corporations which are incorporated in such states or which have substantial
assets, security holders,  principal executive  offices or  principal places  of
business  therein. To  the extent  that certain  provisions of  certain of these
state takeover statutes purport  to apply to the  Offer, the Purchaser  believes
that  such laws  conflict with  federal law  and constitute  an unconstitutional
burden on interstate commerce. In 1982, the Supreme Court of the United  States,
in  EDGAR  V. MITE  CORP., invalidated  on  constitutional grounds  the Illinois
Business Takeovers Statute,  which as  a matter  of state  securities law,  made
takeovers  of corporations meeting certain  requirements more difficult, and the
reasoning in such decision  is likely to apply  to certain other state  takeover
statutes.  In 1987,  however, in  CTS CORP.  V. DYNAMICS  CORP. OF  AMERICA, the
Supreme Court of the United  States held that the State  of Indiana could, as  a
matter  of  corporate law  and, in  particular, those  aspects of  corporate law
concerning  corporate  governance,   constitutionally  disqualify  a   potential
acquiror from

                                       36
<PAGE>
voting  on the affairs of a target corporation without the prior approval of the
remaining stockholders,  provided  that such  laws  were applicable  only  under
certain  conditions. Subsequently,  in TLX ACQUISITION  CORP. V.  TELEX CORP., a
Federal district  court  in  Oklahoma  ruled that  the  Oklahoma  statutes  were
unconstitutional  insofar  as they  apply  to corporations  incorporated outside
Oklahoma  in  that  they  would   subject  such  corporations  to   inconsistent
regulations.  Similarly, in TYSON FOODS, INC.  V. MCREYNOLDS, a Federal district
court  in   Tennessee  ruled   that  four   Tennessee  takeover   statutes   are
unconstitutional as applied to corporations incorporated outside Tennessee. This
decision  was  affirmed by  the United  States  Court of  Appeals for  the Sixth
Circuit. In December, 1988,  a Federal district court  in Florida held in  GRAND
METROPOLITAN  PLC V. BUTTERWORTH, that the  provisions of the Florida Affiliated
Transactions  Act  and   the  Florida   Control  Share   Acquisition  Act   were
unconstitutional as applied to corporations incorporated outside of Florida.

    The Company, directly or through subsidiaries, conducts business in a number
of  states throughout the  United States, some of  which have enacted "takeover"
laws. Except as described herein, the Purchaser has not attempted to comply with
any state takeover statutes in connection with the Offer. The Purchaser reserves
the right to challenge the validity or applicability of any state law  allegedly
applicable  to the Offer  and nothing in  this Offer to  Purchase nor any action
taken in connection herewith is intended as a waiver of that right. In the event
that any state takeover statute is found applicable to the Offer, the  Purchaser
might  be unable to accept  for payment or purchase  Shares tendered pursuant to
the Offer or be delayed in continuing  or consummating the Offer. In such  case,
the  Purchaser may  not be  obligated to  accept for  purchase, or  pay for, any
Shares tendered. See Section 14.

    ANTITRUST.  Under the HSR Act, and the rules and regulations that have  been
promulgated  thereunder  by the  Federal Trade  Commission (the  "FTC"), certain
acquisition transactions may  not be consummated  until certain information  and
documentary  material has been furnished for review by the Antitrust Division of
the Department of  Justice (the "Antitrust  Division") and the  FTC and  certain
waiting  period  requirements have  been  satisfied. The  acquisition  of Shares
pursuant to  the Offer  is, and  the Proposed  Merger may  be, subject  to  such
requirements.  Crane is  filing on  April 4,  1994 a  Premerger Notification and
Report Form  with the  Antitrust Division  and the  FTC in  connection with  the
purchase of Shares pursuant to the Offer and the Proposed Merger.

    Under the provisions of the HSR Act applicable to the Offer, the purchase of
Shares  pursuant to the Offer  may not be consummated  until the expiration of a
15-calendar day  waiting  period following  the  filing by  Crane,  unless  such
waiting  period is  earlier terminated  by the  FTC and  the Antitrust Division.
Accordingly, the waiting  period under the  HSR Act which  is applicable to  the
Offer  will expire at 11:59 P.M., New York  City time, on April 19, 1994, unless
Crane receives a request for additional information or documentary material. If,
within such 15-day waiting period, either the FTC or the Antitrust Division were
to request  additional  information  or documentary  material  from  Crane,  the
waiting  period would  expire at 11:59  P.M., New  York City time,  on the tenth
calendar day  after  the  date  of substantial  compliance  with  such  request.
Thereafter, the waiting period could be extended only by court order or with the
consent  of  Crane.  The  additional  10-calendar  day  waiting  period  may  be
terminated sooner by the FTC and the Antitrust Division. Although the Company is
required to file certain information and documentary material with the Antitrust
Division and the FTC in connection with the Offer, neither the Company's failure
to make such filings nor  a request from the Antitrust  Division or the FTC  for
additional  information or documentary material made  to the Company will extend
the waiting period with respect to the Offer.

    The Purchaser will not  accept for payment Shares  tendered pursuant to  the
Offer  unless and until the waiting period  required imposed by the HSR Act with
respect to the Offer have been satisfied. See Section 14.

    Pursuant to the HSR Act, Crane will request early termination of the waiting
period applicable to the  Offer. There can be  no assurance, however, that  such
waiting period will be terminated early.

                                       37
<PAGE>
    The  Antitrust Division and the FTC frequently scrutinize the legality under
the antitrust laws  of transactions  such as the  acquisition of  Shares by  the
Purchaser  pursuant to the Offer and the  Proposed Merger. At any time before or
after the Purchaser's  purchase of  Shares, the  Antitrust Division  or the  FTC
could  take such action  under the antitrust  laws as either  deems necessary or
desirable in the public  interest, including seeking to  enjoin the purchase  of
Shares  pursuant to the Offer, the divestiture of Shares purchased thereunder or
the divestiture of substantial assets of  the Company or Crane. Private  parties
as  well  as state  attorneys general  may  also bring  legal actions  under the
antitrust laws under certain circumstances. See Section 14.

    Based upon an examination of publicly available information relating to  the
businesses in which the Company is engaged, the Purchaser and Crane believe that
the  acquisition of Shares pursuant  to the Offer and  the Proposed Merger would
not violate the antitrust laws. The  Purchaser and Crane believe that  retention
of  all of the operations of the Company and Crane should be permitted under the
antitrust laws. Nevertheless, there can be no assurance that a challenge to  the
Offer  on antitrust grounds will not be made or, if such challenge is made, what
the result will be. See Section 14.

    16.   CERTAIN  FEES AND  EXPENSES.   Beacon  Hill  Partners, Inc.  has  been
retained by the Purchaser as Information Agent in connection with the Offer. The
Information  Agent  may contact  holders of  Shares  by mail,  telephone, telex,
telegraph and  personal interview  and may  request brokers,  dealers and  other
nominee  stockholders to  forward material relating  to the  Offer to beneficial
owners. Customary compensation will be paid for all such services in addition to
reimbursement of reasonable out-of-pocket expenses. The Purchaser has agreed  to
indemnify  the  Information  Agent  against  certain  liabilities  and expenses,
including liabilities under the federal securities laws.

    In addition, The Bank of New York  has been retained as the Depositary.  The
Depositary has not been retained to make solicitations or recommendations in its
role  as  Depositary.  The  Depositary  will  receive  reasonable  and customary
compensation for its services in connection  with the Offer, will be  reimbursed
for  its  reasonable  out-of-pocket  expenses and  will  be  indemnified against
certain liabilities and expenses in connection therewith.

    Except as  set  forth  above,  the  Purchaser  will  not  pay  any  fees  or
commissions  to any broker,  dealer or other person  (other than the Information
Agent) for soliciting tenders of Shares pursuant to the Offer. Brokers, dealers,
commercial banks and trust companies and  other nominees will, upon request,  be
reimbursed by the Purchaser for customary clerical and mailing expenses incurred
by them in forwarding materials to their customers.

    17.   MISCELLANEOUS.   The Offer is not  being made to  (nor will tenders be
accepted from or on behalf of) holders of Shares residing in any jurisdiction in
which the  making  of the  Offer  or the  acceptance  thereof would  not  be  in
compliance  with the  securities, blue sky  or other laws  of such jurisdiction.
However, the Purchaser may, in its discretion,  take such action as it may  deem
necessary  to make the Offer in any jurisdiction and extend the Offer to holders
of Shares in such jurisdiction. In  any jurisdiction where the securities,  blue
sky  or other laws require the Offer to  be made by a licensed broker or dealer,
the Offer will be deemed to  be made on behalf of  the Purchaser by one or  more
registered  brokers  or  dealers  that  are  licensed  under  the  laws  of such
jurisdiction.

    Crane and  the Purchaser  have  filed with  the  Commission a  Tender  Offer
Statement  on Schedule 14D-1, together with  exhibits, pursuant to Rule 14d-3 of
the General Rules  and Regulations  under the Exchange  Act, furnishing  certain
additional  information  with  respect to  the  Offer, and  may  file amendments
thereto. Such Schedule 14D-1 and any amendments thereto, including exhibits, may
be examined and copies may be obtained from the office of the Commission in  the
same manner as described in Section 8 with respect to information concerning the
Company,  except that they will not be  available at the regional offices of the
Commission.

    NO PERSON  HAS  BEEN AUTHORIZED  TO  GIVE ANY  INFORMATION  OR TO  MAKE  ANY
REPRESENTATION  ON BEHALF OF THE PURCHASER OR  CRANE NOT CONTAINED IN THIS OFFER
TO PURCHASE OR  IN THE LETTER  OF TRANSMITTAL AND,  IF GIVEN OR  MADE, ANY  SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED.
NEITHER

                                       38
<PAGE>
THE  DELIVERY OF THE OFFER  TO PURCHASE NOR ANY  PURCHASE PURSUANT TO THE OFFER,
SHALL, UNDER ANY CIRCUMSTANCES,  CREATE ANY IMPLICATION THAT  THERE HAS BEEN  NO
CHANGE  IN THE AFFAIRS OF CRANE, THE PURCHASER  OR THE COMPANY SINCE THE DATE AS
OF WHICH INFORMATION IS FURNISHED OR THE DATE OF THIS OFFER TO PURCHASE.

                                          CRANE ACQUISITION CORP.

March 30, 1994

                                       39
<PAGE>
                                                                      SCHEDULE I

            DIRECTORS AND EXECUTIVE OFFICERS OF CRANE AND PURCHASER

    The  following table  sets forth  the name,  business address  and principal
occupation or employment at the present time and during the last five years, and
the  name,  principal  business  and   address  of  any  corporation  or   other
organization  in which such employment is or was conducted, of each director and
executive officer of  Crane. Except as  otherwise noted, each  such person is  a
citizen of the United States and the business address of each such person is 100
First  Stamford  Place,  Stamford, CT  06902.  Except as  otherwise  noted, each
occupation set forth opposite  a person's name refers  to employment with  Crane
and  each such person has held such occupation for at least the past five years.
All directors and executive officers of the Purchaser are executive officers  of
Crane and are identified in the table below.

<TABLE>
<CAPTION>
                                                          PRESENT PRINCIPAL OCCUPATION OR EMPLOYMENT AND MATERIAL
                                                          OCCUPATIONS, OFFICES OR EMPLOYMENTS HELD DURING THE PAST
NAME AND BUSINESS ADDRESS                                                        FIVE YEARS
- --------------------------------------------------------  --------------------------------------------------------
<S>                                                       <C>
DIRECTORS:
Mone Anathan, III                                         President, Filene's Basement, Inc., Boston, MA,
40 Walnut Street                                          (Retailer).
Wellesley, MA 02181
E. Thayer Bigelow, Jr.                                    President and Chief Executive Officer, Time Warner Cable
300 First Stamford Place                                  Programming Inc., Stamford, CT., 1991 to present;
Stamford, CT 06902                                        President, Home Box Office, Inc. (cable programming and
                                                          entertainment), a subsidiary of Time Warner Inc., 1988
                                                          to 1991.
R.S. Evans                                                Chairman and Chief Executive Officer of Crane; President
100 First Stamford Place                                  1987 to 1991 and since 1992;Chairman and Chief Executive
Stamford, CT 06902                                        Officer of Medusa Corporation.
Richard S. Forte                                          President, Forte Cashmere Company, Inc., South Natick,
8A Pleasant Street                                        MA (importer and manufacturer).
South Natick, MA 01760
Dorsey R. Gardner                                         President, Kelso Management Co., Inc., Boston, MA
One Post Office Square                                    (investment management).
Boston, MA 02109
Dwight C. Minton                                          Chairman of the Board and Chief Executive Officer,
469 N. Harrison Street                                    Church & Dwight Co., Inc., Princeton, NJ (manufacturer
Princeton, NJ 08543                                       of consumer and specialty products).
Charles J. Queenan, Jr.                                   Partner, Kirpatrick & Lockhart, Pittsburgh, PA
1500 Oliver Building                                      (attorneys at law).
Pittsburgh, PA 15222
Arthur A. Seeligson, Jr.                                  Independent Oil Operator, Investments, San Antonio, TX.
4040 Broadway - Room 510
San Antonio, TX 78209
Boris Yavitz                                              Former  Paul  Garrett  Professor  of  Public  Policy and
Old Canoe Place Road                                      Business  Responsibility  and  Dean  Emeritus,  Columbia
Hampton Bays, NY 11946                                    University Graduate School of Business, New York, NY.
</TABLE>
<PAGE>
<TABLE>
<S>                                                       <C>
EXECUTIVE OFFICERS:
R. S. Evans                                               Chairman, Chief Executive Officer and President.
                                                          President of the Purchaser and Director.
L. Hill Clark                                             Executive Vice President, previously President, Lear
241 South Abbe Road                                       Romec Division of Crane, 1990 to 1994; Plant Manager,
Elyria, OH 44035                                          Allied Signal Aerospace, 1982-1989.
Robert J. Muller, Jr.                                     Executive Vice President, previously Vice President.
Paul R. Hundt                                             Vice President, Secretary and General Counsel. Vice
                                                          President and Secretary of Purchaser and Director.
Anthony D. Pantaleoni                                     Vice President--Environment, Health & Safety, previously
                                                          Director of Environmental, Health and Safety Audit
                                                          Programs of Hoechst Celanese; Director of Environmental,
                                                          Health and Safety Affairs of Specialty Chemicals Group.
Richard B. Phillips                                       Vice President--Human Resources.
Michael L. Raithel                                        Controller.
David S. Smith                                            Vice President--Finance and Chief Financial Officer;
                                                          previously Vice President--Corporate Development;
                                                          previously Vice President of Corporate Finance, Bankers
                                                          Trust Company. Vice President of Purchaser and Director.
Gil A. Dickoff                                            Treasurer, previously Assistant Treasurer. Treasurer of
                                                          Purchaser.
</TABLE>

                                       2
<PAGE>
    Facsimile  copies of the Letter of  Transmittal, properly completed and duly
executed, will be accepted.  The Letter of  Transmittal, Share Certificates  and
any  other required documents should be sent or delivered by each stockholder of
the Company or  his or  her broker, dealer,  commercial bank,  trust company  or
other nominee to the Depositary at one of its addresses set forth below:

                        THE DEPOSITARY FOR THE OFFER IS:

                              THE BANK OF NEW YORK

<TABLE>
<S>                        <C>                             <C>
        BY MAIL:           BY HAND OR OVERNIGHT COURIER:      BY FACSIMILE OR
                                                                  TELEX:
  The Bank of New York          The Bank of New York           Telex: 62763
   Tender and Exchange          Tender and Exchange         Fax: (212) 815-6213
       Department                    Department
     P.O. Box 11248              101 Barclay Street        FOR CONFIRMATION AND
  Church Street Station       Receive & Deliver Window      OTHER INFORMATION:
 New York, NY 10286-1248            Street Level              (212) 815-5829
                                 New York, NY 10286            Call Collect
</TABLE>

    Questions  and requests  for assistance may  be directed  to the Information
Agent at its  address and telephone  number listed below.  Additional copies  of
this  Offer  to  Purchase, the  Letter  of  Transmittal and  other  tender offer
materials may be  obtained from the  Information Agent as  set forth below,  and
will be furnished promptly at the Purchaser's expense. You may also contact your
broker,  dealer, commercial bank, trust company  or other nominee for assistance
concerning the Offer.

                    THE INFORMATION AGENT FOR THE OFFER IS:

                           Beacon Hill Partners, Inc.
                                90 Broad Street
                               New York, NY 10004
                            Toll Free (800) 755-5001

<PAGE>
                             LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION
           PURSUANT TO THE OFFER TO PURCHASE DATED MARCH 30, 1994 BY
                            CRANE ACQUISITION CORP.
                          A WHOLLY OWNED SUBSIDIARY OF
                                   CRANE CO.

  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
             TIME, ON APRIL 26, 1994, UNLESS THE OFFER IS EXTENDED.
                      THE DEPOSITARY FOR THE OFFER IS:
                             THE BANK OF NEW YORK

<TABLE>
<S>                        <C>                             <C>
        BY MAIL:           BY HAND OR OVERNIGHT COURIER:      BY FACSIMILE OR
                                                                  TELEX:
  The Bank of New York          The Bank of New York           Telex: 62763
   Tender and Exchange          Tender and Exchange         Fax: (212) 815-6213
       Department                    Department
     P.O. Box 11248              101 Barclay Street        FOR CONFIRMATION AND
  Church Street Station       Receive & Deliver Window      OTHER INFORMATION:
 New York, NY 10286-1248            Street Level              (212) 815-5829
                                 New York, NY 10286            Call Collect

</TABLE>

    DELIVERY OF THIS LETTER OF TRANSMITTAL TO AN ADDRESS OTHER THAN AS SET FORTH
ABOVE  OR TRANSMISSION OF INSTRUCTIONS VIA  A FACSIMILE TRANSMISSION TO A NUMBER
OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

    THE INSTRUCTIONS  ACCOMPANYING THIS  LETTER OF  TRANSMITTAL SHOULD  BE  READ
CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL IS COMPLETED.

    This  Letter of  Transmittal is  to be  completed by  stockholders either if
certificates for Shares (as  defined below) are to  be forwarded herewith or  if
tenders of Shares are to be made by book-entry transfer to an account maintained
by  The Bank of New York (the "Depositary") at The Depository Trust Company, the
Midwest Securities Trust  Company or the  Philadelphia Depository Trust  Company
(each  a  "Book-Entry Transfer  Facility" and  collectively  referred to  as the
"Book-Entry Transfer  Facilities")  pursuant  to the  procedures  set  forth  in
Section  3 of the Offer to Purchase  (as defined below). Stockholders who tender
Shares  by  book-entry   transfer  are   referred  to   herein  as   "Book-Entry
Stockholders."

    Holders   of  Shares  whose   certificates  for  such   Shares  (the  "Share
Certificates") are not immediately available  or who cannot deliver their  Share
Certificates  and all  other required documents  to the Depositary  prior to the
Expiration Date (as defined in Section 1 of the Offer to Purchase) or who cannot
complete the procedures for  book-entry transfer on a  timely basis must  tender
their  Shares  according  to the  guaranteed  delivery procedures  set  forth in
Section 3 of the Offer to Purchase. See Instruction 2. DELIVERY OF DOCUMENTS  TO
A BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE DELIVERY TO THE DEPOSITARY.
<PAGE>
/  /  CHECK HERE IF SHARES ARE BEING DELIVERED BY BOOK-ENTRY TRANSFER MADE TO AN
    ACCOUNT MAINTAINED BY THE DEPOSITARY WITH A BOOK-ENTRY TRANSFER FACILITY AND
    COMPLETE THE FOLLOWING:

<TABLE>
<S>  <C>
Name  of   Tendering   Institution: -----------------------------------
Check  Box  of  Book-Entry Transfer Facility:----------------------------------
 /  / The Depository Trust Company
 /  / Midwest  Securities   Trust Company
 /  / Philadelphia Depository Trust Company
Account Number:-----------------------------------
Transaction Code Number:-----------------------------------

</TABLE>

/ /  CHECK HERE IF SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE OF GUARANTEED
    DELIVERY PREVIOUSLY  SENT  TO THE  DEPOSITARY  AND COMPLETE  THE  FOLLOWING.
    PLEASE ENCLOSE A PHOTOCOPY OF SUCH NOTICE OF GUARANTEED DELIVERY.

<TABLE>
<S>  <C>
Name(s)  of  Registered  Holder(s):-----------------------------------
Window  Ticket  Number  (if   any):-----------------------------------
Date  of  Execution  of  Notice  of Guaranteed Delivery:---------------------------------
Name of Institution which Guaranteed Delivery:-----------------------------------
</TABLE>

<TABLE>
<S>                                           <C>                <C>                      <C>
                                      DESCRIPTION OF SHARES TENDERED
          NAME(S) AND ADDRESS(ES)
          OF REGISTERED HOLDER(S)
   (PLEASE FILL IN, IF BLANK, EXACTLY AS               SHARE CERTIFICATE(S) AND SHARE(S) TENDERED
 NAME(S) APPEAR(S) ON SHARE CERTIFICATE(S))              (ATTACH ADDITIONAL LIST, IF NECESSARY)
- -------------------------------------------  -----------------------------------------------------------
                                                                  TOTAL NUMBER OF SHARES
                                              SHARE CERTIFICATE   REPRESENTED BY SHARE    NUMBER OF SHARES
                                                 NUMBER(S)*          CERTIFICATE(S)*         TENDERED**
                                                Total Shares
                                             -------------------  ----------------------  ----------------
                                             -------------------  ----------------------  ----------------
                                             -------------------  ----------------------  ----------------

<FN>
  * Need not be completed by Book-Entry Stockholders.
 ** Unless otherwise indicated, it will be assumed that all Shares represented by certificates delivered
to the Depositary
     are being tendered. See Instruction 4.

</TABLE>

                   NOTE: SIGNATURE(S) MUST BE PROVIDED BELOW
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
<PAGE>
LADIES AND GENTLEMEN:

The  undersigned  hereby  tenders  to   Crane  Acquisition  Corp.,  a   Delaware
corporation  (the "Purchaser")  and a  wholly owned  subsidiary of  Crane Co., a
Delaware corporation ("Crane"), the above-described shares of Common Stock,  par
value  $.01  per share  (the "Common  Stock"), of  Mark Controls  Corporation, a
Delaware corporation (the "Company"), and the associated Series A Stock Purchase
Rights (the "Rights" and,  together with the Common  Stock, the "Shares"), at  a
purchase  price of $19.50 per Share, net  to the seller in cash without interest
thereon, upon the terms and subject to the conditions set forth in the Offer  to
Purchase,  dated March 30, 1994  (the "Offer to Purchase"),  receipt of which is
hereby  acknowledged,  and  in  this  Letter  of  Transmittal  (which   together
constitute the "Offer"). The undersigned understands that the Purchaser reserves
the  right to transfer or assign, in whole or  from time to time in part, to one
or more of its or Crane's affiliates,  the right to purchase all or any  portion
of the Shares tendered pursuant to the Offer.

    Subject  to, and effective upon, acceptance  for payment of, or payment for,
Shares tendered  herewith  in accordance  with  the  terms and  subject  to  the
conditions  of the Offer  (including, if the  Offer is extended  or amended, the
terms or conditions of any such extension or amendment), the undersigned  hereby
sells,  assigns and transfers to, or upon the order of, the Purchaser all right,
title and interest in and  to all of the Shares  that are being tendered  hereby
and  any  and all  dividends, distributions,  other  Shares, rights  (except the
Rights) or other securities  issued or issuable in  respect thereof on or  after
March  30, 1994 and payable or distributable  to the undersigned on a date prior
to the transfer to  the name of  the Purchaser or nominee  or transferee of  the
Purchaser  on  the  Company's  stock transfer  records  of  the  Shares tendered
herewith (a "Distribution"),  and constitutes  and appoints  the Depositary  the
true  and lawful agent  and attorney-in-fact of the  undersigned with respect to
such Shares (and any Distributions), with full power of substitution (such power
of attorney being deemed to be  an irrevocable power coupled with an  interest),
to (i) deliver Share Certificates (and any Distributions), or transfer ownership
of  such Shares  (and any  Distributions) on the  account books  maintained by a
Book-Entry Transfer Facility, together, in any such case, with all  accompanying
evidences  of transfer and authenticity to, or upon the order of, the Purchaser,
upon receipt by  the Depositary,  as the  undersigned's agent,  of the  purchase
price  (adjusted, if  appropriate, as provided  in the Offer  to Purchase), (ii)
present such Shares  (and any Distributions)  for transfer on  the books of  the
Company  and (iii)  receive all  benefits and  otherwise exercise  all rights of
beneficial ownership of such Shares  (and any Distributions), all in  accordance
with the terms and subject to the conditions of the Offer.

    All  authority  conferred  or  agreed  to be  conferred  in  this  Letter of
Transmittal  shall  be  binding  upon  successors,  assigns,  heirs,  executors,
administrators  and legal  representatives of the  undersigned and  shall not be
affected by, and  shall survive,  the death  or incapacity  of the  undersigned.
Except as stated in the Offer to Purchase, this tender is irrevocable.

    The  undersigned hereby irrevocably appoints  each designee of the Purchaser
the  attorney-in-fact  and  proxy  of  the  undersigned,  with  full  power   of
substitution, to the full extent of the undersigned's rights with respect to all
Shares  tendered hereby and accepted  for payment and paid  for by the Purchaser
(and any Distributions). All  such proxies shall be  considered coupled with  an
interest  in the  Shares tendered herewith.  Such appointment  will be effective
when, and  only to  the  extent that,  the Purchaser  pays  for such  Shares  by
depositing  the purchase price therefor with  the Depositary. Upon such payment,
all prior powers of attorney and  proxies given by the undersigned with  respect
to  such Shares  and such  other securities or  rights will  be revoked, without
further action, and no subsequent powers  of attorneys and proxies may be  given
(and,  if given, will not  be deemed effective). The  designees of the Purchaser
will, with respect  to the Shares  for which such  appointment is effective,  be
empowered  to exercise all voting and other rights of the undersigned as they in
their sole discretion may deem  proper at any annual  or special meeting of  the
Company's  stockholders, or any adjournment  or postponement thereof, by written
consent or otherwise. The Purchaser reserves the right to require that, in order
for Shares to be deemed validly  tendered, immediately upon the payment of  such
Shares,  the Purchaser  or its  designee must  be able  to exercise  full voting
rights with respect to such Shares and other securities, including voting at any
meeting of  stockholders or  acting  by written  consent  with respect  to  such
Shares.
<PAGE>
    The undersigned hereby represents and warrants that the undersigned has full
power  and authority  to tender, sell,  assign and transfer  the Shares tendered
hereby (and any Distributions) and that, when the same are accepted for  payment
and  paid for by the Purchaser, the  Purchaser will acquire good, marketable and
unencumbered title thereto, free and  clear of all liens, restrictions,  charges
and  encumbrances and  that the Shares  tendered hereby  (and any Distributions)
will not be subject  to any adverse claim.  The undersigned, upon request,  will
execute  and deliver  any additional documents  deemed by the  Depositary or the
Purchaser to be  necessary or  desirable to  complete the  sale, assignment  and
transfer  of Shares  tendered hereby (and  any Distributions).  In addition, the
undersigned shall promptly remit and transfer to the Depositary for the  account
of  the  Purchaser any  and all  other  Distributions in  respect of  the Shares
tendered hereby,  accompanied by  appropriate  documentation of  transfer,  and,
pending  such remittance or  appropriate assurance thereof,  the Purchaser shall
be, subject to applicable law, entitled to all rights and privileges as owner of
any such Distributions,  and may withhold  the entire purchase  price of  Shares
tendered  hereby, or deduct from such purchase price the amount or value thereof
as determined by the Purchaser in its sole discretion.

    Tender of Shares  made pursuant to  the Offer are  irrevocable, except  that
Shares  tendered pursuant to the Offer may be withdrawn at any time prior to the
Expiration Date (as defined  in the Offer to  Purchase) and, unless  theretofore
accepted  for  payment by  the  Purchaser pursuant  to  the Offer,  may  also be
withdrawn at  any time  after  May 28,  1994.  See Section  4  of the  Offer  to
Purchase.

    Unless  otherwise  indicated  herein under  "Special  Payment Instructions,"
please  issue  the  check  for  the  purchase  price  and/or  return  any  Share
Certificates  not tendered  or not  accepted for payment  in the  name(s) of the
registered  holder(s)  appearing   under  "Description   of  Shares   Tendered."
Similarly,  unless  otherwise indicated  under "Special  Delivery Instructions,"
please  mail  the  check  for  the  purchase  price  and/or  return  any   Share
Certificates  not  tendered  or  not  accepted  for  payment  (and  accompanying
documents, as  appropriate)  to  the address(es)  of  the  registered  holder(s)
appearing  under "Description  of Shares Tendered."  In the event  that both the
Special  Payment  Instructions  and   the  Special  Delivery  Instructions   are
completed, please issue the check for the purchase price and/or return any Share
Certificates  not  tendered or  not accepted  for  payment in  the name  of, and
deliver such  check  and/or  return  Share Certificates  to,  the  person(s)  so
indicated.  The  undersigned recognizes  that  the Purchaser  has  no obligation
pursuant to the  Special Payment Instructions  to transfer any  Shares from  the
name  of the  registered holder  thereof if  the Purchaser  does not  accept for
payment any of the Shares tendered hereby.
<PAGE>

<TABLE>
<S>                                                                   <C>
       SPECIAL PAYMENT INSTRUCTIONS                                            SPECIAL DELIVERY INSTRUCTIONS
     (See Instructions 1, 5, 6 and 7)                                         (See Instructions 1, 5, 6 and 7)
  To be completed ONLY if Share Certificates not ten-             To be completed ONLY if Share Certificates not ten-
dered or not accepted for payment and/or the check for the      dered or not accepted for payment and/or the check for the
purchase price of Shares accepted for payment are to be         purchase price of Shares accepted for payment are to be
issued in the name of someone other than the under-             sent to someone other than the undersigned or to the
signed.                                                         undersigned at an address other than that shown above.


Issue  / / check                                                Mail  / / check
      / / certificates to:                                            / / certificate(s) to:
Name:                                                           Name:
- ------------------------------------------                      ------------------------------------------
- ------------------------------------------                      ------------------------------------------
          (Please Type or Print)                                          (Please Type or Print)
Address:                                                        Address:
- ------------------------------------------                      ------------------------------------------
- ------------------------------------------                      ------------------------------------------
            (Include Zip Code)                                               (Include Zip Code)
- ------------------------------------------
    (Taxpayer Identification or Social
              Security No.)
(See Substitute Form W-9 on reverse side)
</TABLE>

<PAGE>
                                   IMPORTANT
       STOCKHOLDER: SIGN HERE AND COMPLETE SUBSTITUTE FORM W-9 ON REVERSE

- --------------------------------------------------------------------------------
                        (SIGNATURE(S) OF STOCKHOLDER(S))

                                     Dated:
- -------------------------------------------------------------------------, 19,


    (Must  be signed by the registered holder(s) exactly as name(s) appear(s) on
the Share  Certificates  or on  a  security  position listing  or  by  person(s)
authorized   to  become  registered  holder(s)  by  certificates  and  documents
transmitted herewith. If  signature is by  trustees, executors,  administrators,
guardians,  attorneys-in-fact, agents, officers of corporations or others acting
in  a  fiduciary  or  representative  capacity,  please  provide  the  following
information. See instruction 5.)

Name(s):
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                             (Please Type or Print)

Capacity (Full Title):
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                              (See Instruction 5)

Area Codes and Telephone Numbers:
- ------------------------------------------------------------------------------
                                      Home

- ------------------------------------------------------------------------------
                                    Business

Taxpayer Identification or Social Security No.:
- ----------------------------------------------------------------------
                                      (Complete Substitute Form W-9 on Reverse)

                           GUARANTEE OF SIGNATURE(S)
                           (SEE INSTRUCTIONS 1 AND 5)

Authorized Signature:
- --------------------------------------------------------------------------------

Name:
- --------------------------------------------------------------------------------
                             (Please Type or Print)

Title:
- --------------------------------------------------------------------------------

Name of Firm:
- --------------------------------------------------------------------------------

Address:
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                               (Include Zip Code)

(Area Code and Tel. No.)
- --------------------------------------------------------------------------------

Dated:
- --------------------------------------------------------------------------------
<PAGE>
                                  INSTRUCTIONS
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER

     1.    GUARANTEE  OF  SIGNATURES.    Except  as  otherwise  provided  below,
signatures on this Letter of Transmittal must be guaranteed by a firm that is  a
bank, broker, dealer, credit union, savings association or other entity which is
a  member in good standing of  the Securities Transfer Agent's Medallion Program
(an "Eligible Institution"), unless the Shares tendered hereby are tendered  (i)
by  the  registered holder  of such  Shares  who has  completed neither  the box
entitled "Special Payment Instructions" nor  the box entitled "Special  Delivery
Instructions"  herein or  (ii) for the  account of an  Eligible Institution. See
Instruction 5. If the Share Certificates are registered in the name of a  person
other than the signer of this Letter of Transmittal, or if payment is to be made
to,  or Share Certificates for  unpurchased Shares are to  be issued or returned
to, a person other  than the registered holder,  then the tendered  certificates
must  be endorsed or accompanied  by duly executed stock  powers, in either case
signed exactly as the name or names  of the registered holder or holders  appear
on  the certificates,  with the signatures  on the certificates  or stock powers
guaranteed by an Eligible Institution as provided herein. See Instruction 5.

     2.  REQUIREMENTS  OF TENDER.   This  Letter of  Transmittal is  to be  used
either  if Share Certificates are to be  forwarded herewith or if tenders are to
be made pursuant to the procedures  for tender by book-entry transfer set  forth
in   Section  3  of  the  Offer  to  Purchase.  Share  Certificates,  or  timely
confirmation (a  "Book-Entry Confirmation")  of a  book-entry transfer  of  such
Shares  into the Depositary's account at a Book-Entry Transfer Facility, as well
as this Letter of  Transmittal (or a facsimile  hereof), properly completed  and
duly executed, with any required signature guarantees, or an Agent's Message (as
defined  in Section 2 of the Offer  to Purchase) in connection with a book-entry
transfer and any other documents required by this Letter of Transmittal, must be
received by the Depositary at one of its addresses set forth herein prior to the
Expiration Date.  Stockholders  whose  Share Certificates  are  not  immediately
available  or who cannot deliver their Share Certificates and all other required
documents to the Depositary prior to the Expiration Date or who cannot  complete
the  procedures for delivery by book-entry transfer on a timely basis may tender
their Shares by properly  completing and duly executing  a Notice of  Guaranteed
Delivery  pursuant to the guaranteed delivery  procedures set forth in Section 3
of the Offer to Purchase.  Pursuant to such procedure:  (i) such tender must  be
made  by or through an Eligible Institution,  (ii) a properly completed and duly
executed Notice of Guaranteed Delivery, substantially in the form made available
by the Purchaser,  must be received  by the Depositary  prior to the  Expiration
Date,   and  (iii)  the  Share   Certificates  (or  a  Book-Entry  Confirmation)
representing all tendered Shares, in proper  form for transfer, together with  a
Letter  of Transmittal  (or a  facsimile thereof),  properly completed  and duly
executed, with  any  required  signature  guarantees  (or,  in  the  case  of  a
book-entry  transfer, an  Agent's Message) and  any other  documents required by
this Letter  of Transmittal,  must be  received by  the Depositary  within  five
National  Association of  Securities Dealers Automated  Quotation System trading
days after the date of execution of  such Notice of Guaranteed Delivery, all  as
provided  in  Section 3  of the  Offer  to Purchase.  If Share  Certificates are
forwarded separately to the Depositary,  a properly completed and duly  executed
Letter  of  Transmittal  (or  a  facsimile  thereof)  must  accompany  each such
delivery.

    The method of delivery of Share Certificates, this Letter of Transmittal and
all other required documents, including delivery through any Book-Entry Transfer
Facility, is at the option  and sole risk of  the tendering stockholder and  the
delivery  will be deemed made only when  actually received by the Depositary. If
delivery is by  mail, registered  mail with return  receipt requested,  properly
insured,  is recommended.  In all  cases, sufficient  time should  be allowed to
ensure timely delivery.

    No alternative, conditional or  contingent tenders will  be accepted and  no
fractional Shares will be purchased. All tendering stockholders, by execution of
this  Letter of Transmittal (or a facsimile thereof), waive any right to receive
any notice of the acceptance of their Shares for payment.

     3.  INADEQUATE SPACE.  If  the space provided herein under "Description  of
Shares  Tendered" is  inadequate, the certificate  numbers and/or  the number of
Shares should be listed on a separate signed schedule attached hereto.
<PAGE>
     4.  PARTIAL TENDERS (NOT APPLICABLE TO BOOK-ENTRY STOCKHOLDERS).  If  fewer
than  all  the Shares  represented by  any Share  Certificates delivered  to the
Depositary herewith are  to be  tendered hereby, fill  in the  number of  Shares
which  are to be  tendered in the  box entitled "Number  of Shares Tendered." In
such case,  a new  Share Certificate  for the  untendered Shares  will be  sent,
without  expense, to  the person(s) signing  this Letter  of Transmittal, unless
otherwise provided in the box  entitled "Special Delivery Instructions" on  this
Letter  of Transmittal,  as soon as  practicable after the  Expiration Date. All
Shares represented by certificate(s) delivered to the Depositary will be  deemed
to have been tendered unless otherwise indicated.

     5.  SIGNATURES ON LETTER OF TRANSMITTAL, STOCK POWERS AND ENDORSEMENTS.  If
this  Letter of Transmittal is signed by  the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond with the name(s) as written on
the face of  the certificate(s)  without alteration, enlargement  or any  change
whatsoever.

    If  any of  the Shares tendered  hereby are owned  of record by  two or more
joint owners, all such owners must sign this Letter of Transmittal.

    If any of the tendered Shares  are registered in different names on  several
certificates, it will be necessary to complete, sign and submit as many separate
Letters of Transmittal as there are different registrations of certificates.

    If this Letter of Transmittal or any certificates or stock powers are signed
by  a trustee, executor, administrator, guardian, attorney-in-fact, officer of a
corporation or other person  acting in a  fiduciary or representative  capacity,
such person should so indicate when signing, and proper evidence satisfactory to
the Purchaser of such person's authority so to act must be submitted.

    If  this Letter of Transmittal is signed  by the registered holder(s) of the
Shares listed  and  transmitted  hereby,  no  endorsements  of  certificates  or
separate  stock  powers are  required unless  payment  is to  be made,  or Share
Certificates not tendered or not  purchased are to be  issued or returned, to  a
person  other than the registered holder(s).  Signatures on such certificates or
stock powers must be guaranteed by an Eligible Institution.

    If this  Letter  of  Transmittal  is  signed by  a  person  other  than  the
registered  holder(s) of the  Shares evidenced by  the certificate(s) listed and
transmitted hereby,  the  certificate(s)  must be  endorsed  or  accompanied  by
appropriate  stock powers, in either  case signed exactly as  the name(s) of the
registered  holder(s)  appear   on  the  certificate(s).   Signatures  on   such
certificate(s) or stock powers must be guaranteed by an Eligible Institution.

     6.   STOCK TRANSFER TAXES.  Except as  set forth in this Instruction 6, the
Purchaser will pay or cause to be paid any stock transfer taxes with respect  to
the  transfer and sale  of purchased Shares to  it or its  order pursuant to the
Offer. If, however, payment of the purchase price  is to be made to, or (in  the
circumstances  permitted  hereby)  if  Share Certificates  not  tendered  or not
purchased are  to be  registered  in the  name of,  any  person other  than  the
registered  holder(s), or if  tendered Share Certificates  are registered in the
name of any person other than the person(s) signing this Letter of  Transmittal,
the  amount  of any  stock  transfer taxes  (whether  imposed on  the registered
holder(s) or  such other  person) payable  on account  of the  transfer to  such
person  will be deducted from the purchase price unless satisfactory evidence of
the payment of such taxes or exemption therefrom is submitted.

    Except as  provided in  this Instruction  6, it  will not  be necessary  for
transfer tax stamps to be affixed to the certificate(s) listed in this Letter of
Transmittal.

     7.   SPECIAL PAYMENT  AND DELIVERY INSTRUCTIONS.   If a  check and/or Share
Certificates for unpurchased Shares  are to be  issued in the  name of a  person
other  than the signer of this Letter of Transmittal or if a check is to be sent
and/or such Share  Certificates are  to be returned  to someone  other than  the
signer  of this  Letter of Transmittal  or to  an address other  than that shown
above, the appropriate boxes on this Letter of Transmittal should be completed.

     8.  REQUESTS FOR ASSISTANCE OR  ADDITIONAL COPIES.  Questions and  requests
for  assistance  may be  directed to  the  Information Agent  at its  address or
telephone number set forth below and additional
<PAGE>
copies of the Offer to  Purchase, this Letter of  Transmittal and the Notice  of
Guaranteed  Delivery  may  be  obtained  at  the  Purchaser's  expense  from the
Information Agent  at its  address set  forth below  or from  a broker,  dealer,
commercial bank or trust company.

     9.  WAIVER OF CONDITIONS.  The conditions of the Offer may be waived by the
Purchaser,  in  whole or  in part,  at  any time  or from  time  to time  in the
Purchaser's sole discretion.

    10.  BACKUP  WITHHOLDING TAX.   Each  tendering stockholder  is required  to
provide  the Depositary with a correct Taxpayer Identification Number ("TIN") on
Substitute Form W-9, which is provided under "Important Tax Information"  below.
Failure  to provide the information  on the Substitute Form  W-9 may subject the
tendering stockholder  to  31% federal  income  tax backup  withholding  on  the
payment  of the purchase price. The box in Part  3 of the form may be checked if
the tendering stockholder has not been issued a TIN and has applied for a number
or intends to apply for  a number in the  near future. If the  box in Part 3  is
checked  and  the Depositary  is not  provided with  a TIN  within 60  days, the
Depositary will withhold 31% of all payments of the purchase price, if any, made
thereafter pursuant to the Offer until a TIN is provided to the Depositary.

    IMPORTANT: THIS  LETTER OF  TRANSMITTAL (OR  A FACSIMILE  HEREOF),  PROPERLY
COMPLETED  AND DULY  EXECUTED, TOGETHER  WITH ANY  REQUIRED SIGNATURE GUARANTEES
(OR, IN THE CASE OF A BOOK-ENTRY TRANSFER, AN AGENT'S MESSAGE) AND  CERTIFICATES
OR BOOK-ENTRY CONFIRMATION AND ALL OTHER REQUIRED DOCUMENTS, MUST BE RECEIVED BY
THE  DEPOSITARY, OR A PROPERLY COMPLETED  AND DULY EXECUTED NOTICE OF GUARANTEED
DELIVERY MUST BE RECEIVED BY THE DEPOSITARY, PRIOR TO THE EXPIRATION DATE.

                           IMPORTANT TAX INFORMATION

    Under federal  income  tax law,  a  stockholder whose  tendered  Shares  are
accepted  for payment is required to provide the Depositary (as payer) with such
stockholder's correct TIN on Substitute Form  W-9 below. If such stockholder  is
an  individual, the TIN is his or her social security number. The Certificate of
Awaiting Taxpayer Identification  Number should  be completed  if the  tendering
stockholder has not been issued a TIN and has applied for a number or intends to
apply  for a number in the near future.  Failure to furnish timely a correct TIN
or include all required information will  subject the taxpayer to a $50  penalty
for  each  failure. There  are  civil and  criminal  penalties for  giving false
information to  avoid  backup  withholding. A  stockholder  who  provides  false
information  may be  subject to  a civil penalty  of up  to $500  and a criminal
penalty, upon conviction, of a  fine up to $1,000 or  imprisonment of up to  one
year, or both.

    Certain  stockholders (including, among others, all corporations and certain
foreign individuals) are not subject  to these backup withholding and  reporting
requirements.  For a foreign individual to  qualify as an exempt recipient, that
stockholder  must  submit  a  statement,  signed  under  penalties  of  perjury,
attesting  to that individual's exempt status.  Forms for such statements can be
obtained from the Depositary. See  the enclosed Guidelines for Certification  of
Taxpayer   Identification  Number   on  Substitute   Form  W-9   for  additional
instructions.

    If (i) the stockholder  does not furnish  the Depositary with  a TIN in  the
required  manner;  (ii) the  IRS  notifies the  Depositary  the TIN  provided is
incorrect; or (iii) the stockholder is required, but fails, to certify it is not
subject  to  backup  withholding,  backup  withholding  will  apply.  If  backup
withholding  applies, the Depositary is required to withhold 31% of any payments
made to the stockholder.  Backup withholding is not  an additional tax.  Rather,
the  tax liability of persons  subject to backup withholding  will be reduced by
the amount of tax withheld. If withholding results in an overpayment of taxes, a
refund may be obtained from the Internal Revenue Service.

PURPOSE OF SUBSTITUTE FORM W-9

    To prevent backup federal income tax withholding with respect to payment  of
the  purchase price  for Shares purchased  pursuant to the  Offer, a stockholder
must provide  the Depositary  with his  or  her correct  TIN by  completing  the
Substitute  Form W-9 below  certifying that the TIN  provided on Substitute From
W-9 is correct (or that  such stockholder is awaiting a  TIN) and that (1)  such
stockholder has not been notified by the Internal Revenue Service that he or she
is  subject to backup withholding as a  result of failure to report all interest
or dividends or (2)  the Internal Revenue Service  has notified the  stockholder
that he or she is no longer subject to backup withholding.
<PAGE>
WHAT NUMBER TO GIVE THE DEPOSITARY

    The  stockholder  is required  to give  the  Depositary the  social security
number or employer  identification number  of the  record holder  of the  Shares
tendered  hereby. If the Shares are in more than one name or are not in the name
of the  actual  owner, consult  the  enclosed Guidelines  for  Certification  of
Taxpayer Identification Number on Substitute Form W-9 for additional guidance on
which number to report.
<PAGE>

<TABLE>
<S>                       <C>                                 <C>          <C>
                              PAYER'S NAME: THE BANK OF NEW YORK
                                                                   Social Security Number
                          Part 1 -- PLEASE PROVIDE YOUR TIN
                           IN THE BOX AT RIGHT AND CERTIFY
                           BY SIGNING AND DATING BELOW
                                                                             OR
 SUBSTITUTE                                                    Employer Identification Number
 FORM W-9                 Part 2 -- Certificates--Under penalities of perjury, I certify that:
 Department of the
 Treasury
 Internal Revenue
 Service
                          (1)   The  number  shown   on  this  form   is  my  correct  Taxpayer
                          Identification Number (or I am waiting  for a number to be issued  to
                              me); and
                          (2)  I am not subject  to backup withholding because  (i) I am exempt
                          from backup  withholding,  (ii)  I  have not  been  notified  by  the
                              Internal  Revenue Service (the "IRS") that I am subject to backup
                              withholding as a result  of a failure to  report all interest  or
                              dividends,  or (iii) the IRS has notified  me that I am no longer
                              subject to backup withholding.
 PAYER'S REQUEST FOR       CERTIFICATION INSTRUCTIONS --You must cross  out item (2) in part  2
 TAXPAYER IDENTIFICATION   above  if you have been notified by  the IRS that you are subject to
 NUMBER (TIN)              backup withholding because of under-reporting interest or  dividends
                           on your tax return. However, if after being notified by the IRS that
                           you   were  subject  to  backup  withholding  you  received  another
                           notification from the IRS stating that you are no longer subject  to
                           backup withholding, do not cross out item (2).

                           SIGNATURE ---------------------------- DATE----------   Part 3
                          NAME (Please Print) ----------------------------------   Awaiting TIN / /
               NOTE:      FAILURE  TO  COMPLETE  AND  RETURN THIS  FORM  MAY  RESULT  IN BACKUP
                          WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER.
                          PLEASE REVIEW THE ENCLOSED  GUIDELINES FOR CERTIFICATION OF  TAXPAYER
                          IDENTIFICATION  NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
                                       YOU MUST COMPLETE THE FOLLOWING CERTIFICATE
                                 IF YOU CHECKED THE BOX IN PART 3 OF SUBSTITUTE FORM W-9
                    CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
   I certify under  penalties of perjury  that a  taxpayer identification number  has not  been
 issued  to me, and either (i) I have mailed  or delivered an application to receive a taxpayer
 identification number to the  appropriate Internal Revenue Service  Center or Social  Security
 Administration Office or (ii) I intend to mail or deliver an application in the near future. I
 understand  that if I do not  provide a taxpayer identification number  within 60 days, 31% of
 all reportable payments  made to  me thereafter  will be withheld  until I  provide a  number.
                            ------------------------------------   --------------------------
                          Signature                           Date
                          ------------------------------------
                          Name (Please Print)
</TABLE>

<PAGE>
                    (DO NOT WRITE IN BOX IMMEDIATELY BELOW)

Date Received: --------- Accepted By: ------------ Checked By: ----------------

<TABLE>
<S>              <C>              <C>              <C>              <C>              <C>              <C>
    SHARES           SHARES           SHARES            CHECK           AMOUNT           SHARES
  SURRENDERED       TENDERED         ACCEPTED            NO.           OF CHECK         RETURNED      CERTIFICATE NO.
</TABLE>

Delivery Prepared By: ---------- Checked By: -------------- Date:  -------------

                    THE INFORMATION AGENT FOR THE OFFER IS:

                           Beacon Hill Partners, Inc.
                                90 Broad Street
                               New York, NY 10004
                           Toll Free: (800) 755-5001

<PAGE>
                         NOTICE OF GUARANTEED DELIVERY

                                      FOR
                        TENDER OF SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION

    This  Notice of Guaranteed  Delivery or one  substantially equivalent hereto
must be used to accept the Offer (as defined below) if certificates representing
shares of Common Stock, par  value $.01 per share  (the "Common Stock") of  Mark
Controls Corporation, a Delaware corporation (the "Company"), and the associated
Series A Stock Purchase Rights (the "Rights and, together with the Common Stock,
the "Shares") are not immediately available or time will not permit all required
documents  to reach The Bank  of New York (the "Depositary")  on or prior to the
Expiration Date (as defined in  Section 1 of the  Offer to Purchase (as  defined
below)),  or  the  procedure  for  delivery  by  book-entry  transfer  cannot be
completed on a timely basis. This Notice of Guaranteed Delivery may be delivered
by hand or sent by facsimile transmission or mail to the Depositary. See Section
3 of the Offer to Purchase.

                        THE DEPOSITARY FOR THE OFFER IS:

                              THE BANK OF NEW YORK

<TABLE>
<S>                        <C>                             <C>
        BY MAIL:           BY HAND OR OVERNIGHT COURIER:      BY FACSIMILE OR
  The Bank of New York          The Bank of New York              TELEX:
   Tender and Exchange          Tender and Exchange            Telex: 62763
       Department                    Department             Fax: (212) 815-6213
     P.O. Box 11248              101 Barclay Street
  Church Street Station      Receive & Deliver Window--    FOR CONFIRMATION AND
 New York, NY 10286-1248            Street Level            OTHER INFORMATION:
                                 New York, NY 10286           (212) 815-5829
                                                               Call Collect
</TABLE>

 DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS SET
 FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO A
   NUMBER OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY.

    This  Notice  of  Guaranteed  Delivery  is  not  to  be  used  to  guarantee
signatures.  If  a  signature on  a  Letter  of Transmittal  is  required  to be
guaranteed by  an  Eligible Institution  under  the instructions  thereto,  such
signature  guarantee  must  appear  in  the  applicable  space  provided  in the
signature box on the Letter of Transmittal.

Ladies and Gentlemen:

    The undersigned  hereby  tenders  to Crane  Acquisition  Corp.,  a  Delaware
corporation  (the "Purchaser")  and a  wholly owned  subsidiary of  Crane Co., a
Delaware corporation, upon the terms and subject to the conditions set forth  in
the  Offer to Purchase, dated  March 30, 1994 (the  "Offer to Purchase"), and in
the related  Letter  of Transmittal  (which  together constitute  the  "Offer"),
receipt  of each of which is hereby acknowledged, the number of Shares indicated
below pursuant to the guaranteed delivery  procedures set forth in Section 3  of
the Offer to Purchase.

<TABLE>
<S>                                               <C>

Number of Shares:                                 Name(s) of Record Holder(s):
- -----------------------------------------------   -----------------------------------------------

Account Number:                                   ------------------------------------------------
- -----------------------------------------------
Certificate No(s).                                Address(es):
                                                  -----------------------------------------------

(if available):                                   ------------------------------------------------
- -----------------------------------------------
- ------------------------------------------------  ------------------------------------------------
- ------------------------------------------------  Area Code and
If Share(s) will be tendered by book-entry        Telephone Number(s):
transfer, check one box
                                                  -----------------------------------------------
/ / The Depository Trust Company                  Signature(s):
                                                  -----------------------------------------------
/ / Midwest Securities Trust Company              ------------------------------------------------
/ / Philadelphia Depository Trust Company         ------------------------------------------------

Account Number:                                   ------------------------------------------------
- -----------------------------------------------

Date:                                             ------------------------------------------------
- -----------------------------------------------
</TABLE>

              THE GUARANTEE ON THE REVERSE SIDE MUST BE COMPLETED
<PAGE>
                                   GUARANTEE

                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)

    The  undersigned,  a firm  that  is a  bank,  broker, dealer,  credit union,
savings association or other entity  which is a member  in good standing of  the
Securities  Transfer Agent's Medallion Program,  hereby guarantees to deliver to
the Depositary,  at one  of  its addresses  set  forth above,  the  certificates
representing  all tendered Shares, in proper  form for transfer, or a Book-Entry
Confirmation (as defined  in the Offer  to Purchase), together  with a  properly
completed and duly executed Letter of Transmittal (or a facsimile thereof), with
any  required signature guarantees (or, in the case of a book-entry transfer, an
Agent's Message (as defined in the Offer to Purchase)), and any other  documents
required  by  the  Letter of  Transmittal  within five  National  Association of
Securities Dealers Automated  Quotation System  trading days after  the date  of
execution of this Notice of Guaranteed Delivery.

<TABLE>
<S>                                           <C>

Name of Firm:                                 -------------------------------------------
- ------------------------------------------
                                              (Authorized Signature)

Address:                                      Title:
                                              ------------------------------------------
- ------------------------------------------
                                              Name:
- -------------------------------------------   -------------------------------------------
                (Zip Code)                    (Please type or print)

Area Code and Telephone Number                Date:
                                              ------------------------------------------
- -------------------------------------------
</TABLE>

NOTE: DO NOT SEND CERTIFICATES FOR SHARES WITH THIS NOTICE OF GUARANTEED
      DELIVERY. CERTIFICATES FOR SHARES SHOULD BE SENT WITH YOUR LETTER OF
      TRANSMITTAL.

                                       2

<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                            CRANE ACQUISITION CORP.
                          A WHOLLY OWNED SUBSIDIARY OF
                                   CRANE CO.

    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
          CITY TIME, ON APRIL 26, 1994, UNLESS THE OFFER IS EXTENDED.
                                                                  March 30, 1994
To Brokers, Dealers, Commercial Banks,
 Trust Companies and Other Nominees:

    We  have been appointed  by Crane Acquisition  Corp., a Delaware corporation
(the "Purchaser")  and  a wholly  owned  subsidiary  of Crane  Co.,  a  Delaware
corporation  ("Crane"),  to  act as  Information  Agent in  connection  with the
Purchaser's offer to  purchase for  cash all  the outstanding  shares of  Common
Stock,  par  value  $.01  per  share  (the  "Common  Stock"),  of  Mark Controls
Corporation, a Delaware corporation (the "Company"), and the associated Series A
Stock Purchase Rights  (the "Rights" and,  together with the  Common Stock,  the
"Shares"),  at a price  of $19.50 per Share,  net to the  seller in cash without
interest thereon, upon the terms and subject to the conditions set forth in  the
Offer  to Purchase, dated March  30, 1994 (the "Offer  to Purchase"), and in the
related Letter of Transmittal (which  together constitute the "Offer")  enclosed
herewith.  Holders  of Shares  whose certificates  for  such Shares  (the "Share
Certificates") are not immediately available  or who cannot deliver their  Share
Certificates  and all  other required  documents to  the Depositary  (as defined
below) prior to the Expiration  Date (as defined in  the Offer to Purchase),  or
who  cannot complete the  procedures for book-entry transfer  on a timely basis,
must tender their  Shares according  to the guaranteed  delivery procedures  set
forth in Section 3 of the Offer to Purchase.

    Please furnish copies of the enclosed materials to those of your clients for
whose  accounts you hold Shares  registered in your name or  in the name of your
nominee.

    The Offer  is conditioned  upon,  among other  things, there  being  validly
tendered  and not withdrawn prior  to the Expiration Date  that number of Shares
which, together with  the Shares  beneficially owned  by the  Purchaser and  its
affiliates,  represents at least a majority of the Shares outstanding on a fully
diluted basis on the date of purchase. Crane now owns approximately 13.2% of the
outstanding Shares of the Company. The Offer is also subject to other terms  and
conditions  contained in the  Offer to Purchase.  See Sections 14  and 15 of the
Offer to Purchase.

    Enclosed herewith for your  information and forwarding  to your clients  are
copies of the following documents:

    1.  The Offer to Purchase, dated March 30, 1994.
<PAGE>
    2.  The gray Letter of Transmittal to tender Shares for your use and for the
information  of your clients. Facsimile copies  of the Letter of Transmittal may
be used to tender Shares.

    3.  The blue Notice of Guaranteed  Delivery for Shares to be used to  accept
the  Offer  if  Share Certificates  are  not  immediately available  or  if such
certificates and all other required documents cannot be delivered to The Bank of
New York  (the "Depositary")  by the  Expiration Date  or if  the procedure  for
book-entry transfer cannot be completed by the Expiration Date.

    4.   A yellow printed form  of letter which may be  sent to your clients for
whose accounts you hold Shares  registered in your name or  in the name of  your
nominee,  with  space provided  for  obtaining such  clients'  instructions with
regard to the Offer.

    5.  Guidelines of the Internal Revenue Service for Certification of Taxpayer
Identification Number on Substitute Form W-9.

    6.  A pink Tyco Tender Offer Notice of Withdrawal.

    7.  A green Danaher Tender Offer Notice of Withdrawal.

    8.  A return envelope addressed to The Bank of New York, the Depositary.

    YOUR PROMPT ACTION  IS REQUESTED.  WE URGE YOU  TO CONTACT  YOUR CLIENTS  AS
PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT
12:00  MIDNIGHT,  NEW YORK  CITY TIME,  ON APRIL  26, 1994  UNLESS THE  OFFER IS
EXTENDED.

    In order to take advantage  of the Offer, (i)  a duly executed and  properly
completed  Letter of Transmittal  and any required  signature guarantees (or, in
the case of a book-entry transfer, an  Agent's Message (as defined in the  Offer
to  Purchase)) or other required documents should be sent to the Depositary, and
(ii) either  Share  Certificates  representing the  tendered  Shares  should  be
delivered  to the  Depositary, or such  Shares should be  tendered by book-entry
transfer into  the Depositary's  account maintained  at one  of the  Book  Entry
Transfer  Facilities (as described in the  Offer to Purchase), all in accordance
with the instructions set forth  in the Letter of  Transmittal and the Offer  to
Purchase.

    If  holders of Shares  wish to tender,  but it is  impracticable for them to
forward their Share Certificates or other required documents on or prior to  the
Expiration Date or to comply with the book-entry transfer procedures on a timely
basis,  a tender may be effected by following the guaranteed delivery procedures
specified in Section 3 of the Offer to Purchase.

    The Purchaser will not pay any commissions or fees to any broker, dealer  or
other  person (other than the Depositary and the Information Agent, as described
in the  Offer to  Purchase) for  soliciting tenders  of Shares  pursuant to  the
Offer.  The Purchaser will,  however, upon request,  reimburse you for customary
clerical and mailing expenses incurred by you in forwarding any of the  enclosed
materials  to your clients. The Purchaser will pay or cause to be paid any stock
transfer taxes payable  on the  transfer of Shares  to it,  except as  otherwise
provided in Instruction 6 of the Letter of Transmittal.

    Any inquiries you may have with respect to the Offer should be addressed to,
and  additional  copies  of the  enclosed  material  may be  obtained  from, the
Information Agent at  its address  and telephone number  set forth  on the  back
cover of the Offer to Purchase.

                                          Very truly yours,

                                          Beacon Hill Partners, Inc.

    NOTHING  CONTAINED HEREIN OR IN THE  ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY  OTHER  PERSON  THE AGENT  OF  THE  PURCHASER, CRANE,  THE  COMPANY,  THE
DEPOSITARY  OR  THE INFORMATION  AGENT,  OR ANY  AFFILIATE  OF ANY  OF  THEM, OR
AUTHORIZE YOU OR ANY OTHER PERSON TO  MAKE ANY STATEMENT OR USE ANY DOCUMENT  ON
BEHALF  OF ANY  OF THEM  IN CONNECTION  WITH THE  OFFER OTHER  THAN THE ENCLOSED
DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.

<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                            CRANE ACQUISITION CORP.
                          A WHOLLY OWNED SUBSIDIARY OF
                                   CRANE CO.

<TABLE>
<S>      <C>                                            <C>
          THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE
                  AT 12:00 MIDNIGHT, NEW YORK
           CITY TIME, ON APRIL 26, 1994, UNLESS THE
                      OFFER IS EXTENDED.
</TABLE>

To Our Clients:

    Enclosed  for your consideration are the  Offer to Purchase, dated March 30,
1994 (the "Offer  to Purchase"), and  the related Letter  of Transmittal  (which
together  constitute the  "Offer") relating  to the  offer by  Crane Acquisition
Corp., a Delaware corporation (the  "Purchaser") and wholly owned subsidiary  of
Crane  Co., a Delaware corporation ("Crane"), to purchase all outstanding shares
of Common Stock, par value $.01 per share (the "Common Stock"), of Mark Controls
Corporation, a Delaware corporation (the "Company"), and the associated Series A
Stock Purchase Rights  (the "Rights" and,  together with the  Common Stock,  the
"Shares"),  at a price  of $19.50 per Share,  net to the  seller in cash without
interest thereon, upon the terms and subject to the conditions set forth in  the
Offer.  Holders  of  Shares  whose  certificates  for  such  Shares  (the "Share
Certificates") are not immediately available  or who cannot deliver their  Share
Certificates  and all  other required  documents to  the Depositary  (as defined
below) prior to the Expiration  Date (as defined in  the Offer to Purchase),  or
who  cannot complete the  procedures for book-entry transfer  on a timely basis,
must tender their  Shares according  to the guaranteed  delivery procedures  set
forth in Section 3 of the Offer to Purchase.

    We  are the holder of record of Shares held by us for your account. A tender
of such Shares can be made  only by us as the  holder of record and pursuant  to
your  instructions.  The Letter  of  Transmittal is  furnished  to you  for your
information only and cannot be used by you to tender Shares held by us for  your
account.

    Accordingly,  we  request instructions  as to  whether you  wish to  have us
tender on your behalf any or all Shares held by us for your account pursuant  to
the terms and conditions set forth in the Offer.

    Please note the following:

    1.  The tender price is $19.50 per Share net to you in cash without interest
thereon, upon the terms and subject to the conditions set forth in the Offer.
<PAGE>
    2.  The Offer is being made for all outstanding Shares.

    3.   The Offer is conditioned upon,  among other things, there being validly
tendered and not withdrawn prior to the Expiration Date (as defined in the Offer
to Purchase) that number of Shares which, together with the Shares  beneficially
owned by the Purchaser and its affiliates, represents at least a majority of the
Shares  outstanding on a fully diluted basis  on the date of purchase. Crane now
owns approximately 13.2% of the currently outstanding Shares of the Company. The
Offer is also subject to  other terms and conditions  contained in the Offer  to
Purchase. See Sections 14 and 15 of the Offer to Purchase.

    4.   Tendering stockholders will  not be obligated to  pay brokerage fees or
commissions or, except as otherwise provided  in Instruction 6 of the Letter  of
Transmittal,  stock  transfer  taxes  on the  purchase  of  Shares  by Purchaser
pursuant to the Offer.

    5.  The Offer and withdrawal rights will expire at 12:00 Midnight, New  York
City time, on Tuesday, April 26, 1994, unless the Offer is extended.

    6.   Notwithstanding  any other provision  of the Offer,  payment for Shares
accepted for payment pursuant to the Offer will in all cases be made only  after
timely  receipt by  the Depositary  of (a) certificates  for such  Shares and or
timely confirmation of the book-entry transfer  of such Shares into the  account
maintained  by The Bank of  New York (the "Depositary")  at The Depository Trust
Company, the Midwest  Securities Trust  Company or  the Philadelphia  Depository
Trust  Company (collectively, the "Book-Entry Transfer Facilities"), pursuant to
the procedures set forth in Section 3  of the Offer to Purchase, (b) the  Letter
of  Transmittal (or a facsimile thereof),  properly completed and duly executed,
with any  required  signature  guarantees  (or, in  the  case  of  a  book-entry
transfer, an Agent's Message (as defined in the Offer to Purchase)), and (c) any
other  documents required by the Letter of Transmittal. Accordingly, payment may
not be made to all tendering stockholders  at the same time depending upon  when
Share  Certificates or confirmations of book-entry  transfer of such Shares into
the Depositary's account at a Book-Entry Transfer Facility are actually received
by the Depositary.

    If you wish to have us tender any or  all of the Shares held by us for  your
account, please so instruct us by completing, executing, detaching and returning
to  us the instruction  form set forth on  the next page of  this letter. If you
authorize the tender  of your Shares,  all such Shares  will be tendered  unless
otherwise  specified on the next page of this letter. An envelope to return your
instructions to us is enclosed. Your  instructions should be forwarded to us  in
ample  time  to  permit us  to  submit a  tender  on  your behalf  prior  to the
expiration of the Offer.

    The Offer is  not being made  to (nor will  tenders be accepted  from or  on
behalf of) holders of Shares residing in any jurisdiction in which the making of
the  Offer  or  the acceptance  thereof  would  not be  in  compliance  with the
securities, blue sky or other laws of such jurisdiction. However, the  Purchaser
may,  in its discretion, take  such action as it may  deem necessary to make the
Offer in any  jurisdiction and extend  the Offer  to holders of  Shares in  such
jurisdiction.

    In any jurisdiction where the securities, blue sky or other laws require the
Offer  to be made by a licensed broker or dealer, the Offer will be deemed to be
made on behalf of  the Purchaser by  one or more  registered brokers or  dealers
that are licensed under the laws of such jurisdiction.

                                       2
<PAGE>
               INSTRUCTIONS WITH RESPECT TO THE OFFER TO PURCHASE
                FOR CASH ALL OUTSTANDING SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)

                                       OF

                           MARK CONTROLS CORPORATION

    The undersigned acknowledge(s) receipt of your letter and the enclosed Offer
to  Purchase  dated March  30, 1994  and  the related  Letter of  Transmittal in
connection with the  offer by  Crane Acquisition Corp.,  a Delaware  corporation
(the  "Purchaser")  and  a wholly  owned  subsidiary  of Crane  Co.,  a Delaware
corporation, to purchase all outstanding shares of Common Stock, par value  $.01
per  share  (the  "Common  Stock"), of  Mark  Controls  Corporation,  a Delaware
corporation, and the  associated Series  A Stock Purchase  Rights (the  "Rights"
and, together with the Common Stock, the "Shares").

    This  will instruct  you to  tender to  the Purchaser  the number  of Shares
indicated below (or if no number is indicated below, all Shares) which are  held
by  you for the  account of the undersigned,  upon the terms  and subject to the
conditions set forth in the Offer.

<TABLE>
<S>        <C>                                       <C>
           Number of Shares to Be Tendered
                           Shares
           ---------
           Date:
                ---------------------
                          SIGN HERE
           Signature(s)
                       ----------------------------
           (Print Name(s))
                          -------------------------
           (Print Address(s))
                            -----------------------
           (Area Code and
           Telephone Number(s))
           ----------------------------------------
           (Taxpayer Identification or
           Social Security Number(s))
                                    ---------------
</TABLE>

                                       3

<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9

GUIDELINES  FOR DETERMINING THE PROPER IDENTIFICATION  NUMBER TO GIVE THE PAYOR.
Social Security  numbers  have  nine  digits  separated  by  two  hyphens:  i.e.
000-00-0000.  Employer identification numbers have nine digits separated by only
one hyphen: i.e. 00-0000000. The table  below will help determine the number  to
give the payor.

<TABLE>
<CAPTION>
<C>        <S>                    <C>
- -----------------------------------------------------------
                                  GIVE THE
                                  SOCIAL SECURITY
                                  NUMBER OF--
FOR THIS TYPE OF ACCOUNT
- -----------------------------------------------------------
</TABLE>

<TABLE>
<C>        <S>                      <C>
       1.  An individual's account  The individual
       2.  Two or more individuals  The actual owner of the
           (joint account)          account or, if combined
                                    funds, the first
                                    individual on the
                                    account(1)
       3.  Custodian account of a   The minor(2)
           minor (Uniform Gift to
           Minors Act)
       4.  (a) The usual revocable  The grantor-trustee(1)
               savings trust
               account (grantor is
               also trustee)
           (b) So-called trust      The actual owner(1)
               account that is not
               a legal or valid
               trust under state
               law
       5.  Sole proprietorship      The owner(3)
           account

                                   GIVE THE EMPLOYER
FOR THIS TYPE OF                   IDENTIFICATION
ACCOUNT                            NUMBER

      6.  Sole proprietorship      The owner(3)
           account
       7.  A valid trust, estate    The legal entity (Do not
           or pension trust         furnish the identifying
                                    number of the personal
                                    representative or trustee
                                    unless the legal entity
                                    itself is not designated
                                    in the account title.)(4)
       8.  Corporate account        The corporation
       9.  Association, club,       The organization
           religious, charitable
           educational or other
           tax-exempt organization
           account
      10.  Partnership account      The partnership
      11.  A broker or registered   The broker or nominee
           nominee
      12.  Account with the         The public entity
           Department of
           Agriculture in the name
           of a public entity
           (such as a state or
           local government,
           school district or
           prison) that receives
           agricultural program
           payments

- --------------------------------------------------------------------------------
<FN>
(1) List first and circle the name of the person whose number you furnish.

(2) Circle the minor's name and furnish the minor's social security number.

(3) Show the name of the individual. You may also enter the business name. You
may use your SSN or EIN.

(4) List first and circle the name of the legal trust, estate, or pension trust.

</TABLE>

Note: If no name is circled when there is more than one name, the number will be
considered to be that of the first name listed.
<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                     PAGE 2

OBTAINING A NUMBER

If you don't have a taxpayer identification number or you don't know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number, at the local office of the
Social Security Administration or the Internal Revenue Service and apply for a
number.

PAYEES EXEMPT FROM BACKUP WITHHOLDING

Payees specifically exempted from backup withholding on ALL payments include the
following:

- - A corporation.

- - An organization exempt from tax under section 501(a),
  or an individual retirement plan, or a custodial account under section
  403(b)(7).

- - The United States or any agency or instrumentality
  thereof.

- - A state, the District of Columbia, a possession of the
  United States, or any political subdivision or instrumentality thereof.

- - A foreign government or any political subdivision,
  agency or instrumentality thereof.

- - An international organization or any agency or
  instrumentality thereof.

- - A foreign central bank of issue.

- - A registered dealer in securities or commodities
  registered in the U.S. or a possession of the U.S.

- - A real estate investment trust.

- - An entity registered at all times during the tax year
  under the Investment Company Act of 1940.

- - A common trust fund operated by a bank under
  section 584(a).

- - A financial institution.

- - A middleman known in the investment community as
  a nominee or listed in the most recent publication of the American Society of
  Corporate Secretaries, Inc., Nominee List.

- - A    trust   exempt   from   tax   under   section   664   as   described   in
  section 4947.

Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:

- - Payments to nonresident aliens subject to withholding
  under section 1441.

- - Payments to partnerships not engaged in a trade or
  business in the U.S. and which have at least one nonresident partner.

- - Payments of patronage dividends where the amount
  received is not paid in money.

- - Payments made by certain foreign organizations.

Payments of interest not generally subject to backup withholding include the
following:

- - Payments of interest on obligations issued by
  individuals.
  NOTE: You may be subject to backup withholding if this interest is $600 or
  more and is paid in the course of the payor's trade or business and you have
  not provided your correct taxpayer identification number to the payor.

- - Payments of tax-exempt interest (including exempt-
  interest dividends under section 852).

- - Payments described in section 6049(b)(5) to
  nonresident aliens.

- - Payments on tax-free covenant bonds under section
  1451.

- - Payments made by certain foreign organizations.

- - Mortgage interest paid to you.

Exempt payees described above should file Form W-9 to avoid possible erroneous
backup withholding. FILE THIS FORM WITH THE PAYOR, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, AND RETURN IT TO
THE PAYOR. ALSO SIGN AND DATE THE FORM.

Certain payments other than interest, dividends, and patronage dividends that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under sections 6041, 6041A(a),
6042, 6044, 6045, 6049, 6050A and 6050N.

PRIVACY ACT NOTICE.--Section 6109 requires most recipients of dividend interest
or other payments to give taxpayer identification numbers to payors who must
report the payments to the IRS. The IRS uses the numbers for identification
purposes. Payors must be given the numbers whether or not recipients are
required to file tax returns. Payors must generally withhold 31% of taxable
interest, dividend and certain other payments to a payee who does not furnish a
taxpayer identification number to a payor. Certain penalties may also apply.

PENALTIES

(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER.--If you fail
to furnish your taxpayer identification number to a payor, you are subject to a
penalty of $50 for each such failure unless your failure is due to reasonable
cause and not to willful neglect.

(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING.--If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.

(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. --Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.

                           FOR ADDITIONAL INFORMATION
                         CONTACT YOUR TAX CONSULTANT OR
                          THE INTERNAL REVENUE SERVICE

<PAGE>

                                  NEWS RELEASE

         CRANE CO. COMMENCES $19.50 CASH TENDER OFFER FOR MARK CONTROLS


          STAMFORD, CONNECTICUT (MARCH 30, 1994) - Crane Co. (NYSE: CR),
announced today that its subsidiary, Crane Acquisition Corp., has commenced its
previously announced tender offer to purchase all outstanding shares of common
stock of Mark Controls Corporation (NASDAQ: MRCC) at $19.50 net per share in
cash.

          The offer will expire at 12:00 midnight, New York City time, on
Tuesday, April 26, 1994, unless extended.

          The Information Agent for the Offer is Beacon Hill Partners, Inc.

          The tender offer materials are being filed with the U.S. Securities
and Exchange Commission. Copies of these materials may be obtained by calling
Beacon Hill Partners, Inc. toll-free at (800) 755-5001.


                                  #   #   #   #

Contact:  D. L. Kelley, Crane Co., Stamford, CT
203/363-7239


<PAGE>
    This  announcement is neither an offer to  purchase nor a solicitation of an
offer to sell Shares. The  Offer is made solely by  the Offer to Purchase  dated
March  30, 1994 and the related Letter of  Transmittal, and is being made to all
holders of Shares. The Purchaser is not  aware of any state where the making  of
the  Offer is  prohibited by administrative  or judicial action  pursuant to any
valid state statute. If the Purchaser  becomes aware of any valid state  statute
prohibiting  the  making  of the  Offer  or  the acceptance  of  Shares pursuant
thereto, the Purchaser will make a good  faith effort to comply with such  state
statute. If, after such good faith effort, the Purchaser cannot comply with such
state  statute, the Offer will not be made to (nor will tenders be accepted from
or on behalf of) the holders of Shares in such state. In any jurisdiction  where
the  securities,  blue sky  or other  laws require  the  Offer to  be made  by a
licensed broker or dealer, the Offer shall be deemed to be made on behalf of the
Purchaser by one or more registered  brokers or dealers licensed under the  laws
of such jurisdiction.

                      NOTICE OF OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
           (INCLUDING THE ASSOCIATED SERIES A STOCK PURCHASE RIGHTS)
                                       OF
                           MARK CONTROLS CORPORATION
                                       AT
                              $19.50 NET PER SHARE
                                       BY
                            CRANE ACQUISITION CORP.
                          A WHOLLY OWNED SUBSIDIARY OF
                                   CRANE CO.

    Crane  Acquisition  Corp., a  Delaware corporation  (the "Purchaser")  and a
wholly owned subsidiary of Crane  Co., a Delaware corporation ("Crane"),  hereby
offers to purchase all of the outstanding shares of Common Stock, par value $.01
per  share  (the  "Common  Stock"), of  Mark  Controls  Corporation,  a Delaware
corporation (the "Company"), and the  associated Series A Stock Purchase  Rights
(the  "Rights" and, together with the Common Stock, the "Shares"), at a price of
$19.50 per Share, net to the seller  in cash without interest thereon, upon  the
terms  and subject to the  conditions set forth in  the Offer to Purchase, dated
March 30,  1994  (the  "Offer  to  Purchase"), and  in  the  related  Letter  of
Transmittal (which together constitute the "Offer").

  THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
             TIME, ON APRIL 26, 1994, UNLESS THE OFFER IS EXTENDED.
<PAGE>
    The  Offer  is conditioned  upon, among  other  things, there  being validly
tendered and not withdrawn  prior to the Expiration  Date that number of  Shares
which,  together with  the Shares  beneficially owned  by the  Purchaser and its
affiliates, represents at least a majority of the Shares outstanding on a  fully
diluted basis on the date of purchase. Crane now owns approximately 13.2% of the
currently  outstanding Shares of the Company. The Offer is also subject to other
terms and conditions contained in the Offer to Purchase. See Sections 14 and  15
of the Offer to Purchase.

    The purpose of the Offer is for Crane, through the Purchaser, to acquire the
entire equity interest in the Company. Crane already owns approximately 13.2% of
the  outstanding  Shares.  Crane  currently  intends,  as  soon  as  practicable
following consummation of the Offer, to propose and seek to have the Company, if
it is then legally and contractually permitted to do so, consummate a merger  or
similar  business combination with  the Purchaser or  another direct or indirect
wholly owned subsidiary of Crane (the "Proposed Merger"), pursuant to which each
then outstanding Share (other than Shares  owned by the Purchaser, Crane or  any
of  their affiliates,  Shares held  in the treasury  of the  Company, and Shares
owned by  stockholders who  perfect  any available  appraisal rights  under  the
Delaware  General Corporation Law) would be  converted into the right to receive
an amount in cash equal to the price per Share paid pursuant to the Offer.

    The term "Expiration  Date" means  12:00 Midnight,  New York  City time,  on
April  26, 1994, unless and  until the Purchaser, in  its sole discretion, shall
have extended the period of time for which the Offer is open, in which event the
term "Expiration Date" shall mean the latest  time and date at which the  Offer,
as so extended by the Purchaser, shall expire.

    For purposes of the Offer, the Purchaser will be deemed to have accepted for
payment, and thereby purchased, Shares validly tendered and not withdrawn as, if
and when the Purchaser gives oral or written notice to The Bank of New York (the
"Depositary")  of the Purchaser's acceptance of such Shares for payment pursuant
to the Offer. In all cases, upon the terms and subject to the conditions of  the
Offer,  payment  for Shares  purchased pursuant  to  the Offer  will be  made by
deposit of the purchase  price therefor with the  Depositary, which will act  as
agent  for tendering stockholders for the  purpose of receiving payment from the
Purchaser and transmitting payment to  validly tendering stockholders. UNDER  NO
CIRCUMSTANCES  WILL INTEREST  ON THE  PURCHASE PRICE FOR  SHARES BE  PAID BY THE
PURCHASER BY REASON OF ANY DELAY IN  MAKING SUCH PAYMENT. In all cases,  payment
for  Shares  purchased pursuant  to the  Offer  will be  made only  after timely
receipt by  the  Depositary  of (a)  certificates  representing  Shares  ("Share
Certificates")  or  a  Book-Entry  Confirmation  (as  defined  in  the  Offer to
Purchase) of  the  book-entry transfer  of  such Shares  into  the  Depositary's
account at the Depository Trust Company, the Midwest Securities Trust Company or
the   Philadelphia  Depository  Trust  Company  (collectively,  the  "Book-Entry
Transfer Facilities"), pursuant to the procedures set forth in Section 3 of  the
Offer  to  Purchase, (b)  the  Letter of  Transmittal  (or a  facsimile thereof)
properly completed and duly executed, with any required signature guarantees  or
an  Agent's Message (as defined  in the Offer to  Purchase) in connection with a
book-entry transfer,  and (c)  any other  documents required  by the  Letter  of
Transmittal.

    If, for any reason whatsoever, acceptance for payment of any Shares tendered
pursuant  to the  Offer is  delayed, or  the Purchaser  is unable  to accept for
payment or  pay  for  Shares  tendered pursuant  to  the  Offer,  then,  without
prejudice  to the  Purchaser's rights  set forth in  the Offer  to Purchase, the
Depositary may, nevertheless, on behalf of the Purchaser retain tendered  Shares
and  such Shares may  not be withdrawn  except to the  extent that the tendering
stockholder is entitled to and duly exercises withdrawal rights as described  in
Section  4 of the Offer to  Purchase. Any such delay will  be by an extension of
the Offer to the extent required by law.

    If certain events occur, the Purchaser  will not be obligated to accept  for
payment  or pay for any  Shares tendered pursuant to  the Offer. If any tendered
Shares are not  purchased pursuant  to the  Offer for  any reason,  or if  Share
Certificates  are submitted  representing more  Shares than  are tendered, Share
Certificates representing  unpurchased or  untendered Shares  will be  returned,
without  expense  to  the  tendering  stockholder (or,  in  the  case  of Shares
delivered by book-entry transfer into the

                                       2
<PAGE>
Depositary's  account  at  a  Book-Entry  Transfer  Facility,  pursuant  to  the
procedures  set forth in Section 3 of the Offer to Purchase, such Shares will be
credited to an account maintained within such Book-Entry Transfer Facility),  as
promptly  as practicable following the  expiration, termination or withdrawal of
the Offer.

    The Purchaser expressly reserves the right,  in its sole discretion, at  any
time  and from time to time, to extend the period during which the Offer is open
for any reason, including the occurrence  of any of the conditions specified  in
Section  14 of the Offer  to Purchase, by giving oral  or written notice of such
extension to the Depositary. Any such extension will be followed as promptly  as
practicable  by public announcement thereof, and  such announcement will be made
no later than 9:00 A.M., New York City time, on the next business day after  the
previously  scheduled  Expiration Date.  During any  such extension,  all Shares
previously tendered  and not  withdrawn will  remain subject  to the  Offer  and
subject  to the right of a  tendering stockholder to withdraw such stockholder's
Shares.

    Except as otherwise  provided for  in Section 4  of the  Offer to  Purchase,
tenders  of Shares made  pursuant to the Offer  are irrevocable. Shares tendered
pursuant to the Offer may be withdrawn at any time on or prior to the Expiration
Date and,  unless theretofore  accepted for  payment pursuant  to the  Offer  to
Purchase,  may also be withdrawn at any time  after May 28, 1994. In order for a
withdrawal to  be  effective, a  written  or facsimile  transmission  notice  of
withdrawal must be timely received by the Depositary at one of its addresses set
forth  on the back cover of the Offer to Purchase. Any such notice of withdrawal
must specify the name of the person who tendered the Shares to be withdrawn, the
number of Shares to be withdrawn, and (if Share Certificates have been tendered)
the name  of the  registered holder  of the  Shares as  set forth  in the  Share
Certificate,  if different from that of the  person who tendered such Shares. If
Share  Certificates  have  been  delivered   or  otherwise  identified  to   the
Depositary,  then  prior  to  the physical  release  of  such  certificates, the
tendering stockholder must  submit the  serial numbers shown  on the  particular
certificates  evidencing the  Shares to  be withdrawn  and the  signature on the
notice of withdrawal must be guaranteed  by an Eligible Institution (as  defined
in the Offer to Purchase), except in the case of Shares tendered for the account
of  an  Eligible  Institution. If  Shares  have  been tendered  pursuant  to the
procedures for book-entry transfer  as set forth  in Section 3  of the Offer  to
Purchase,  the notice  of withdrawal  must specify  the name  and number  of the
account at the appropriate Book-Entry Transfer Facility to be credited with  the
withdrawn  Shares, in  which case  a notice of  withdrawal will  be effective if
delivered to the  Depositary by any  method of delivery  described in the  third
sentence  of this  paragraph. Withdrawals  of Shares  may not  be rescinded. Any
Shares properly withdrawn will  be deemed not validly  tendered for purposes  of
the  Offer, but may be retendered at any subsequent time prior to the Expiration
Date by following any of the procedures  described in Section 3 of the Offer  to
Purchase.  All questions as to the form and validity (including time of receipt)
of notices  of withdrawal  will be  determined  by the  Purchaser, in  its  sole
discretion, whose determination will be final and binding.

    The  information required  to be disclosed  by Rule  14d-6(e)(1)(vii) of the
General Rules and  Regulations under  the Securities  Exchange Act  of 1934,  as
amended  (the "Exchange  Act"), is  contained in  the Offer  to Purchase  and is
incorporated herein by reference.

    A request  is being  made  to the  Company pursuant  to  Rule 14d-5  of  the
Exchange Act for the use of the Company's stockholder list and security position
listings  for the purpose of disseminating the  Offer to holders of Shares. Upon
compliance by the Company with  such request or the  election by the Company  to
disseminate  the Offer  in lieu  of complying  with such  request, the  Offer to
Purchase and the related Letter of Transmittal and, if required, other  relevant
materials  will be mailed to  record holders of Shares  and will be furnished to
brokers, dealers, commercial  banks, trust companies  and similar persons  whose
names,  or the names  of whose nominees,  appear on the  stockholder list or, if
applicable, who  are listed  as  participants in  a clearing  agency's  security
position listing, for subsequent transmittal to beneficial owners of Shares.

    THE  OFFER  TO  PURCHASE AND  THE  LETTER OF  TRANSMITTAL  CONTAIN IMPORTANT
INFORMATION WHICH SHOULD  BE READ  CAREFULLY BEFORE  ANY DECISION  IS MADE  WITH
RESPECT TO THE OFFER.

                                       3
<PAGE>
    Questions  and requests  for assistance may  be directed  to the Information
Agent at its address and telephone number  listed below. Copies of the Offer  to
Purchase,  the Letter of Transmittal and other related materials may be obtained
from the Information Agent or from brokers, dealers, commercial banks and  trust
companies.  The  Purchaser will  not  pay any  fees  or commissions  to brokers,
dealers or  other persons  (other  than the  Information Agent)  for  soliciting
tenders of Shares pursuant to the Offer.

                    THE INFORMATION AGENT FOR THE OFFER IS:

                           BEACON HILL PARTNERS, INC.
                                90 BROAD STREET
                               NEW YORK, NY 10004
                           TOLL FREE: (800) 755-5001

March 30, 1994

                                       4

<PAGE>
                      WITHDRAWAL OF SHARES OF COMMON STOCK
                                       OF
                           MARK CONTROLS CORPORATION
                   TENDERED PURSUANT TO THE OFFER TO PURCHASE
                                       BY
                          MRCC ACQUISITION CORPORATION
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              DANAHER CORPORATION
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

To Holders of Common Stock of Mark Controls Corporation
Who Have Tendered Shares Pursuant to the Offer of
MRCC Acquisition Corporation, a wholly owned subsidiary
of Danaher Corporation:

    In  connection with the  offer to purchase  the shares of  common stock, par
value $.01 per  share (the "Common  Stock"), of Mark  Controls Corporation  (the
"Company"), and the associated Series A Stock Purchase Rights (the "Rights" and,
together  with the Common Stock, the  "Shares"), by Crane Acquisition Corp. (the
"Purchaser"), a Delaware corporation and a wholly owned subsidiary of Crane Co.,
a Delaware corporation,  described in  the Purchaser's Offer  to Purchase  dated
March  30, 1994 and the related Letter  of Transmittal (which, together with any
amendments or  supplements thereto,  constitute  the "Purchaser's  Offer"),  the
Purchaser,  for  the  convenience of  holders  of  Shares, has  provided  on the
attached page a form of "Notice of Withdrawal" which, if properly completed  and
delivered  to  Continental Bank,  National Association,  the Depositary  for the
Danaher Tender Offer (as defined below), will enable holders of Shares  properly
to  withdraw Shares tendered pursuant to the  Danaher Tender Offer. Such form, a
facsimile thereof or any other proper  notice of withdrawal may be delivered  by
hand  or sent by telegraphic or  facsimile transmission or letter to Continental
Bank, National Association.

    SHARES HELD  BY CONTINENTAL  BANK, NATIONAL  ASSOCIATION UNDER  THE  DANAHER
TENDER OFFER MUST FIRST BE WITHDRAWN BEFORE THEY CAN BE TENDERED PURSUANT TO THE
PURCHASER'S  OFFER. STOCKHOLDERS WHO DESIRE ASSISTANCE IN WITHDRAWING THE SHARES
TENDERED PURSUANT TO THE DANAHER TENDER OFFER MAY CONTACT THE INFORMATION  AGENT
FOR THE PURCHASER'S OFFER AT ITS ADDRESS AND TELEPHONE NUMBER SET FORTH BELOW.

    Section 4 of the Offer to Purchase dated March 22, 1994 (the "Danaher Tender
Offer")  of MRCC Acquisition  Corporation, a wholly  owned subsidiary of Danaher
Corporation, offering to purchase Shares,  sets forth the applicable  procedures
whereby  Shares that have been tendered pursuant to the Danaher Tender Offer may
properly be withdrawn.

       SECTION 4  OF THE  DANAHER  TENDER OFFER  PROVIDES  IN RELEVANT  PART  AS
       FOLLOWS:

           "For  a withdrawal to be  effective, a written, telegraphic or
       facsimile  transmission  notice  of  withdrawal  must  be   timely
       received  by the Depositary  at one of its  addresses set forth on
       the back  cover of  this Offer  to Purchase.  Any such  notice  of
       withdrawal  must specify the  name of the  person who tendered the
       Shares to be withdrawn, the number  of Shares to be withdrawn  and
       the  name of the registered holder,  if different from that of the
       person who tendered such Shares.  If certificates for Shares  have
       been  delivered or  otherwise identified to  the Depositary, then,
       prior to the release of  such certificates, the serial numbers  of
       the  particular certificates evidencing the Shares to be withdrawn
       and a signed notice of withdrawal with signatures guaranteed by an
       Eligible Institution, except  in the case  of Shares tendered  for
       the  account of an Eligible Institution, must also be furnished to
       the Depositary as  described above. If  Shares have been  tendered
       pursuant to the procedures for book-entry transfer as set forth in
       Section 3 [of the Danaher Tender Offer],
<PAGE>
       any  notice of withdrawal must also specify the name and number of
       the account at the appropriate Book-Entry Transfer Facility to  be
       credited with the withdrawn Shares."

    Copies  of the Purchaser's Offer dated March 30, 1994, and related Letter of
Transmittal,  are  also  available  from  the  Information  Agent.  Upon  proper
withdrawal  of  Shares from  the Danaher  Tender Offer,  Shares may  be tendered
pursuant to the Purchaser's Offer, which will expire at 12:00 Midnight, New York
City time, on Tuesday, April 26, 1994, unless extended.

              THE INFORMATION AGENT FOR THE PURCHASER'S OFFER IS:

                           BEACON HILL PARTNERS, INC.
                                90 BROAD STREET
                               NEW YORK, NY 10004
                           TOLL FREE: (800) 755-5001
<PAGE>
                                   NOTICE OF
                      WITHDRAWAL OF SHARES OF COMMON STOCK
                                       OF
                           MARK CONTROLS CORPORATION
                         TENDERED PURSUANT TO THE OFFER
                        TO PURCHASE DATED MARCH 22, 1994
                                       BY
                          MRCC ACQUISITION CORPORATION
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              DANAHER CORPORATION

           TO: CONTINENTAL BANK, NATIONAL ASSOCIATION ("DEPOSITARY")

<TABLE>
<S>                              <C>                            <C>
                              FACSIMILE TRANSMISSION NUMBER:
                                      (312) 923-0271
           BY MAIL:               (FOR ELIGIBLE INSTITUTIONS    BY HAND/OVERNIGHT DELIVERY:
    Continental Bank, N.A.                   ONLY)               231 South LaSalle Street
Corporate Depositary Operations      CONFIRM BY TELEPHONE:              19th Floor
        P.O. Box 805857                 (312) 828-5110              (Clark Street Side)
 Chicago, Illinois 60680-4120        FOR INFORMATION CALL:                Window
                                        (800) 962-9324            Chicago, Illinois 60697
</TABLE>

LADIES AND GENTLEMEN:

    The undersigned hereby withdraws the shares of common stock, par value $0.01
per share  (the "Common  Stock"), and  the associated  Series A  Stock  Purchase
Rights (the "Rights" and, together with the Common Stock, the "Shares"), of Mark
Controls Corporation described below.

                        DESCRIPTION OF SHARES WITHDRAWN

Names of tendering stockholder(s) ______________________________________________

Names of registered holder(s) (if different) ___________________________________

Number of Shares withdrawn _____________________________________________________

                    FURTHER DESCRIPTION OF SHARES WITHDRAWN

                (to be completed only if certificates have been
                      delivered or otherwise identified to
                     Continental Bank, National Association
                      or tendered by book-entry transfer)

Certificate Number(s)* _________________________________________________________

If applicable, Book-Entry Transfer Facility account number _____________________

Name of Book-Entry Transfer Facility account ___________________________________

                        (MUST BE SIGNED ON REVERSE SIDE)

* CALL  BEACON HILL PARTNERS, INC. TOLL FREE AT (800) 755-5001 FOR ASSISTANCE IF
  YOU DO NOT HAVE YOUR CERTIFICATE NUMBER(S)
<PAGE>
                             STOCKHOLDER SIGN HERE

    (Must be  signed by  registered holder(s)  exactly as  name(s) appear(s)  on
stock  certificates or on a security position listing or by person(s) authorized
to  become  registered  holder(s)  by  certificates  and  documents   previously
transmitted  or transmitted  herewith. If signature  is by  a trustee, executor,
administrator, guardian,  attorney-in-fact, officer  of a  corporation or  other
person  acting in a fiduciary or  representative capacity, please set forth full
title of such person.)

 ...............................................................................

 ...............................................................................
                         Signature(s) of Stockholder(s)

Dated: ___________________

Name(s) ________________________________________________________________________
                                  Please Print

Capacity (full title) __________________________________________________________

Address ________________________________________________________________________

 _______________________________________________________________________________
                                                            (Including Zip Code)

(Area Code and Tel. No.) _______________________________________________________

                              SIGNATURE GUARANTEE

(REQUIRED IF  CERTIFICATES  HAVE  BEEN  DELIVERED  OR  OTHERWISE  IDENTIFIED  TO
CONTINENTAL BANK, NATIONAL ASSOCIATION)

Authorized Signature ___________________________________________________________

Name ___________________________________________________________________________

Title __________________________________________________________________________

Name of Firm ___________________________________________________________________

Address ________________________________________________________________________

 _______________________________________________________________________________
                                                            (Including Zip Code)

(Area Code and Tel No.) ________________________________________________________

Dated:  ____________, 1994
<PAGE>
                      WITHDRAWAL OF SHARES OF COMMON STOCK
                                       OF
                           MARK CONTROLS CORPORATION
                   TENDERED PURSUANT TO THE OFFER TO PURCHASE
                                       BY
                             TYCO ACQUISITION CORP.
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                            TYCO INTERNATIONAL LTD.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

To Holders of Common Stock of Mark Controls Corporation
Who Have Tendered Shares Pursuant to the Offer of
Tyco Acquisition Corp., a wholly owned subsidiary
of Tyco International Ltd.:

    In  connection with the  offer to purchase  the shares of  common stock, par
value $.01 per  share (the "Common  Stock"), of Mark  Controls Corporation  (the
"Company"), and the associated Series A Stock Purchase Rights (the "Rights" and,
together  with the Common Stock, the  "Shares"), by Crane Acquisition Corp. (the
"Purchaser"), a Delaware corporation and a wholly owned subsidiary of Crane Co.,
a Delaware corporation,  described in  the Purchaser's Offer  to Purchase  dated
March  30, 1994 and the related Letter  of Transmittal (which, together with any
amendments or  supplements thereto,  constitute  the "Purchaser's  Offer"),  the
Purchaser,  for  the  convenience of  holders  of  Shares, has  provided  on the
attached page a form of "Notice of Withdrawal" which, if properly completed  and
delivered  to Mellon Bank,  N.A., the Depositary  for the Tyco  Tender Offer (as
defined below),  will  enable holders  of  Shares properly  to  withdraw  Shares
tendered  pursuant to the Tyco  Tender Offer. Such form,  a facsimile thereof or
any other  proper notice  of withdrawal  may be  delivered by  hand or  sent  by
telegraphic, telex or facsimile transmission or letter to Mellon Bank, N.A.

    SHARES  HELD BY MELLON BANK, N.A. UNDER  THE TYCO TENDER OFFER MUST FIRST BE
WITHDRAWN BEFORE  THEY  CAN  BE  TENDERED PURSUANT  TO  THE  PURCHASER'S  OFFER.
STOCKHOLDERS  WHO DESIRE ASSISTANCE IN  WITHDRAWING THE SHARES TENDERED PURSUANT
TO THE TYCO TENDER OFFER MAY  CONTACT THE INFORMATION AGENT FOR THE  PURCHASER'S
OFFER AT ITS ADDRESS AND TELEPHONE NUMBER SET FORTH BELOW.

    Section  3 of the Offer  to Purchase dated March  24, 1994 (the "Tyco Tender
Offer")  of  Tyco  Acquisition  Corp.,   a  wholly  owned  subsidiary  of   Tyco
International  Ltd.,  offering to  purchase  Shares, sets  forth  the applicable
procedures whereby Shares that  have been tendered pursuant  to the Tyco  Tender
Offer may properly be withdrawn.

      SECTION 3 OF THE TYCO TENDER OFFER PROVIDES IN RELEVANT PART AS FOLLOWS:

           "For  a withdrawal  to be  effective, a  written, telegraphic,
       telex or  facsimile  transmission  notice of  withdrawal  must  be
       timely  received by  the Depositary  at one  of its  addresses set
       forth on the back cover of  this Offer to Purchase. Any notice  of
       withdrawal  must specify the  name of the  person who tendered the
       Shares to be withdrawn, the number  of Shares to be withdrawn  and
       the  name in which  the certificates representing  such Shares are
       registered, if different from that of the person who tendered such
       Shares. If  certificates  for Shares  to  be withdrawn  have  been
       delivered  or otherwise  identified to the  Depositary, the serial
       numbers shown  on  the  particular  certificates  evidencing  such
       Shares  to be withdrawn  must also be  furnished to the Depositary
       prior to  the physical  release  of the  Shares to  be  withdrawn,
       together  with  a  signed  notice  of  withdrawal  with signatures
       guaranteed by  an Eligible  Institution (except,  with respect  to
       signature  guarantees,  in  the  case  of  Shares  tendered  by an
       Eligible Institution). If Shares  have been delivered pursuant  to
       the  procedures for book-entry transfer set forth in Section 2 [of
       the Tyco Tender
<PAGE>
       Offer], any notice of withdrawal must specify the name and  number
       of  the account at the appropriate Book-Entry Transfer Facility to
       be credited with  the withdrawn Shares  and must otherwise  comply
       with such Book-Entry Facility's procedures."

    Copies  of the Purchaser's Offer dated March 30, 1994, and related Letter of
Transmittal,  are  also  available  from  the  Information  Agent.  Upon  proper
withdrawal of Shares from the Tyco Tender Offer, Shares may be tendered pursuant
to  the Purchaser's Offer,  which will expire  at 12:00 Midnight,  New York City
time, on Tuesday, April 26, 1994, unless extended.

              THE INFORMATION AGENT FOR THE PURCHASER'S OFFER IS:

                           BEACON HILL PARTNERS, INC.
                                90 BROAD STREET
                               NEW YORK, NY 10004
                           TOLL FREE: (800) 755-5001
<PAGE>
                                   NOTICE OF
                      WITHDRAWAL OF SHARES OF COMMON STOCK
                                       OF
                           MARK CONTROLS CORPORATION
                         TENDERED PURSUANT TO THE OFFER
                        TO PURCHASE DATED MARCH 24, 1994
                                       BY
                             TYCO ACQUISITION CORP.
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                            TYCO INTERNATIONAL LTD.

                      TO: MELLON BANK, N.A. ("DEPOSITARY")

<TABLE>
<S>                   <C>                    <C>                         <C>
      BY MAIL:            BY FACSIMILE           OVERNIGHT EXPRESS               BY HAND:
 Mellon Bank, N.A.        TRANSMISSION:             MAIL COURIER            Mellon Bank, N.A.
     c/o Mellon           (For Eligible          Mellon Bank, N.A.        c/o Mellon Securities
     Securities        Institutions only)      c/o Mellon Securities          120 Broadway,
Post Office Box 798      (201) 296-4062          85 Challenger Road             33rd Floor
  Midtown Station     CONFIRM BY TELEPHONE:       Overpeck Centre           New York, NY 10271
 New York, NY 10018      1-800-777-3674      Ridgefield Park, NJ 07660
                                             Attn: Reorganization Dept.
</TABLE>

LADIES AND GENTLEMEN:

    The undersigned hereby withdraws the shares of common stock, par value $0.01
per share  (the "Common  Stock"), and  the associated  Series A  Stock  Purchase
Rights (the "Rights" and, together with the Common Stock, the "Shares"), of Mark
Controls Corporation described below.

                        DESCRIPTION OF SHARES WITHDRAWN

Names of tendering stockholder(s) ______________________________________________

Names of registered holder(s) (if different) ___________________________________

Number of Shares withdrawn _____________________________________________________

                    FURTHER DESCRIPTION OF SHARES WITHDRAWN

                (to be completed only if certificates have been
                      delivered or otherwise identified to
                               Mellon Bank, N.A.
                      or tendered by book-entry transfer)

Certificate Number(s)* _________________________________________________________

If applicable, Book-Entry Transfer Facility account number _____________________

Name of Book-Entry Transfer Facility account ___________________________________

                        (MUST BE SIGNED ON REVERSE SIDE)

* CALL  BEACON HILL PARTNERS, INC. TOLL FREE AT (800) 755-5001 FOR ASSISTANCE IF
  YOU DO NOT HAVE YOUR CERTIFICATE NUMBER(S)
<PAGE>
                             STOCKHOLDER SIGN HERE

    (Must be  signed by  registered holder(s)  exactly as  name(s) appear(s)  on
stock  certificate(s)  or  on  a  security  position  listing  or  by  person(s)
authorized  to  become  registered  holder(s)  by  certificates  and   documents
previously  transmitted or transmitted  herewith. If signature  is by a trustee,
executor,  administrator,  guardian,  attorney-in-fact,  agent,  officer  of   a
corporation  or other person  acting in a  fiduciary or representative capacity,
please provide the following information.)

 ...............................................................................

 ...............................................................................
                      Signature(s) of Holder(s) of Shares

Dated: ___________________

Name(s) ________________________________________________________________________
                                  Please Print

Capacity (full title) __________________________________________________________

Address ________________________________________________________________________

________________________________________________________________________________
                                                            (Including Zip Code)

(Area Code and Tel. No.) _______________________________________________________

                              SIGNATURE GUARANTEE

(REQUIRED IF CERTIFICATES HAVE BEEN DELIVERED OR OTHERWISE IDENTIFIED TO  MELLON
BANK, N.A.)

Authorized Signature ___________________________________________________________

Name ___________________________________________________________________________

Title __________________________________________________________________________

Name of Firm ___________________________________________________________________

Address ________________________________________________________________________

 _______________________________________________________________________________
                                                            (Including Zip Code)

(Area Code and Tel No.) ________________________________________________________

Dated:  ____________, 1994


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