DYNAMICS CORP OF AMERICA
SC 14D1/A, 1997-05-27
ELECTRIC HOUSEWARES & FANS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         -------------------------------
                                 SCHEDULE 14D-1
              TENDER OFFER STATEMENT (AMENDMENT NO. 11) PURSUANT TO
             SECTION 14(D)(1) OF THE SECURITIES EXCHANGE ACT OF 1934
                         -------------------------------
                         DYNAMICS CORPORATION OF AMERICA
                            (Name of Subject Company)

                                 WHX CORPORATION
                              SB ACQUISITION CORP.
                                    (Bidders)

                     COMMON STOCK, PAR VALUE $.10 PER SHARE
             (INCLUDING THE ASSOCIATED COMMON STOCK PURCHASE RIGHTS)
                         (Title of Class of Securities)

                                   268039 10 4
                      (CUSIP Number of Class of Securities)

                                MR. RONALD LABOW
                              CHAIRMAN OF THE BOARD
                                 WHX CORPORATION
                              110 EAST 59TH STREET
                               NEW YORK, NY 10022
                            TELEPHONE: (212) 355-5200

            (Name, Address and Telephone Number of Person Authorized
           to Receive Notices and Communications on Behalf of Bidder)
                                 with a copy to:

                               ILAN K. REICH, ESQ.
                     OLSHAN GRUNDMAN FROME & ROSENZWEIG LLP
                                 505 PARK AVENUE
                            NEW YORK, NEW YORK 10022
                            TELEPHONE: (212) 753-7200

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

         This Statement  amends and  supplements  the Tender Offer  Statement on
Schedule 14D-1 filed with the  Securities  and Exchange  Commission on March 31,
1997,  as  previously   amended  and  supplemented,   by  SB  Acquisition  Corp.
("Purchaser"),  a New York  corporation  and a wholly  owned  subsidiary  of WHX
Corporation,  a Delaware corporation ("Parent"),  to purchase any and all shares
of  Common  Stock,  par value  $.10 per share  (the  "Shares")  of the  Company,
including the  associated  Common Stock Purchase  Rights issued  pursuant to the
Rights Agreement, dated as of January 30, 1986, as amended on December 27, 1995,
between the Company and First  National Bank of Boston,  as Rights  Agent,  at a
price of $45 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 31, 1997, as amended and supplemented  from time to time (the "Offer
to Purchase") and in the related  Letters of Transmittal  (which,  together with
any  amendments or supplements  thereto,  including the First  Supplement  dated
April 9, 1997, the Second  Supplement dated April 15, 1997, the Third Supplement
dated April 30, 1997 and the Fourth  Supplement  dated May 27, 1997 (the "Fourth
Supplement"),  constitute the "Offer").  Capitalized  terms used and not defined
herein shall have the  meanings  assigned to such terms in the Offer to Purchase
and the Schedule 14D-1.

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

         Item 3 is hereby amended and  supplemented by reference to Section 3 of
the Fourth Supplement.

ITEM 4.           SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
<PAGE>
         Item 4 is hereby  amended and restated by reference to Section 2 of the
Fourth Supplement.

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

         Item 5 is hereby amended and  supplemented by reference to Section 3 of
the Fourth Supplement.

ITEM 10.          ADDITIONAL INFORMATION.

         Item 10 is hereby amended and supplemented by reference to Section 4 of
the Fourth Supplement.

ITEM 11.          MATERIAL TO BE FILED AS EXHIBITS.

         (a)      (1)      Offer to Purchase, dated March 31, 1997.*
                  (2)      Letter of Transmittal.*
                  (3)      Notice of Guaranteed Delivery.*
                  (4)      Letter to Brokers,  Dealers,  Commercial Banks, Trust
                           Companies and Other Nominees.*
                  (5)      Letter  to  Clients  for  use  by  Brokers,  Dealers,
                           Commercial   Banks,   Trust   Companies   and   Other
                           Nominees.*
                  (6)      Guidelines    for     Certification    of    Taxpayer
                           Identification Number on Substitute Form W-9.*
                  (7)      Text of Press Release,  issued by Parent on March 31,
                           1997.*
                  (8)      Summary Advertisement published on April 1, 1997.*
                  (9)      Text of Press  Release,  issued by Parent on April 9,
                           1997.*
                  (10)     First Supplement to Offer to Purchase, dated April 9,
                           1997.*
                  (11)     Revised Letter of Transmittal* 
                  (12)     Revised Letter to Brokers, Dealers, Commercial Banks,
                           Trust Companies and Other Nominees.*
                  (13)     Revised   Letter  to  Clients  for  use  by  Brokers,
                           Dealers,  Commercial Banks, Trust Companies and Other
                           Nominees.*
                  (14)     Second  Supplement to Offer to Purchase,  dated April
                           15, 1996.*
                  (15)     Revised Letter of Transmittal.*
                  (16)     Revised Letter to Brokers, Dealers, Commercial Banks,
                           Trust Companies and Other Nominees.*
                  (17)     Revised   Letter  to  Clients  for  use  by  Brokers,
                           Dealers,  Commercial Banks, Trust Companies and Other
                           Nominees.*
                  (18)     Revised Notice of Guaranteed Delivery.*
                  (19)     Complaint in DYNAMICS  CORPORATION OF AMERICA vs. WHX
                           CORPORATION  AND SB  ACQUISITION  CORP.  (3:97 CV 702
                           (GLG))  filed in the United  States  District  Court,
                           District of Connecticut, on April 14, 1997.*
                  (20)     Text of Press Release,  issued by Parent on April 29,
                           1997.*
                  (21)     Text of Press Release,  issued by Parent on April 30,
                           1997.*
                  (22)     Third  Supplement  to Offer to Purchase,  dated April
                           30, 1997.*
                  (23)     Text of Press  Release,  issued  by  Parent on May 1,
                           1997.*
                  (24)     Motion to Amend Counterclaims and Proposed Answer and
                           First Amended  Counterclaims in DYNAMICS  CORPORATION
                           OF AMERICA  vs. WHX  CORPORATION  AND SB  ACQUISITION
                           CORP.  (3:97 CV 702 (GLG)) filed in the United States
                           District Court,  District of  Connecticut,  on May 5,
                           1997.*
                  (25)     Notice to the Company  dated May 8, 1997  pursuant to
                           Article  I,  Sections  10  and  11 of  the  Company's
                           By-laws in connection  with the Company's 1997 Annual
                           Meeting of Shareholders.*
                  (26)     Text of Press  Release,  issued  by Parent on May 20,
                           1997.*
                  (27)     Fourth Supplement to Offer to Purchase, dated May 27,
                           1997
                  (28)     Text of Press  Release,  issued  by Parent on May 27,
                           1997. 

- -------- 

  * Previously provided.


                                       -2-
<PAGE>

         (b)      Not applicable.

         (c)      Not applicable.

         (d)      Not applicable.

         (e)      Not applicable.

         (f)      Not applicable.


                                       -3-
<PAGE>
                                    SIGNATURE


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

Dated:  May 27, 1997
                                        WHX CORPORATION


                                        By:/S/ STEWART E. TABIN
                                            -----------------------------
                                            Name:   Stewart E. Tabin
                                            Title:    Assistant Treasurer



                                        SB ACQUISITION CORP.


                                        By: /S/ STEWART E. TABIN
                                            -----------------------------
                                             Name:  Stewart E. Tabin
                                             Title:   Vice President


                                       -4-
<PAGE>
                                  EXHIBIT INDEX


EXHIBIT
NUMBER                                                                      PAGE
- --------------------------------------------------------------------------------

         (a)      (1)      Offer to Purchase, dated March 31, 1997.*
                  (2)      Letter of Transmittal.*
                  (3)      Notice of Guaranteed Delivery.*
                  (4)      Letter to Brokers,  Dealers,  Commercial Banks, Trust
                           Companies and Other Nominees.*
                  (5)      Letter  to  Clients  for  use  by  Brokers,  Dealers,
                           Commercial   Banks,   Trust   Companies   and   Other
                           Nominees.*
                  (6)      Guidelines    for     Certification    of    Taxpayer
                           Identification Number on Substitute Form W-9.*
                  (7)      Text of Press Release,  issued by Parent on March 31,
                           1997.*
                  (8)      Summary Advertisement  published on April 1, 1997.*
                  (9)      Text of Press  Release,  issued by Parent on April 9,
                           1997.*
                  (10)     First Supplement to Offer to Purchase, dated April 9,
                           1997.*
                  (11)     Revised Letter of Transmittal* 
                  (12)     Revised Letter to Brokers, Dealers, Commercial Banks,
                           Trust Companies and Other Nominees.*
                  (13)     Revised   Letter  to  Clients  for  use  by  Brokers,
                           Dealers,  Commercial Banks, Trust Companies and Other
                           Nominees.*
                  (14)     Second  Supplement  to Offer to Purchase  dated April
                           15, 1997.*
                  (15)     Revised Letter of Transmittal.*
                  (16)     Revised Letter to Brokers, Dealers, Commercial Banks,
                           Trust Companies and Other Nominees.*
                  (17)     Revised   Letter  to  Clients  for  use  by  Brokers,
                           Dealers,  Commercial Banks, Trust Companies and Other
                           Nominees.*
                  (18)     Revised Notice of Guaranteed Delivery.*
                  (19)     Complaint in DYNAMICS  CORPORATION OF AMERICA vs. WHX
                           CORPORATION  AND SB  ACQUISITION  CORP.  (3:97 CV 702
                           (GLG))  filed in the United  States  District  Court,
                           District of Connecticut, on April 14, 1997.*
                  (20)     Text of Press Release,  issued by Parent on April 29,
                           1997.*
                  (21)     Text of Press Release,  issued by Parent on April 30,
                           1997.*
                  (22)     Third  Supplement  to Offer to Purchase,  dated April
                           30, 1997.*
                  (23)     Text of Press  Release,  issued  by  Parent on May 1,
                           1997.*
                  (24)     Motion to Amend Counterclaims and Proposed Answer and
                           First Amended  Counterclaims in DYNAMICS  CORPORATION
                           OF AMERICA  vs. WHX  CORPORATION  AND SB  ACQUISITION
                           CORP.  (3:97 CV 702 (GLG)) filed in the United States
                           District Court,  District of  Connecticut,  on May 5,
                           1997.*'
                  (25)     Notice to the Company  dated May 8, 1997  pursuant to
                           Article  I,  Sections  10  and  11 of  the  Company's
                           By-laws in connection  with the Company's 1997 Annual
                           Meeting of Shareholders.*
                  (26)     Text of Press  Release,  issued  by Parent on May 20,
                           1997.*
                  (27)     Fourth Supplement to Offer to Purchase, dated May 27,
                           1997
                  (28)     Text of Press  Release,  issued  by Parent on May 27,
                           1997.

         (b)      Not applicable.

         (c)      Not applicable.

         (d)      Not applicable.

         (e)      Not applicable.

         (f)      Not applicable.
- --------
  * Previously provided.


                                       -5-

                                                                 EXHIBIT (A)(27)
                                                                 ---------------

                     FOURTH SUPPLEMENT, DATED MAY 27, 1997,

                  TO THE OFFER TO PURCHASE DATED MARCH 31, 1997

                              SB ACQUISITION CORP.

                          A WHOLLY OWNED SUBSIDIARY OF

                                 WHX CORPORATION

                OFFERS TO PURCHASE FOR CASH ANY AND ALL SHARES OF

                COMMON STOCK (INCLUDING THE ASSOCIATED RIGHTS) OF

                         DYNAMICS CORPORATION OF AMERICA

                     AT AN INCREASED PRICE OF $56 PER SHARE


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

THE OFFER AND  WITHDRAWAL  RIGHTS WILL EXPIRE AT 12:00  MIDNIGHT,  NEW YORK CITY
TIME, ON FRIDAY,  JUNE 13, 1997, UNLESS THE OFFER IS EXTENDED.  THE OFFER IS NOT
SUBJECT TO ANY MINIMUM NUMBER OF SHARES BEING TENDERED.

THE OFFER IS CONDITIONED  UPON, AMONG OTHER THINGS (1) THE RIGHTS (AS DEFINED IN
THE  OFFER TO  PURCHASE)  HAVING  BEEN  REDEEMED  BY THE BOARD OF  DIRECTORS  OF
DYNAMICS CORPORATION OF AMERICA OR SB ACQUISITION CORP. BEING SATISFIED,  IN ITS
REASONABLE  JUDGMENT,  THAT THE RIGHTS HAVE BEEN  INVALIDATED  OR ARE  OTHERWISE
INAPPLICABLE  TO THE OFFER AND THE MERGER (AS DEFINED IN THE OFFER TO  PURCHASE)
AND (2) SB ACQUISITION CORP. BEING SATISFIED, IN ITS REASONABLE JUDGEMENT,  THAT
THE RESTRICTIONS  CONTAINED IN THE NEW YORK BUSINESS COMBINATION LAW (AS DEFINED
HEREIN) WILL NOT APPLY TO THE  ACQUISITION OF SHARES PURSUANT TO THE OFFER OR TO
THE MERGER.  SEE SECTIONS 13 AND 14 OF THE OFFER TO  PURCHASE.  THE OFFER IS NOT
SUBJECT TO FINANCING.

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

                                    IMPORTANT

         Any  shareholder  desiring  to  tender  all  or  any  portion  of  such
shareholder's Shares (as defined herein) should either (i) complete and sign the
Letter  of  Transmittal  (or  a  facsimile   thereof)  in  accordance  with  the
instructions in the Letter of  Transmittal,  have such  shareholder's  signature
thereon  guaranteed if required by  Instruction 1 to the Letter of  Transmittal,
mail or deliver the Letter of Transmittal  (or such  facsimile  thereof) and any
other required  documents to the Depositary and either deliver the  certificates
for such Shares to the  Depositary  along with the Letter of  Transmittal  (or a
facsimile  thereof)  or  deliver  such  Shares  pursuant  to the  procedure  for
book-entry transfer set forth in Section 3 of the Offer to Purchase prior to the
expiration  of the Offer or (ii)  request  such  shareholder's  broker,  dealer,
commercial  bank,  trust company or other nominee to effect the  transaction for
such shareholder.

         A shareholder having Shares 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 such  shareholder
desires to tender such Shares.  Any shareholder who desires to tender Shares and
whose certificates for such Shares are not immediately available,  or who cannot
comply with the  procedures for  book-entry  transfer  described in the Offer to
Purchase on a timely basis,  may tender such Shares by following the  procedures
for guaranteed delivery set forth in Section 3 of the Offer to Purchase.

         Unless  and until  Purchaser  declares  that the Rights  Condition  (as
defined in the Third Supplement to the Offer to Purchase) is satisfied,  holders
of Shares will be required to tender one Right for each Share  tendered in order
to effect a valid tender of such Share. If the Distribution  Date (as defined in
the Offer to Purchase) does not occur prior to the  Expiration  Date (as defined
herein),  a tender of Shares  will also  constitute  a tender of the  associated
Rights.  If the  Distribution  Date occurs  prior to the  Expiration  Date,  the
procedures  set forth in Section 3 with  respect  to the  separate  delivery  of
certificates evidencing the Rights must be followed to effect a valid tender.

         Questions and requests for assistance or for  additional  copies of the
Offer to Purchase,  the First Supplement thereto, the Second Supplement thereto,
the Third Supplement thereto, this Fourth Supplement thereto, the revised Letter
of  Transmittal  or  other  tender  offer  materials,  may  be  directed  to the
Information  Agent (as  defined in the Offer to  Purchase)  at its  address  and
telephone number set forth on the back cover of this Fourth Supplement.

May 27, 1997
<PAGE>



TO THE HOLDERS OF COMMON STOCK OF DYNAMICS CORPORATION AMERICA:

                                  INTRODUCTION

         The following  information amends and supplements the Offer to Purchase
dated March 31, 1997 (the "Offer to Purchase"),  as amended and  supplemented by
the First Supplement thereto, dated April 10, 1997 (the "First Supplement"), the
Second Supplement thereto,  dated April 15, 1997 (the "Second Supplement"),  the
Third Supplement thereto, dated April 30, 1997 (the "Third Supplement") and this
Fourth Supplement thereto,  dated May 27, 1997 (the "Fourth Supplement"),  of SB
Acquisition  Corp.,  a New York  corporation  ("Purchaser")  and a  wholly-owned
subsidiary of WHX Corporation,  a Delaware  corporation  ("Parent")  pursuant to
which  Purchaser is now offering to purchase any and all shares of common stock,
par value $.10 per share (the "Shares") of Dynamics  Corporation  of America,  a
New York  corporation  (the  "Company"),  including the associated  Common Stock
Purchase Rights issued pursuant to the Rights  Agreement dated as of January 30,
1986,  as amended on December 27, 1995,  between the Company and First  National
Bank of Boston,  as Rights Agent, at a price of $56 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 the Offer to  Purchase,  as amended and
supplemented  by  the  First  Supplement,   the  Second  Supplement,  the  Third
Supplement,  and this Fourth Supplement and in the related Letter of Transmittal
(which, as amended from time to time, together constitute the "Offer").

         Except as otherwise set forth in this Fourth Supplement,  the terms and
conditions previously set forth in the Offer to Purchase,  the First Supplement,
the Second Supplement and the Third Supplement remain applicable in all respects
to the Offer, and this Fourth  Supplement should be read in conjunction with the
Offer to Purchase,  the First  Supplement,  the Second  Supplement and the Third
Supplement. Unless the context requires otherwise, terms not defined herein have
the meanings  ascribed to them in the Offer to Purchase,  the First  Supplement,
the Second Supplement and the Third Supplement.


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

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

         1.       TERMS OF THE OFFER; EXPIRATION DATE.

         The  discussion  set forth in  Section 1 of the  Offer to  Purchase  is
hereby amended and supplemented as follows:

         The price per Share to be paid pursuant to the Offer has been increased
from $45 per Share to $56 per Share, net to the Seller in cash, without interest
thereon. The term "Expiration Date" means 12:00 midnight, New York City time, on
Friday, June 13, 1997, unless and until Purchaser, in its sole discretion, shall
have  extended the period of time during which the Offer is open, in which event
the term "Expiration  Date" shall refer to the latest time and date at which the
Offer, as so extended, by Purchaser shall expire. As of the close of business on
May 23, 1997, there were  approximately  420,000 Shares tendered.  Purchaser had
not accepted for payment or purchased any of such Shares.

         2.       SOURCE AND AMOUNT OF FUNDS.

         The  discussion  set forth in  Section 9 of the  Offer to  Purchase  is
hereby amended and restated as follows:
<PAGE>
         Purchaser estimates that the total amount of funds required to purchase
Shares  pursuant to the Offer and to pay all related  costs and expenses will be
approximately $215 million.  Purchase plans to obtain such funds through capital
contributions  or  advances  made by Parent.  As of March 31,  1997,  Parent had
available over $350 million in cash and cash equivalents.

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

         The  discussion  set forth in  Section 10 of the Offer to  Purchase  is
hereby amended and supplemented as follows:

         On May 11, 1997,  the Company and CTS announced  that they have entered
into a definitive  merger agreement.  Under such agreement,  CTS will commence a
cash  tender  offer for  approximately  50% of the  Shares at a price of $55 per
Share  and the  Shares  that are not  purchased  in such  tender  offer  will be
converted in a merger into 0.88 shares of CTS' common stock.  CTS also announced
that it will declare a 1:1 stock dividend upon completion of such merger. On May
16,  1997,  CTS  commenced a tender  offer to acquire up to 49.9% of the Shares,
subject to a condition that at least 25% of the Shares are validly  tendered and
not withdrawn by the June 13, 1997, expiration date of such offer.

         On May 27,  1997,  Parent  and  Purchaser  issued the  following  press
release:

         New York--May 27,  1997--WHX  Corporation  (NYSE:  WHX) announced today
that its wholly-owned  subsidiary SB Acquisition  Corp. has increased to $56 per
share the price being offered in its current tender offer for any and all shares
of Dynamics  Corporation  of America  (NYSE:DYA).  The expiration and withdrawal
date of the tender have been extended to 12:00 midnight,  Friday, June 13, 1997.
Upon  completion of this tender offer,  WHX would  complete the  acquisition  of
Dynamics  Corp.  through a cash  merger at the same  price.  All other terms and
conditions of the tender offer remain unchanged.

         In announcing this action, Mr. Ron LaBow,  Chairman of WHX, noted: "Our
revised tender offer  presents  Dynamics  Corp.  stockholders  with a compelling
economic  alternative  to CTS  Corporation's  tender  offer  to  acquire  50% of
Dynamics Corp. for cash at $55 per share.  Under the CTS/Dynamics  Corp.  merger
agreement announced earlier this month, the balance of the Dynamics Corp. shares
would be acquired by CTS Corp.  for its common stock several months from now, at
a value which may or may not be  equivalent  to the cash price  currently  being
offered by CTS Corp.  for only  one-half of  Dynamics  Corp.  shares.  Under our
revised  tender  offer,   Dynamics  Corp.   stockholders  are  being  given  the
opportunity  to obtain a higher  cash  price for all of their  shares,  with the
closing to occur on virtually the same timetable as CTS Corp.'s tender offer."

         Mr. LaBow  continued,  "The only  impediment  to the  completion of our
revised tender offer are the conditions that the anti-takeover  devices deployed
by the Board of Directors of Dynamics  Corp. be rescinded,  including the poison
pill plan which it euphemistically  named a "shareholder rights" plan. Under the
CTS/Dynamics Corp. merger agreement, in order to waive its anti-takeover devices
and let  stockholders  actually  have any right to decide for  themselves  which
tender offer is preferable,  the Dynamics  Corp.  Board of Directors must obtain
the consent of CTS Corp.  We find it ironic  that these and other  anti-takeover
devices have been  engineered  since the  commencement  of WHX's tender offer to
preserve managements'  prerogatives and give preference to precisely the kind of
transaction which they were ostensibly  designed to protect against: a two-tier,
coercive tender offer.  We question the rationale for using these  anti-takeover
devices to favor a lower-priced 50% cash deal--which  happens to be supported by
management--to  the detriment of the higher-priced any and all cash tender offer
by WHX."

         Mr. LaBow concluded,  "We urge the Dynamics Corp. Board of Directors to
immediately  rescind its anti- takeover defenses and let the marketplace  decide
on its own which tender offer is superior."

         As of the close of business on Friday, May 23, WHX announced that there
were  approximately  420,000  shares of  Dynamics  Corp.  stock  tendered to the
depositary.


                                       -2-
<PAGE>
         4.       CERTAIN LEGAL MATTERS AND REGULATORY APPROVALS

         Certain  Litigation.  On May 9, 1997,  the  Company  amended  its Right
Agreement to provide that the Board of Directors of the Company shall  determine
the day that a Distribution Date occurs following the first public  announcement
of the  commencement of, or the intent of any person (other than the Company) to
commence a tender or exchange offer for 25% or more of the Shares.

         Parent and Purchaser  intend to seek specific  performance to cause the
Company redeem the Rights under the Rights Agreement.

         5.  MISCELLANEOUS.  Parent  and  Purchaser  have  filed with the SEC an
amendment to the Schedule  14D-1 pursuant to Rule 14d-3 of the General Rules and
Regulations under the Securities  Exchange Act,  furnishing  certain  additional
information with respect to the Offer, and may file further amendments  thereto.
The Schedule  14D-1,  and any amendments  thereto,  including  exhibits,  may be
inspected at, and copies may be obtained  from,  the same places and in the same
manner as set forth in Section 7 of the Offer to Purchase (except that they will
not be available at the regional offices of the SEC).

         Except as modified by this  Fourth  Supplement,  the terms set forth in
the Offer to Purchase,  the First Supplement,  the Second Supplement,  the Third
Supplement  and the related  Letters of  Transmittal  remain  applicable  in all
respects to the Offer and this Fourth  Supplement  should be read in conjunction
with the Offer to Purchase,  the First Supplement,  the Second  Supplement,  the
Third Supplement and the related Letter of Transmittal.

                                        SB ACQUISITION CORP.

May 27, 1997


                                       -3-
<PAGE>


         Manually  executed  facsimile  copies  of the  Letter  of  Transmittal,
properly completed and duly signed, will be accepted. The Letter of Transmittal,
certificates  for the Shares and any other required  documents should be sent by
each  shareholder of the Company or his 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:


                        HARRIS TRUST COMPANY OF NEW YORK


       By Mail:              By Overnight Courier:              By Hand:
  Wall Street Station      77 Water Street, 4th Floor        Receive Window
     P.O. Box 1023            New York, NY 10005      77 Water Street, 5th Floor
New York, NY 10268-1023                                     New York, NY 10005

                           By Facsimile Transmission:
                        (for Eligible Institutions Only)
                             (212) 701-7636 or 7637

                    For Information Telephone (call collect):
                                 (212) 701-7624






         Any questions or requests for  assistance  or additional  copies of the
Offer to  Purchase,  the  Letter of  Transmittal  and the  Notice of  Guaranteed
Delivery may be directed to the Information Agent or the Dealer Manager at their
respective  telephone  numbers and locations  listed below. You may also contact
your  broker,  dealer,  commercial  bank or trust  company or other  nominee for
assistance concerning the Offer.

                     The Information Agent for the Offer is:

                            GEORGESON & COMPANY INC.

                                Wall Street Plaza
                            New York, New York 10005
                            Telephone: (212) 440-9800

                                       or

                         CALL TOLL FREE: (800) 223-2064


                                  [Back Cover]


           Whx Corp. Increases Price To $56 Per Share In Tender Offer
           ----------------------------------------------------------
              For Any And All Shares Of Dynamics Corp. Of America;
              ----------------------------------------------------
                       Urges Board To Rescind Poison Pill
                       ----------------------------------


         New York--May 27,  1997--WHX  Corporation  (NYSE:  WHX) announced today
that its wholly-owned  subsidiary SB Acquisition  Corp. has increased to $56 per
share the price being offered in its current tender offer for any and all shares
of Dynamics  Corporation  of America  (NYSE:DYA).  The expiration and withdrawal
date of the tender have been extended to 12:00 midnight,  Friday, June 13, 1997.
Upon  completion of this tender offer,  WHX would  complete the  acquisition  of
Dynamics  Corp.  through a cash  merger at the same  price.  All other terms and
conditions of the tender offer remain unchanged.

         In announcing this action, Mr. Ron LaBow,  Chairman of WHX, noted: "Our
revised tender offer  presents  Dynamics  Corp.  stockholders  with a compelling
economic  alternative  to CTS  Corporation's  tender  offer  to  acquire  50% of
Dynamics Corp. for cash at $55 per share.  Under the CTS/Dynamics  Corp.  merger
agreement announced earlier this month, the balance of the Dynamics Corp. shares
would be acquired by CTS Corp.  for its common stock several months from now, at
a value which may or may not be  equivalent  to the cash price  currently  being
offered by CTS Corp.  for only  one-half of  Dynamics  Corp.  shares.  Under our
revised  tender  offer,   Dynamics  Corp.   stockholders  are  being  given  the
opportunity  to obtain a higher  cash  price for all of their  shares,  with the
closing to occur on virtually the same timetable as CTS Corp.'s tender offer."

         Mr. LaBow  continued,  "The only  impediment  to the  completion of our
revised tender offer are the conditions that the anti-takeover  devices deployed
by the Board of Directors of Dynamics  Corp. be rescinded,  including the poison
pill plan which it euphemistically  named a "shareholder rights" plan. Under the
CTS/Dynamics Corp. merger agreement, in order to waive its anti-takeover devices
and let  stockholders  actually  have any right to decide for  themselves  which
tender offer is preferable,  the Dynamics  Corp.  Board of Directors must obtain
the consent of CTS Corp.  We find it ironic  that these and other  anti-takeover
devices have been  engineered  since the  commencement  of WHX's tender offer to
preserve managements'  prerogatives and give preference to precisely the kind of
transaction which they were ostensibly  designed to protect against: a two-tier,
coercive tender offer.  We question the rationale for using these  anti-takeover
devices to favor a lower-priced 50% cash deal--which  happens to be supported by
management--to  the detriment of the higher-priced any and all cash tender offer
by WHX."

         Mr. LaBow concluded,  "We urge the Dynamics Corp. Board of Directors to
immediately rescind its anti-takeover defenses and let the marketplace decide on
its own which tender offer is superior."

         As of the close of business on Friday, May 23, WHX announced that there
were  approximately  420,000  shares of  Dynamics  Corp.  stock  tendered to the
depositary.


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