HSB GROUP INC
8-K, 1998-12-03
FIRE, MARINE & CASUALTY INSURANCE
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                       SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549

                                    FORM 8-K

                                 CURRENT REPORT


Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

 Date of Report (Date of earliest event reported)  September 21, 1998

                                 HSB GROUP, INC.
             (Exact name of registrant as specified in its charter)

          Connecticut             001-13135            06-1475343
(State or other jurisdiction    (Commission         (IRS Employer
      of incorporation)         File Number)     Identification No.)

      One State Street, Hartford, Connecticut        06102-5024
     (Address of principal executive offices)       (Zip Code)

 Registrant's telephone number, including area code - (860)722-1866


<PAGE>


     Item 5. Other Events - On September  21, 1998 the Board of Directors of HSB
     Group,  Inc.  (the  "Company")  approved the adoption of a new  shareholder
     rights plan to replace the plan that was set to expire on November 28, 1998
     (the  "Expiration  Date").  The new plan is  substantially  similar  to the
     expiring  plan that was adopted in 1988 and is  designed to deter  coercive
     takeover  tactics and  otherwise  encourage  third  parties  interested  in
     acquiring the Company to negotiate with the Board of Directors.

     Pursuant to the new Rights  Agreement  between  the Company and  BankBoston
     N.A., as rights agent,  (the "Rights  Agreement")  the Board has declared a
     dividend of one right for each share of common stock, without par value, of
     the Company  outstanding  on the Expiration  Date.  Each of the rights will
     permit  shareholders to buy one two-hundredth of a share of preferred stock
     at a price of $ 162. The rights are  generally  not  excercisable  until an
     acquiror obtains a 15 percent or greater ownership in the Company.  In such
     an event,  the rights of shareholders  other than the acquiror will entitle
     the  holder  to  purchase   shares  of  the  Company  (or,   under  certain
     circumstances,  of the  acquiror)  at a 50  percent  discount.  The  Rights
     Agreement  provides  that  Employers  Reinsurance  Corporation  will not be
     deemed  an  acquiror  in the  event of the  conversion  of the  Convertible
     Capital  Securities it holds into common stock of the Company  (which would
     currently   constitute   approximately   15.5  percent  of  the   Company's
     outstanding  shares)  unless  and  until  it  acquires  1  percent  or more
     additional  shares.  The new rights expire in ten years and are  redeemable
     for $.01 prior to the acquisition of 15 percent or more of the common stock
     of the Company.

     The foregoing  description  of the Rights  Agreement does not purport to be
     complete and is qualified  by  reference to the Rights  Agreement  attached
     hereto as an exhibit, which is incorporated herein by reference.


     Item 7. Financial Statements and Exhibits

     (c) Exhibits

     Exhibit No.                Description
     ----------                 -----------
      4                         Rights Agreement dated as of 
                                November 28, 1998 between HSB Group, Inc. and
                                BankBoston, N.A., which includes as Exhibit A 
                                thereto the Form of Rights Certificate.

<PAGE>

                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned, thereunto duly authorized.


                                            HSB GROUP, INC.

     
Dated: December 2, 1998                  /s/ R. Kevin Price
                                             R. Kevin Price
                                             Senior Vice President and
                                             Corporate Secretary




<PAGE>


                                  EXHIBIT INDEX

     Exhibit No.    Description                          Page No.
     ----------     -----------                          --------
        4           Rights Agreement dated as of            5
                    November 28, 1998 between HSB
                    Group, Inc. and  BankBoston, N.A.,
                    which includes as Exhibit A thereto
                    the Form of Rights Certificate.


                                                          Exhibit 4

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


                                 HSB GROUP, INC.

                                       and

                                BANKBOSTON, N.A.,

                                 as Rights Agent


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




                                Rights Agreement

                          Dated as of November 28, 1998




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

<PAGE>
                       

                                TABLE OF CONTENTS
                                -----------------
Section                                                                    Page
- -------
1.       Certain Definitions................................................. 3

2.       Appointment of Rights Agent........................................ 13

3.       Issuance of Rights Certificates.................................... 14

4.       Form of Rights Certificates........................................ 18

5.       Countersignature and Registration...................................20

6.       Transfer, Split Up, Combination and Exchange of Rights
         Certificates; Mutilated, Destroyed, Lost or Stolen 
         Rights Certificates................................................ 22

7.       Exercise of Rights; Purchase Price; Expiration Date of Rights...... 24

8.       Cancellation and Destruction of Rights
         Certificates....................................................... 30

9.       Reservation and Availability of Capital Stock..... ................ 31

10.      Preferred Stock Record Date........................................ 35

11.      Adjustment of Purchase Price, Number and Kind of Shares
         or Number of Rights................................................ 36

12.      Certificate of Adjusted Purchase Price or Number of Shares......... 60

13.      Consolidation, Merger or Sale or Transfer of Assets,
         Cash Flow or Earning Power......................................... 60

14.      Fractional Rights and Fractional Shares............................ 67

15.      Rights of Action................................................... 71

16.      Agreement of Rights Holders........................................ 72

17.      Rights Certificate Holder Not Deemed a Stockholder................. 73

18.      Concerning the Rights Agent........................................ 74

19.      Merger or Consolidation or Change of Name of Rights Agent.......... 76

20.      Duties of Rights Agent............................................. 77

<PAGE>

21.      Change of Rights Agent............................................. 82

22.      Issuance of New Rights Certificates................................ 85

23.      Redemption and Termination......................................... 86

24.      Exchange........................................................... 89

25.      Notice of Certain Events........................................... 92

26.      Notices............................................................ 94

27.      Supplements and Amendments......................................... 96

28.      Successors......................................................... 97

29.      Determinations and Action by the Board, etc........................ 97

30.      Benefits of this Agreement......................................... 99

31.      Severability....................................................... 99

32.      Governing Law..................................................... 100

33.      Counterparts...................................................... 100

34.      Descriptive Headings.............................................. 101

                                  EXHIBITS

Exhibit A --      Form of Rights Certificate



<PAGE>

                                RIGHTS AGREEMENT
                                ----------------

     RIGHTS AGREEMENT, dated as of November 28, 1998 (the "Agreement"),  between
HSB Group,  Inc., a Connecticut  corporation  (the  "Company"),  and BankBoston,
N.A., a national banking association (the "Rights Agent").

                               W I T N E S S E T H
                               - - - - - - - - - -

     WHEREAS, on November 28, 1988, the Board of Directors of The Hartford Steam
Boiler  Inspection  and  Insurance  Company  ("HSB")  authorized  and declared a
dividend  distribution of one right for each share of common stock,  without par
value,  of HSB  outstanding  at the close of  business  on December 8, 1988 (the
"1988 Record Date"),  and authorized the issuance of one right for each share of
common  stock,  without  par value,  of HSB issued  between the 1988 Record Date
(whether originally issued or delivered from the HSB's treasury) and the earlier
of the  Distribution  Date or the Expiration  Date (as such terms are defined in
the Rights  Agreement,  dated as of  November  28,  1988 (the "1988  Agreement")
between  HSB and The  First  National  Bank of  Boston),  each  right  initially
representing  the right to  purchase  one  two-hundredth  of a share of Series A
Junior  Participating  Preferred  Stock of HSB  having  the  rights,  powers and

<PAGE>

Preferences set forth in the Amended and Restated  Certificate of  Incorporation
of HSB,  upon the  terms and  subject  to the  conditions  set forth in the 1988
Agreement (the "1988 Rights");

     WHEREAS,  effective as of June 24, 1997,  HSB  consummated a share exchange
pursuant to which the  Company  was formed as a holding  company for HSB and its
subsidiaries  and whereby the Company,  as  successor  to HSB,  assumed the 1988
Agreement;

     WHEREAS,  on  September  21,  1998,  the Board of  Directors of the Company
determined  it  desirable  and in the  best  interests  of the  Company  and its
stockholders for the Company to extend the benefits of the 1988 Agreement and to
implement such extension by executing this Agreement; and

     WHEREAS,  on September 21, 1998 (the "Rights Dividend  Declaration  Date"),
the Board of  Directors  of the  Company  authorized  and  declared  a  dividend
distribution  of one Right (as  hereinafter  defined)  for each  share of Common
Stock (as  hereinafter  defined)  outstanding  at the close of business upon the
"Final  Expiration  Date" as such term is  defined  in the 1988  Agreement  (the
"Record Date"), and has authorized the issuance of one Right (as such number may
hereinafter be adjusted  pursuant to the

                                       2
<PAGE>

provisions  of  Section  11(p)  hereof)  for each  share of Common  Stock of the
Company issued between the Record Date (whether  originally  issued or delivered
from the Company's treasury) and the Distribution Date (as hereinafter  defined)
each Right initially  representing the right to purchase one  two-hundredth of a
share of  Series A Junior  Participating  Preferred  Stock of the  Company  (the
"Preferred  Stock") having the rights,  powers and  preferences set forth in the
Amended and Restated  Articles of Incorporation  of the Company,  upon the terms
and  subject  to the  conditions  hereinafter  set forth  (the  "Rights");  NOW,
THEREFORE, in consideration of the premises and the mutual agreements herein set
forth, the parties hereby agree as follows:
 
    
     Section  1.  Certain  Definitions.  For  purposes  of this  Agreement,  the
                  ---------------------
following terms have the meanings indicated:

          (a)  "Acquiring  Person" shall mean any Person who or which,  together
     with all Affiliates and Associates of such Person,  shall be the Beneficial
     Owner of 15% or more of the shares of Common  Stock then  outstanding,  but
     shall not include (i) the  Company,  (ii) any  Subsidiary  of the  Company,
     (iii) any employee benefit

                                       3
<PAGE>

     plan of the Company,  or of any Subsidiary of the Company, or any Person or
     entity  organized,  appointed or established by the Company for or pursuant
     to the terms of any such plan,  (iv) any Person who becomes the  Beneficial
     Owner of fifteen  percent  (15%) or more of the shares of Common Stock then
     outstanding  as a result of a  reduction  in the number of shares of Common
     Stock  outstanding  due to the  repurchase of shares of Common Stock by the
     Company unless and until such Person, after becoming aware that such Person
     has become the  Beneficial  Owner of fifteen  percent  (15%) or more of the
     then outstanding shares of Common Stock,  acquires beneficial  ownership of
     additional shares of Common Stock  representing one percent (1%) or more of
     the  shares of Common  Stock  then  outstanding,  (v) ERC Life  Reinsurance
     Corporation and Employers Reinsurance Corporation (collectively,  "ERC") in
     the event of conversion of ERC's Convertible  Capital Securities unless and
     until ERC shall  purchase  or  otherwise  become  the  Beneficial  Owner of
     additional shares of Common Stock  constituting 1% or more of the shares of
     Common Stock then outstanding,  or (vi) any such Person who has reported or
     is required to report such  ownership  (but less than 20%) on Schedule  13G
     under the  Securities and Exchange Act of 1934, as amended and in effect on
     the 

                                       4
<PAGE>

     date of the Agreement (the "Exchange  Act") (or any comparable or successor
     report) or on Schedule  13D under the Exchange  Act (or any  comparable  or
     successor  report)  which  Schedule 13D does not state any  intention to or
     reserve the right to control or influence the management or policies of the
     Company  or  engage  in any of the  actions  specified  in  Item 4 of  such
     schedule  (other than the  disposition of the Common Stock) and,  within 10
     Business Days of being  requested by the Company to advise it regarding the
     same,  certifies to the Company that such Person  acquired shares of Common
     Stock in excess of 14.9% inadvertently or without knowledge of the terms of
     the Rights and who, together with all Affiliates and Associates, thereafter
     does not acquire  additional  shares of Common  Stock while the  Beneficial
     Owner  of 15% or more of the  shares  of  Common  Stock  then  outstanding;
     provided,  however,  that if the Person requested to so certify fails to do
     so within 10 Business  Days,  then such Person  shall  become an  Acquiring
     Person immediately after such 10-Business-Day period.

          (b) "Act" shall mean the Securities Act of 1933.

          (c)  "Affiliate" and  "Associate"  shall have the respective  meanings
     ascribed to such terms in 

                                       5
<PAGE>

     Rule 12b-2 of the General Rules and Regulations under the Exchange Act.
                           
          (d) A Person shall be deemed the  "Beneficial  Owner" of, and shall be
     deemed to "beneficially own," any securities:

               (i) which  such  Person  or any of such  Person's  Affiliates  or
          Associates,  directly or indirectly, has the right to acquire (whether
          such right is  exercisable  immediately  or only after the  passage of
          time) pursuant to any agreement, arrangement or understanding (whether
          or not in writing) or upon the exercise of conversion rights, exchange
          rights, rights, warrants or options, or otherwise;  provided, however,
          that a Person  shall not be deemed  the  "Beneficial  Owner" of, or to
          "beneficially  own," (A) securities  tendered  pursuant to a tender or
          exchange offer made by such Person or any of such Person's  Affiliates
          or Associates until such tendered securities are accepted for purchase
          or exchange,  (B)  securities  issuable upon exercise of Rights at any
          time prior to the  occurrence  of a Triggering  Event (as  hereinafter
          defined),  or (C) securi-

                                       6
<PAGE>

          ties issuable upon exercise of Rights from and after the occurrence of
          a Triggering Event which Rights were acquired by such Person or any of
          such Person's  Affiliates or Associates prior to the Distribution Date
          (as  hereinafter  defined) or  pursuant to Section  3(a) or Section 22
          hereof (the "Original  Rights") or pursuant to Section 11(i) hereof in
          connection  with an  adjustment  made  with  respect  to any  Original
          Rights;

               (ii)  which such  Person or any of such  Person's  Affiliates  or
          Associates,  directly or indirectly,  has the right to vote or dispose
          of or has  "beneficial  ownership" of (as determined  pursuant to Rule
          13d-3 of the General Rules and  Regulations  under the Exchange  Act),
          including  pursuant to any agreement,  arrangement  or  understanding,
          whether or not in writing; provided,  however, that a Person shall not
                                     --------   -------
          be deemed the  "Beneficial  Owner" of, or to  "beneficially  own," any
          security  under this  subparagraph  (ii) as a result of an  agreement,
          arrangement or  understanding to vote such security if such agreement,
          arrangement or

                                       7
<PAGE>

          understanding:  (A) arises  solely  from a  revocable  proxy  given in
          response to a public proxy or consent  solicitation  made pursuant to,
          and in accordance with, the applicable provisions of the General Rules
          and Regulations  under the Exchange Act, (B) is not reportable by such
          Person on Schedule 13D under the Exchange  Act (or any  comparable  or
          successor report, and (C) does not constitute a trust, proxy, power of
          attorney or other device with the purpose or effect of allowing two or
          more  persons,  acting in concert,  to avoid being deemed  "beneficial
          owners" of such  security or otherwise  avoid the status of "Acquiring
          Person"  under  the  terms of this  Agreement  or as part of a plan or
          scheme to evade  the  reporting  requirements  under  Schedule  13D or
          Sections 13(d) or 13(g) of the Exchange Act; or

               (iii) which are beneficially  owned,  directly or indirectly,  by
          any other Person (or any  Affiliate or Associate  thereof)  with which
          such Person (or any of such Person's Affiliates or Associates) has any
          agreement,  arrangement or understanding  (whether or not in 

                                       8
<PAGE>

          writing),  for the  purpose  of  acquiring,  holding,  voting  (except
          pursuant  to  a  revocable  proxy  as  described  in  the  proviso  to
          subparagraph  (ii) of this  paragraph  (d)) or disposing of any voting
          securities  of the Company;  provided,  however,  that nothing in this
          paragraph  (d)  shall  cause  a  Person  engaged  in  business  as  an
          underwriter  of  securities  to be the  "Beneficial  Owner"  of, or to
          "beneficially  own," any  securities  acquired  through such  Person's
          participation  in good faith in a firm commitment  underwriting  until
          the expiration of forty days after the date of such  acquisition,  and
          then only if such  securities  continue  to be owned by such Person at
          such  expiration of forty days.  (e) "Business Day" shall mean any day
          other than a Saturday,  Sunday or a day on which banking  institutions
          in the  Commonwealth of  Massachusetts  are authorized or obligated by
          law or executive order to close.

          (f) "Close of business" on any given date shall mean 5:00 P.M., Boston
     time, on such date; provided,  however, that if such date is not a Business
                         --------   -------    
     Day, 

                                       9
<PAGE>

     it shall mean 5:00 P.M., Boston time, on the next succeeding Business Day.

          (g) "Common Stock" shall mean the common stock,  without par value, of
     the  Company,  except that "Common  Stock" when used with  reference to any
     Person other than the Company  shall mean the capital  stock of such Person
     with the greatest  voting power,  or the equity  securities or other equity
     interest having power to control or direct the management, of such Person.
     
          (h)  "Common  Stock  Equivalents"  shall have the meaning set forth in
     Section 11(a)(iii) hereof.

          (i) "Current Market Price" shall have the meaning set forth in Section
     11(d)(i) hereof.

          (j)  "Current  Value"  shall  have the  meaning  set forth in  Section
     11(a)(iii) hereof.

          (k)  "Distribution  Date"  shall have the meaning set forth in Section
     3(a) hereof.

          (l) "Equivalent  Preferred  Stock" shall have the meaning set forth in
     Section 11(b) hereof.
    
          (m) "Exchange Act" shall mean the Securities and Exchange Act of 1934.

          (n)  "Exchange  Ratio"  shall have the meaning set forth in Section 24
     hereof.

                                       10
<PAGE>

          (o) "Expiration Date" shall have the meaning set forth in Section 7(a)
     hereof.

          (p)  "Final  Expiration  Date"  shall  have the  meaning  set forth in
     Section 7(a) hereof.

          (q) "Person" shall mean any individual, firm, corporation, partnership
     or other entity.

          (r)   "Preferred   Stock"   shall  mean  shares  of  Series  A  Junior
     Participating  Preferred Stock, without par value, of the Company,  and, to
     the  extent  that there are not a  sufficient  number of shares of Series A
     Junior Participating Preferred Stock authorized to permit the full exercise
     of the  Rights,  any  other  series  of  preferred  stock  of  the  Company
     designated for such purpose containing terms  substantially  similar to the
     terms of the Series A Junior Participating Preferred Stock.

          (s)  "Principal  Party"  shall have the  meaning  set forth in Section
     13(b) hereof.

          (t)  "Purchase  Price"  shall  have the  meaning  set forth in Section
     4(a)(ii) hereof.

          (u)  "Qualified  Offer"  shall have the  meaning  set forth in Section
     11(a)(ii) hereof.

          (v) "Record Date" shall have the meaning set forth in the last WHEREAS
     clause at the beginning of this Agreement.

                                       11
<PAGE>

          (w)  "Rights"  shall have the  meaning  set forth in the last  WHEREAS
     clause at the beginning of this Agreement.
                          
          (x)  "Rights  Agent"  shall have the  meaning set forth in the parties
     clause at the beginning of this Agreement.

          (y) "Rights  Certificate"  shall have the meaning set forth in Section
     3(a) hereof.

          (z)  "Rights  Dividend  Declaration  Date"  shall have the meaning set
     forth in the last WHEREAS clause at the beginning of this Agreement.

          (aa)  "Section  11(a)(ii)  Event"  shall mean any event  described  in
     Section 11(a)(ii) hereof.
                    
          (bb) "Section 13 Event" shall mean any event described in clauses (x),
     (y) or (z) of Section 13(a) hereof.

          (cc) "Spread"  shall have the meaning set forth in Section  11(a)(iii)
     hereof.

          (dd)  "Stock  Acquisition  Date"  shall  mean the first date of public
     announcement  (which,  for  purposes  of this  definition,  shall  include,
     without  limitation,  a report filed or amended  pursuant to Section  13(d)
     under the  Exchange  Act) by the  Company or an  Acquiring  Person  

                                       12
<PAGE>

     that an Acquiring Person has become such other than pursuant to a Qualified
     Offer.
                      
          (ee)  "Subsidiary"  shall mean,  with  reference  to any  Person,  any
     corporation of which an amount of voting securities  sufficient to elect at
     least a majority  of the  directors  of such  corporation  is  beneficially
     owned,  directly or indirectly,  by such Person, or otherwise controlled by
     such Person.

          (ff) "Substitution Period" shall have the meaning set forth in Section
     11(a)(iii) hereof.

          (gg)  "Summary of Rights"  shall have the meaning set forth in Section
     3(b) hereof.

          (hh)  "Trading  Day"  shall  have the  meaning  set  forth in  Section
     11(d)(i) hereof.

          (ii) "Triggering  Event" shall mean any Section 11(a)(ii) Event or any
     Section 13 Event.


     Section 2.  Appointment of Rights Agent.  The Company  hereby  appoints the
                 ---------------------------
Rights Agent to act as agent for the Company and the holders of the Rights (who,
in accordance with Section 3 hereof,  shall prior to the Distribution  Date also
be the holders of the Common Stock) in accordance  with the terms and conditions
hereof,  and the Rights Agent hereby accepts such  appointment.  The Company may
from time to time  appoint  such  co-rights  

                                       13
<PAGE>

agents as it may deem necessary or desirable,  upon ten (10) days' prior written
notice to the Rights  Agent.  The Rights Agent shall have no duty to  supervise,
and shall in no event be liable for, the acts or omissions of any such co-Rights
Agent.


     Section 3. Issuance of Rights Certificates.
                --------------------------------    

          (a)  Until  the  earlier  of (i) the  close of  business  on the tenth
     Business Day after the Stock  Acquisition  Date (or, if the tenth  Business
     Day after the Stock  Acquisition  Date occurs  before the Record Date,  the
     close of business on the Record Date), or (ii) the close of business on the
     tenth Business Day (or such later date as the Board shall  determine) after
     the date that a tender or  exchange  offer by any  Person  (other  than the
     Company,  any Subsidiary of the Company,  any employee  benefit plan of the
     Company  or of any  Subsidiary  of the  Company,  or any  Person  or entity
     organized,  appointed or  established by the Company for or pursuant to the
     terms of any such  plan) is first  published  or sent or given  within  the
     meaning of Rule  14d-2(a) of the General  Rules and  Regulations  under the
     Exchange  Act, if upon  consummation  thereof,  such Person would become an
     Acquiring  Person,  in either  instance  other than pursuant to a Qualified
     Offer(the  earlier  of  (i)  and  (ii)  being  herein  

                                       14
<PAGE>

     referred to as the "Distribution  Date"),  (x) the Rights will be evidenced
     (subject  to the  provisions  of  paragraph  (b) of this  Section 3) by the
     certificates for the Common Stock registered in the names of the holders of
     the Common Stock (which  certificates for Common Stock shall be deemed also
     to be certificates  for Rights) and not by separate  certificates,  and (y)
     the Rights will be transferable only in connection with the transfer of the
     underlying shares of Common Stock (including a transfer to the Company). As
     soon as practicable after the Distribution Date, the Rights Agent will send
     by first-class, insured, postage-prepaid mail, to each record holder of the
     Common Stock as of the close of business on the  Distribution  Date, at the
     address of such  holder  shown on the records of the  Company,  one or more
     right  certificates,  in  substantially  the form of Exhibit B hereto  (the
     "Rights Certificates"), evidencing one Right for each share of Common Stock
     so held,  subject to  adjustment as provided  herein.  In the event that an
     adjustment  in the number of Rights per share of Common Stock has been made
     pursuant to Section 11(p) hereof, at the time of distribution of the Rights
     Certificates, the Company shall make the necessary and appropriate rounding
     adjustments  (in  accordance  with  Section  14(a)  hereof) so 

                                       15
<PAGE>

     that  Rights  Certificates  representing  only whole  numbers of Rights are
     distributed  and cash is paid in lieu of any fractional  Rights.  As of and
     after the  Distribution  Date, the Rights will be evidenced  solely by such
     Rights Certificates.

          (b) The  Company  will make  available,  as  promptly  as  practicable
     following  the Record Date, a copy of a Summary of Rights (the  "Summary of
     Rights") to any holder Rights who may so request from time to time prior to
     the  Expiration  Date.  With respect to  certificates  for the Common Stock
     outstanding as of the Record Date, until the Distribution  Date, the Rights
     will  be  evidenced  by such  certificates  for the  Common  Stock  and the
     registered holders of the Common Stock shall also be the registered holders
     of the associated Rights. Until the earlier of the Distribution Date or the
     Expiration  Date (as such term is  defined  in Section  7(a)  hereof),  the
     transfer of any certificates representing shares of Common Stock in respect
     of which Rights have been issued shall also  constitute the transfer of the
     Rights associated with such shares of Common Stock.

          (c) Rights  shall be issued in  respect of all shares of Common  Stock
     which are issued (whether originally issued or from the Company's treasury)
     after 

                                       16
<PAGE>

     the Record  Date but prior to the earlier of the  Distribution  Date or the
     Expiration  Date.  Certificates  representing  such shares of Common  Stock
     shall  also be deemed to be  certificates  for  Rights,  and shall bear the
     following legend:

               This certificate also evidences and entitles the holder hereof to
          certain Rights as set forth in the Rights Agreement between HSB Group,
          Inc.  (the  "Company")  and the Rights Agent  thereunder  (the "Rights
          Agreement"),  the terms of which  are  hereby  incorporated  herein by
          reference and a copy of which is on file at the  principal  offices of
          the Company. Under certain  circumstances,  as set forth in the Rights
          Agreement,  such Rights will be evidenced by separate certificates and
          will no longer be evidenced by this certificate. The Company will mail
          to the holder of this certificate a copy of the Rights  Agreement,  as
          in effect  on the date of  mailing,  without  charge,  promptly  after
          receipt of a written request therefor. Under certain circumstances set
          forth in the  Rights  Agreement,  Rights  issued  to, or held by,  any
          Person who is, was or becomes an Acquiring  Person or any Affiliate or
          Associate thereof (as such terms are defined in the Rights Agreement),
          whether  currently  held  by or on  behalf  of such  Person  or by any
          subsequent holder, may become null and void.

With respect to such  certificates  containing the foregoing  legend,  until the
earlier of (i) the  Distribution  Date or (ii) the  Expiration  Date, the Rights
associated  with the Common  Stock  represented  by such  certificates  shall be
evidenced  by such  certificates  alone and  registered  holders of Common Stock
shall also be the regis-

                                       17
<PAGE>

tered  holders  of the  associated  Rights,  and  the  transfer  of any of  such
certificates  shall also  constitute the transfer of the Rights  associated with
the Common Stock represented by such certificates.


     Section 4. Form of Rights Certificates.
                ---------------------------

          (a) The Rights Certificates (and the forms of election to purchase and
     of  assignment  to be  printed  on  the  reverse  thereof)  shall  each  be
     substantially  in the form set forth in  Exhibit A hereto and may have such
     marks of  identification  or  designation  and such  legends,  summaries or
     endorsements printed thereon as the Company may deem appropriate and as are
     not  inconsistent  with  the  provisions  of this  Agreement,  or as may be
     required to comply with any  applicable  law or with any rule or regulation
     made pursuant  thereto or with any rule or regulation of any stock exchange
     on which the  Rights  may from time to time be  listed,  or to  conform  to
     usage.  Subject to the provisions of Section 11 and Section 22 hereof,  the
     Rights Certificates,  whenever distributed, shall be dated as of the Record
     Date and on their face shall  entitle the holders  thereof to purchase such
     number of one  two-hundredths of a share of Preferred Stock as shall be set
     forth therein at the price set forth therein (such  exercise  price per one
     two-hundredth of a share, 

                                       18
<PAGE>

     the "Purchase  Price"),  but the amount and type of securities  purchasable
     upon the exercise of each Right and the  Purchase  Price  thereof  shall be
     subject to adjustment as provided herein.

          (b) Any Rights  Certificate  issued pursuant to Section 3(a),  Section
     11(i) or Section 22 hereof that represents  Rights  beneficially  owned by:
     (i) an  Acquiring  Person or any  Associate  or  Affiliate  of an Acquiring
     Person,  (ii) a transferee of an Acquiring Person (or of any such Associate
     or Affiliate) who becomes a transferee  after the Acquiring  Person becomes
     such,  or  (iii)  a  transferee  of an  Acquiring  Person  (or of any  such
     Associate or Affiliate) who becomes a transferee  prior to or  concurrently
     with the Acquiring  Person  becoming such and receives such Rights pursuant
     to  either  (A) a  transfer  (whether  or not for  consideration)  from the
     Acquiring Person to holders of equity interests in such Acquiring Person or
     to any Person with whom such Acquiring Person has any continuing agreement,
     arrangement  or  understanding  regarding the  transferred  Rights or (B) a
     transfer which the Board of Directors of the Company has determined is part
     of a plan,  arrangement or understanding  which has as a primary purpose or
     effect avoidance of Section 7(e) hereof,  and any Rights Certificate issued

                                       19
<PAGE>
     
     pursuant  to  Section 6 or  Section  11  hereof  upon  transfer,  exchange,
     replacement  or adjustment of any other Rights  Certificate  referred to in
     this sentence, shall contain (to the extent feasible) the following legend:

          The  Rights  represented  by  this  Rights  Certificate  are  or  were
          beneficially  owned by a Person who was or became an Acquiring  Person
          or an Affiliate or Associate of an Acquiring Person (as such terms are
          defined in the Rights Agreement). Accordingly, this Rights Certificate
          and the Rights  represented  hereby  may  become  null and void in the
          circumstances specified in Section 7(e) of the Rights Agreement.

 
    Section 5. Countersignature and Registration.
                ---------------------------------

          (a) The Rights Certificates shall be executed on behalf of the Company
     by its Chairman of the Board,  its President or any Vice President,  either
     manually or by  facsimile  signature,  and shall have  affixed  thereto the
     Company's  seal or a  facsimile  thereof  which  shall be  attested  by the
     Corporate  Secretary  or an Assistant  Corporate  Secretary of the Company,
     either manually or by facsimile signature. The Rights Certificates shall be
     countersigned  by  the  Rights  Agent,  either  manually  or  by  facsimile
     signature,  and shall not be valid for any purpose unless so countersigned.
     In case any  officer of the Company who shall have signed any of the Rights
     Certificates  shall  cease  to  be  such  officer  of  the  Company  before
     countersignature  by the Rights  Agent and  issu-

                                       20
<PAGE>

     ance and delivery by the Company,  such Rights Certificates,  nevertheless,
     may be  countersigned  by the Rights Agent and issued and  delivered by the
     Company with the same force and effect as though the person who signed such
     Rights  Certificates had not ceased to be such officer of the Company;  and
     any  Rights  Certificates  may be signed on  behalf of the  Company  by any
     person who, at the actual date of the execution of such Rights Certificate,
     shall be a proper  officer of the Company to sign such Rights  Certificate,
     although at the date of the  execution  of this Rights  Agreement  any such
     person was not such an officer.
                 
          (b) Following the  Distribution  Date,  the Rights Agent will keep, or
     cause to be kept,  at its  principal  office or offices  designated  as the
     appropriate  place for  surrender of Rights  Certificates  upon exercise or
     transfer,  books for registration  and transfer of the Rights  Certificates
     issued  hereunder.  Such books  shall show the names and  addresses  of the
     respective  holders  of the  Rights  Certificates,  the  number  of  Rights
     evidenced  on its face by each of the Rights  Certificates  and the date of
     each of the Rights Certificates.

                                       21
<PAGE>

     
     Section  6.  Transfer,   Split-Up,   Combination  and  Exchange  of  Rights
                  --------------------------------------------------------------
Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates.
- ----------------------------------------------------------------------

          (a)  Subject to the  provisions  of  Section  4(b),  Section  7(e) and
     Section  14  hereof,  at any  time  after  the  close  of  business  on the
     Distribution  Date,  and  at or  prior  to the  close  of  business  on the
     Expiration Date, any Rights Certificate or Certificates  (other than Rights
     Certificates  representing  Rights that may have been exchanged pursuant to
     Section 24 hereof) may be transferred,  split up, combined or exchanged for
     another Rights Certificate or Certificates, entitling the registered holder
     to purchase a like  number of one  two-hundredths  of a share of  Preferred
     Stock (or,  following a Triggering Event,  Common Stock,  other securities,
     cash or other  assets,  as the case may be) as the  Rights  Certificate  or
     Certificates surrendered then entitles such holder (or former holder in the
     case  of a  transfer)  to  purchase.  Any  registered  holder  desiring  to
     transfer,   split  up,  combine  or  exchange  any  Rights  Certificate  or
     Certificates  shall make such  request in writing  delivered  to the Rights
     Agent,  and shall  surrender the Rights  Certificate or  Certificates to be
     transferred,  split up,  combined or exchanged at the  principal  office or
     offices 

                                       22
<PAGE>

     of the Rights Agent  designated for such purpose.  Neither the Rights Agent
     nor the  Company  shall be  obligated  to take any action  whatsoever  with
     respect to the transfer of any such surrendered  Rights  Certificate  until
     the  registered  holder  shall have  completed  and signed the  certificate
     contained  in the form of  assignment  on the  reverse  side of such Rights
     Certificate  and  shall  have  provided  such  additional  evidence  of the
     identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates
     or Associates  thereof as the Company shall reasonably  request.  Thereupon
     the Rights Agent shall,  subject to Section 4(b),  Section 7(e), Section 14
     hereof  and  Section  24  hereof,  countersign  and  deliver  to the Person
     entitled thereto a Rights Certificate or Rights  Certificates,  as the case
     may  be,  as  so  requested.  The  Company  may  require  payment  of a sum
     sufficient to cover any tax or  governmental  charge that may be imposed in
     connection with any transfer,  split up,  combination or exchange of Rights
     Certificates.

          (b) Upon  receipt  by the  Company  and the Rights  Agent of  evidence
     reasonably  satisfactory  to  them  of  the  loss,  theft,  destruction  or
     mutilation  of a  Rights  Certificate,  and,  in case  of  loss,  theft  or
     destruction,  of indemnity or security reasonably satisfactory to them, 

                                       23
<PAGE>

     and  reimbursement  to the Company and the Rights  Agent of all  reasonable
     expenses  incidental  thereto,  and upon  surrender to the Rights Agent and
     cancellation  of the Rights  Certificate  if  mutilated,  the Company  will
     execute  and deliver a new Rights  Certificate  of like tenor to the Rights
     Agent for  countersignature and delivery to the registered owner in lieu of
     the Rights Certificate so lost, stolen, destroyed or mutilated.


     Section 7. Exercise of Rights; Purchase Price; Expiration Date of Rights.
                -------------------------------------------------------------

          (a) Subject to Section 7(e) hereof, at any time after the Distribution
     Date the  registered  holder of any Rights  Certificate  may  exercise  the
     Rights evidenced  thereby (except as otherwise  provided herein  including,
     without limitation, the restrictions on exercisability set forth in Section
     9(c), Section 11(a)(iii) and Section 23(a) hereof) in whole or in part upon
     surrender of the Rights Certificate,  with the form of election to purchase
     and the  certificate  on the reverse  side thereof  duly  executed,  to the
     Rights  Agent at the  principal  office  or  offices  of the  Rights  Agent
     designated  for  such  purpose,  together  with  payment  of the  aggregate
     Purchase Price with respect to the total number of one  two-hundredths of a
     share (or other securities, 

                                       24
<PAGE>

     cash or other  assets,  as the case  may be) as to which  such  surrendered
     Rights are then  exercisable,  at or prior to the earlier of (i) 5:00 P.M.,
     Boston time, on November 28, 2008, or such later date as may be established
     by the Board of Directors prior to the expiration of the Rights (such date,
     as it may be extended by the Board, the ("Final  Expiration Date"), or (ii)
     the time at which the Rights are  redeemed  or  exchanged  as  provided  in
     Section 23 and Section 24 hereof (the  earlier of (i) and (ii) being herein
     referred to as the "Expiration Date").

          (b) The  Purchase  Price  for  each  one  two-hundredth  of a share of
     Preferred  Stock  pursuant to the  exercise of a Right shall  initially  be
     $162.00,  and shall be subject to adjustment  from time to time as provided
     in Section 11 and Section  13(a) hereof and shall be payable in  accordance
     with paragraph (c) below.

          (c) Upon  receipt  of a Rights  Certificate  representing  exercisable
     Rights,  with the form of  election to purchase  and the  certificate  duly
     executed,  accompanied by payment, with respect to each Right so exercised,
     of the Purchase Price per one  two-hundredth  of a share of Preferred Stock
     (or other shares, securities,  cash or other assets, as the case may be) to
     be  purchased  as set forth  below and an  amount  equal to any  applicable

                                       25
<PAGE>
     
     transfer  tax,  the Rights Agent shall,  subject to Section  20(k)  hereof,
     thereupon  promptly  (i) (A)  requisition  from any  transfer  agent of the
     shares of Preferred  Stock (or make  available,  if the Rights Agent is the
     transfer  agent for such shares)  certificates  for the total number of one
     two-hundredths  of a share  of  Preferred  Stock  to be  purchased  and the
     Company hereby irrevocably authorizes its transfer agent to comply with all
     such  requests,  or (B) if the  Company  shall have  elected to deposit the
     total number of shares of Preferred  Stock  issuable  upon  exercise of the
     Rights hereunder with a depositary  agent,  requisition from the depositary
     agent depositary receipts representing such number of one two-hundredths of
     a  share  of  Preferred  Stock  as  are  to be  purchased  (in  which  case
     certificates for the shares of Preferred Stock represented by such receipts
     shall be deposited by the transfer agent with the depositary agent) and the
     Company will direct the depositary agent to comply with such request,  (ii)
     requisition from the Company the amount of cash, if any, to be paid in lieu
     of  fractional  shares in  accordance  with Section 14 hereof,  (iii) after
     receipt of such certificates or depositary  receipts,  cause the same to be
     delivered  to or,  upon the order of the  registered  holder of such Rights
     Certificate,  registered in such name or 

                                       26
<PAGE>

     names as may be designated by such holder,  and (iv) after receipt thereof,
     deliver such cash, if any, to or upon the order of the registered holder of
     such Rights Certificate.  The payment of the Purchase Price (as such amount
     may be reduced pursuant to Section 11(a)(iii) hereof) shall be made in cash
     or by  certified  bank  check or bank  draft  payable  to the  order of the
     Company or shares of Common Stock  (having a value  determined  pursuant to
     Section 11(a)(iii)  hereof).  In the event that the Company is obligated to
     issue other securities  (including  Common Stock) of the Company,  pay cash
     and/or  distribute  other  property  pursuant to Section 11(a) hereof,  the
     Company will make all arrangements necessary so that such other securities,
     cash and/or other  property are  available for  distribution  by the Rights
     Agent, if and when  appropriate.  The Company reserves the right to require
     prior to the  occurrence of a Triggering  Event that,  upon any exercise of
     Rights,  a number of  Rights be  exercised  so that  only  whole  shares of
     Preferred Stock would be issued.

          (d) In case the  registered  holder of any  Rights  Certificate  shall
     exercise  less  than  all  the  Rights  evidenced  thereby,  a  new  Rights
     Certificate   evidencing   Rights   equivalent  to  the  Rights   remaining
     unexer-

                                       27
<PAGE>

     cised  shall be issued by the Rights  Agent and  delivered  to, or upon the
     order of, the registered holder of such Rights  Certificate,  registered in
     such name or names as may be  designated  by such  holder,  subject  to the
     provisions of Section 14 hereof.

          (e) Notwithstanding  anything in this Agreement to the contrary,  from
     and after the first  occurrence of a Section  11(a)(ii)  Event,  any Rights
     beneficially  owned by (i) an Acquiring Person or an Associate or Affiliate
     of an Acquiring Person, (ii) a transferee of an Acquiring Person (or of any
     such Associate or Affiliate)  who becomes a transferee  after the Acquiring
     Person  becomes such,  or (iii) a transferee of an Acquiring  Person (or of
     any such  Associate  or  Affiliate)  who becomes a  transferee  prior to or
     concurrently  with the  Acquiring  Person  becoming  such and receives such
     Rights pursuant to either (A) a transfer (whether or not for consideration)
     from the Acquiring  Person to holders of equity interests in such Acquiring
     Person or to any Person with whom the Acquiring  Person has any  continuing
     agreement, arrangement or understanding regarding the transferred Rights or
     (B) a transfer  which the Board of Directors of the Company has  determined
     is part of a plan,  arrangement  or  understanding  which  has as a primary

                                       28
<PAGE>
     
     purpose or effect the avoidance of this Section 7(e), shall become null and
     void without any further action and no holder of such Rights shall have any
     rights whatsoever with respect to such Rights,  whether under any provision
     of this  Agreement  or  otherwise.  The  Company  shall use all  reasonable
     efforts to insure that the provisions of this Section 7(e) and Section 4(b)
     hereof are  complied  with,  but shall have no  liability  to any holder of
     Rights  Certificates or any other Person as a result of its failure to make
     any  determinations  with respect to an Acquiring Person or its Affiliates,
     Associates or transferees hereunder.

          (f)  Notwithstanding  anything  in  this  Agreement  to the  contrary,
     neither the Rights  Agent nor the Company  shall be  obligated to undertake
     any action with respect to a registered  holder upon the  occurrence of any
     purported  exercise as set forth in this  Section 7 unless such  registered
     holder shall have (i) completed and signed the certificate contained in the
     form of election to  purchase  set forth on the reverse  side of the Rights
     Certificate   surrendered  for  such  exercise,   and  (ii)  provided  such
     additional  evidence  of the  identity of the  Beneficial  Owner (or 

                                       29
<PAGE>

     former Beneficial Owner) or Affiliates or Associates thereof as the Company
     shall reasonably request.
               

     Section 8. Cancellation and Destruction of Rights Certificates.  All Rights
                ---------------------------------------------------
Certificates  surrendered  for the  purpose  of  exercise,  transfer,  split-up,
combination  or  exchange  shall,  if  surrendered  to the Company or any of its
agents,  be delivered to the Rights Agent for cancellation or in cancelled form,
or, if surrendered to the Rights Agent,  shall be cancelled by it, and no Rights
Certificates  shall be issued in lieu thereof  except as expressly  permitted by
any of the provisions of this Agreement. The Company shall deliver to the Rights
Agent for cancellation and retirement,  and the Rights Agent shall so cancel and
retire,  any other  Rights  Certificate  purchased  or  acquired  by the Company
otherwise  than upon the exercise  thereof.  The Rights Agent shall  deliver all
cancelled Rights  Certificates to the Company,  or shall, at the written request
of the Company,  destroy such cancelled  Rights  Certificates,  and in such case
shall deliver a certificate of destruction thereof to the Company.

                                       30
<PAGE>


     Section 9. Reservation and Availability of Capital Stock.
                ---------------------------------------------

          (a) The Company covenants and agrees that it will cause to be reserved
     and kept available out of its  authorized and unissued  shares of Preferred
     Stock (and,  following  the  occurrence of a Triggering  Event,  out of its
     authorized and unissued  shares of Common Stock and/or other  securities or
     out of its authorized  and issued shares held in its treasury),  the number
     of shares of Preferred Stock (and, following the occurrence of a Triggering
     Event,  Common  Stock and/or other  securities)  that,  as provided in this
     Agreement including Section 11(a)(iii) hereof, will be sufficient to permit
     the exercise in full of all outstanding Rights.

          (b) So long as the  shares of  Preferred  Stock  (and,  following  the
     occurrence  of a Triggering  Event,  Common Stock and/or other  securities)
     issuable and  deliverable  upon the exercise of the Rights may be listed on
     any national securities exchange, the Company shall use its best efforts to
     cause,  from and after  such time as the  Rights  become  exercisable,  all
     shares  reserved  for such  issuance  to be  listed on such  exchange  upon
     official notice of issuance upon such exercise.

                                       31
<PAGE>

          (c) The  Company  shall use its best  efforts to (i) file,  as soon as
     practicable  following  the earliest  date after the first  occurrence of a
     Section  11(a)(ii) Event on which the  consideration to be delivered by the
     Company upon exercise of the Rights has been  determined in accordance with
     Section  11(a)(iii)  hereof,  a registration  statement under the Act, with
     respect to the  securities  purchasable  upon  exercise of the Rights on an
     appropriate  form,  (ii)  cause  such  registration   statement  to  become
     effective as soon as  practicable  after such filing,  and (iii) cause such
     registration  statement to remain effective (with a prospectus at all times
     meeting the  requirements  of the Act) until the earlier of (A) the date as
     of which the Rights are no longer exercisable for such securities,  and (B)
     the date of the  expiration of the Rights.  The Company will also take such
     action as may be  appropriate  under,  or to ensure  compliance  with,  the
     securities or "blue sky" laws of the various states in connection  with the
     exercisability of the Rights.  The Company may temporarily  suspend,  for a
     period of time not to exceed  ninety  (90) days after the date set forth in
     clause (i) of the first sentence of this Section 9(c),  the  exercisability
     of the Rights in order to prepare and file such registration  statement and

                                       32
<PAGE>
   
     permit it to become effective. Upon any such suspension,  the Company shall
     issue a public  announcement  stating that the exercisability of the Rights
     has been temporarily  suspended,  as well as a public  announcement at such
     time as the  suspension  has been  rescinded.  In addition,  if the Company
     shall  determine  that a registration  statement is required  following the
     Distribution  Date, the Company may temporarily  suspend the exercisability
     of the Rights until such time as a registration statement has been declared
     effective. Notwithstanding any provision of this Agreement to the contrary,
     the Rights shall not be  exercisable in any  jurisdiction  if the requisite
     qualification  in such  jurisdiction  shall  not have  been  obtained,  the
     exercise  thereof  shall  not  be  permitted  under  applicable  law,  or a
     registration statement shall not have been declared effective.

          (d) The Company covenants and agrees that it will take all such action
     as may be  necessary  to ensure that all one  two-hundredths  of a share of
     Preferred  Stock (and,  following  the  occurrence  of a Triggering  Event,
     Common Stock and/or other  securities)  delivered  upon  exercise of Rights
     shall, at the time of delivery of the certificates for such shares (subject
     to 

                                       33
<PAGE>

     payment of the Purchase Price),  be duly and validly  authorized and issued
     and fully paid and nonassessable.

          (e) The Company further covenants and agrees that it will pay when due
     and payable any and all federal and state  transfer taxes and charges which
     may be  payable  in  respect  of the  issuance  or  delivery  of the Rights
     Certificates and of any certificates for a number of one  two-hundredths of
     a share of Preferred Stock (or Common Stock and/or other securities, as the
     case may be) upon the exercise of Rights.  The Company shall not,  however,
     be required to pay any  transfer tax which may be payable in respect of any
     transfer or delivery of Rights  Certificates to a Person other than, or the
     issuance  or  delivery  of a  number  of one  two-hundredths  of a share of
     Preferred Stock (or Common Stock and/or other  securities,  as the case may
     be) in respect of a name  other than that of the  registered  holder of the
     Rights Certificates  evidencing Rights surrendered for exercise or to issue
     or deliver any certificates for a number of one  two-hundredths  of a share
     of Preferred  Stock (or Common Stock and/or other  securities,  as the case
     may  be) in a name  other  than  that of the  registered  holder  upon  the
     exercise  of any  Rights  until such tax shall have been paid (any such tax
     being  payable  by the  holder of such  Rights  

                                       34
<PAGE>

     Certificate  at the time of surrender) or until it has been  established to
     the Company's satisfaction that no such tax is due.


     Section 10.  Preferred  Stock  Record  Date.  Each person in whose name any
                  ------------------------------
certificate for a number of one two-hundredths of a share of Preferred Stock (or
Common  Stock and/or  other  securities,  as the case may be) is issued upon the
exercise of Rights shall for all purposes be deemed to have become the holder of
record of such  fractional  shares of  Preferred  Stock (or Common  Stock and/or
other  securities,  as the  case  may  be)  represented  thereby  on,  and  such
certificate  shall  be  dated,  the  date  upon  which  the  Rights  Certificate
evidencing  such Rights was duly  surrendered  and payment of the Purchase Price
(and all applicable  transfer taxes) was made;  provided,  however,  that if the
                                                --------   -------
date of such surrender and payment is a date upon which the Preferred  Stock (or
Common Stock and/or other securities,  as the case may be) transfer books of the
Company are closed, such Person shall be deemed to have become the record holder
of such shares  (fractional  or  otherwise)  on, and such  certificate  shall be
dated, the next succeeding  Business Day on which the Preferred Stock (or Common
Stock and/or other securities, as the case may be) transfer books of the Company
are

                                       35
<PAGE>

open.  Prior to the exercise of the Rights  evidenced  thereby,  the holder of a
Rights  Certificate  shall not be entitled to any rights of a stockholder of the
Company  with  respect  to shares  for which the  Rights  shall be  exercisable,
including,  without limitation, the right to vote, to receive dividends or other
distributions or to exercise any preemptive rights, and shall not be entitled to
receive any notice of any proceedings of the Company, except as provided herein.


     Section  11.  Adjustment  of Purchase  Price,  Number and Kind of Shares or
                   -------------------------------------------------------------
Number of Rights.  The Purchase Price,  the number and kind of shares covered by
- ----------------
each Right and the number of Rights  outstanding  are subject to adjustment from
time to time as provided in this Section 11.

          (a)(i) In the event the  Company  shall at any time  after the date of
     this  Agreement  (A) declare a dividend on the  Preferred  Stock payable in
     shares of Preferred Stock,  (B) subdivide the outstanding  Preferred Stock,
     (C)  combine  the  outstanding  Preferred  Stock  into a smaller  number of
     shares, or (D) issue any shares of its capital stock in a  reclassification
     of the Preferred Stock (including any such  

                                       36
<PAGE>

     reclassification  in connection with a consolidation or merger in which the
     Company is the  continuing or surviving  corporation),  except as otherwise
     provided in this Section 11(a) and Section 7(e) hereof,  the Purchase Price
     in  effect  at the time of the  record  date for  such  dividend  or of the
     effective date of such subdivision,  combination or  reclassification,  and
     the number and kind of shares of Preferred  Stock or capital stock,  as the
     case may be, issuable on such date,  shall be  proportionately  adjusted so
     that the holder of any Right exercised after such time shall be entitled to
     receive,  upon payment of the Purchase Price then in effect,  the aggregate
     number and kind of shares of Preferred  Stock or capital stock, as the case
     may be, which, if such Right had been exercised  immediately  prior to such
     date and at a time when the Preferred  Stock  transfer books of the Company
     were  open,  such  holder  would have  owned  upon such  exercise  and been
     entitled to receive by virtue of such dividend, subdivision, combination or
     reclassification.  If an event  occurs  which would  require an  ad-

                                       37
<PAGE>

     justment under both this Section 11(a)(i) and Section 11(a)(ii) hereof, the
     adjustment  provided for in this Section  11(a)(i) shall be in addition to,
     and shall be made prior to, any  adjustment  required  pursuant  to Section
     11(a)(ii) hereof.

               (ii) In the event any Person shall,  at any time after the Rights
          Dividend  Declaration  Date,  become an Acquiring  Person,  unless the
          event  causing  such  Person  to  become  an  Acquiring  Person  is  a
          transaction set forth in Section 13(a) hereof, or is an acquisition of
          shares of Common Stock pursuant to a tender offer or an exchange offer
          for all  outstanding  shares of  Common  Stock at a price and on terms
          determined  by at least a  majority  of the  members  of the  Board of
          Directors  who  are  not  officers  of the  Company  and  who  are not
          representatives,  nominees,  Affiliates  or Associates of an Acquiring
          Person,  after receiving  advice from one or more  investment  banking
          firms,  to be (a) at a price  which  is fair to  stockholders  and not
          inadequate  (taking into account all factors which such members of the
          Board deem 

                                       38
<PAGE>

          relevant, including, without limitation, prices which could reasonably
          be achieved if the Company or its assets were sold on an orderly basis
          designed  to  realize  maximum  value) and (b)  otherwise  in the best
          interests of the Company and its stockholders (a "Qualified Offer")

then, promptly following the occurrence of such event, proper provision shall be
made so that each  holder of a Right  (except as  provided  below and in Section
7(e) hereof) shall  thereafter have the right to receive,  upon exercise thereof
at the  then  current  Purchase  Price  in  accordance  with  the  terms of this
Agreement,  in lieu of a number of one  two-hundredths  of a share of  Preferred
Stock,  such number of shares of Common  Stock of the Company as shall equal the
result obtained by (x)  multiplying the then current  Purchase Price by the then
number of one two-hundredths of a share of Preferred Stock for which a Right was
exercisable  immediately  prior to the first  occurrence of a Section  11(a)(ii)
Event,  and (y) dividing that product (which,  following such first  occurrence,
shall  thereafter be referred to as the "Purchase  Price" for each Right and for
all purposes of this  Agreement) by 50% of the Current Market Price  (determined

                                       39
<PAGE>

pursuant to Section  11(d) hereof) per share of Common Stock on the date of such
first occurrence (such number of shares, the "Adjustment Shares").

               (iii) In the event  that the  number  of  shares of Common  Stock
          which are authorized by the Company's Amended and Restated Certificate
          of  Incorporation,  but  which are not  outstanding  or  reserved  for
          issuance for purposes other than upon exercise of the Rights,  are not
          sufficient  to permit the exercise in full of the Rights in accordance
          with  the  foregoing  subparagraph  (ii) of this  Section  11(a),  the
          Company  shall  (A)  determine  the  value  of the  Adjustment  Shares
          issuable upon the exercise of a Right (the "Current  Value"),  and (B)
          with  respect to each Right  (subject to Section  7(e)  hereof),  make
          adequate provision to substitute for the Adjustment  Shares,  upon the
          exercise of a Right and payment of the applicable  Purchase Price, (1)
          cash, (2) a reduction in the Purchase Price, (3) Common Stock or other
          equity  securities  of the  Company  (including,  without  limitation,
          shares,  or units of shares, of preferred stock, such as 

                                       40
<PAGE>

          the Preferred  Stock,  which the Board has deemed to have  essentially
          the same  value or  economic  rights as shares of Common  Stock  (such
          shares  of  preferred   stock  being  referred  to  as  "Common  Stock
          Equivalents")),  (4) debt securities of the Company, (5) other assets,
          or (6) any  combination  of the foregoing,  having an aggregate  value
          equal to the Current  Value (less the amount of any  reduction  in the
          Purchase Price), where such aggregate value has been determined by the
          Board  based upon the  advice of a  nationally  recognized  investment
          banking firm  selected by the Board;  provided,  however,  that if the
                                                --------   -------
          Company  shall not have  made  adequate  provision  to  deliver  value
          pursuant to clause (B) above  within  thirty (30) days  following  the
          later of (x) the first occurrence of a Section 11(a)(ii) Event and (y)
          the date on  which  the  Company's  right of  redemption  pursuant  to
          Section  23(a)  expires  (the later of (x) and (y) being  referred  to
          herein as the  "Section  11(a)(ii)  Trigger  Date"),  then the Company
          shall be obligated to deliver,  upon the  surrender  for exercise of a
          Right and without requiring  payment 

                                       41
<PAGE>

          of  the  Purchase  Price,  shares  of  Common  Stock  (to  the  extent
          available) and then, if necessary, cash, which shares and/or cash have
          an aggregate value equal to the Spread.  For purposes of the preceding
          sentence,  the term "Spread"  shall mean the excess of (i) the Current
          Value over (ii) the Purchase  Price.  If the Board  determines in good
          faith that it is likely that  sufficient  additional  shares of Common
          Stock could be  authorized  for issuance  upon exercise in full of the
          Rights,  the thirty (30) day period set forth above may be extended to
          the extent  necessary,  but not more than  ninety  (90) days after the
          Section  11(a)(ii)  Trigger  Date,  in order that the Company may seek
          shareholder  approval for the  authorization of such additional shares
          (such thirty (30) day period, as it may be extended,  is herein called
          the "Substitution  Period").  To the extent that action is to be taken
          pursuant  to  the  first  and/or  third   sentences  of  this  Section
          11(a)(iii),  the Company (1) shall  provide,  subject to Section  7(e)
          hereof,  that such action  shall apply  uniformly  to all  outstanding

                                       42
<PAGE>
          
          Rights, and (2) may suspend the exercisability of the Rights until the
          expiration  of  the   Substitution   Period  in  order  to  seek  such
          shareholder  approval  for such  authorization  of  additional  shares
          and/or to  decide  the  appropriate  form of  distribution  to be made
          pursuant to such first sentence and to determine the value thereof. In
          the event of any such  suspension,  the  Company  shall issue a public
          announcement  stating that the  exercisability  of the Rights has been
          temporarily  suspended,  as well as a public announcement at such time
          as the suspension is no longer in effect. For purposes of this Section
          11(a)(iii),  the value of each  Adjustment  Share shall be the current
          market  price per share of the Common  Stock on the Section  11(a)(ii)
          Trigger  Date and the per share or per unit value of any Common  Stock
          Equivalent shall be deemed to equal the current market price per share
          of the Common Stock on such date.

          (b) In case the Company  shall fix a record  date for the  issuance of
     rights,  options or warrants to all holders of  Preferred  Stock  entitling
     them to 

                                       43
<PAGE>

     subscribe for or purchase (for a period  expiring  within  forty-five  (45)
     calendar days after such record date) Preferred Stock (or shares having the
     same rights,  privileges and  preferences as the shares of Preferred  Stock
     ("Equivalent  Preferred  Stock")) or securities  convertible into Preferred
     Stock or Equivalent Preferred Stock at a price per share of Preferred Stock
     or per share of Equivalent  Preferred  Stock (or having a conversion  price
     per share,  if a security  convertible  into Preferred  Stock or Equivalent
     Preferred Stock) less than the Current Market Price (as determined pursuant
     to Section 11(d) hereof) per share of Preferred  Stock on such record date,
     the  Purchase  Price  to be in  effect  after  such  record  date  shall be
     determined by multiplying the Purchase Price in effect immediately prior to
     such record date by a fraction,  the numerator of which shall be the number
     of shares of Preferred  Stock  outstanding  on such record  date,  plus the
     number of shares of Preferred  Stock which the aggregate  offering price of
     the total number of shares of Preferred Stock and/or  Equivalent  Preferred
     Stock so to be offered (and/or the aggregate  initial  conversion  price of
     the convertible securities so to be offered) would purchase at such Current
     Market Price, and the denominator of which shall be the number of shares of

                                       44
<PAGE>
    
     Preferred  Stock  outstanding  on such  record  date,  plus the  number  of
     additional shares of Preferred Stock and/or  Equivalent  Preferred Stock to
     be offered  for  subscription  or purchase  (or into which the  convertible
     securities  so to be  offered  are  initially  convertible).  In case  such
     subscription price may be paid by delivery of consideration, part or all of
     which may be in a form  other than  cash,  the value of such  consideration
     shall be as  determined  in good  faith by the  Board of  Directors  of the
     Company,  whose  determination shall be described in a statement filed with
     the Rights  Agent and shall be binding on the Rights  Agent and the holders
     of the Rights.  Shares of Preferred  Stock owned by or held for the account
     of the Company shall not be deemed  outstanding for the purpose of any such
     computation.  Such adjustment  shall be made  successively  whenever such a
     record date is fixed, and in the event that such rights or warrants are not
     so issued,  the Purchase  Price shall be adjusted to be the Purchase  Price
     which would then be in effect if such record date had not been fixed.

          (c) In case the Company shall fix a record date for a distribution  to
     all holders of Preferred  Stock  (including any such  distribution  made in
     connection  with a  consolidation  or merger in which  the  

                                       45
<PAGE>

     Company is the continuing  corporation) of evidences of indebtedness,  cash
     (other  than a regular  quarterly  cash  dividend  out of the  earnings  or
     retained earnings of the Company), assets (other than a dividend payable in
     Preferred  Stock,  but including  any dividend  payable in stock other than
     Preferred Stock) or evidences of indebtedness, or of subscription rights or
     warrants  (excluding  those  referred  to in  Section  11(b)  hereof),  the
     Purchase  Price to be in effect after such record date shall be  determined
     by  multiplying  the  Purchase  Price in effect  immediately  prior to such
     record  date by a  fraction,  the  numerator  of which shall be the Current
     Market Price (as determined  pursuant to Section 11(d) hereof) per share of
     Preferred  Stock  on such  record  date,  less the fair  market  value  (as
     determined  in good faith by the Board of Directors  of the Company,  whose
     determination  shall be  described  in a  statement  filed  with the Rights
     Agent) of the portion of the cash,  assets or evidences of  indebtedness so
     to be distributed or of such subscription  rights or warrants applicable to
     a share of  Preferred  Stock,  and the  denominator  of which shall be such
     Current Market Price (as  determined  pursuant to Section 11(d) hereof) per
     share of  Preferred  Stock.  Such  adjustments  shall be made  successively
     whenever  such  a  record  date  is  fixed,  

                                       46
<PAGE>

     and in the event that such  distribution is not so made, the Purchase Price
     shall be adjusted to be the Purchase  Price which would have been in effect
     if such record date had not been fixed.

          (d)(i)  For the  purpose  of any  computation  hereunder,  other  than
     computations made pursuant to Section 11(a)(iii) hereof, the Current Market
     Price  per  share of  Common  Stock on any date  shall be  deemed to be the
     average of the daily closing  prices per share of such Common Stock for the
     thirty (30) consecutive  Trading Days  immediately  prior to such date, and
     for purposes of computations  made pursuant to Section  11(a)(iii)  hereof,
     the  Current  Market  Price per share of Common  Stock on any date shall be
     deemed to be the  average  of the daily  closing  prices  per share of such
     Common  Stock  for  the  ten  (10)  consecutive  Trading  Days  immediately
     following such date; provided,  however, that in the event that the Current
                          --------   -------   
     Market  Price per share of the Common Stock is  determined  during a period
     following  the  announcement  by the issuer of such  Common  Stock of (A) a
     dividend or  distribution  on such Common  Stock  payable in shares of such
     Common  Stock or  securities  convertible  into shares of such Common Stock
     (other  than  the  Rights),   or  (B)  any   subdivision,   combination  or
     reclassification  of such 

                                       47
<PAGE>

     Common Stock,  and the ex-dividend  date for such dividend or distribution,
     or the record date for such  subdivision,  combination or  reclassification
     shall not have occurred prior to the  commencement of the requisite  thirty
     (30) Trading Day or ten (10) Trading Day period, as set forth above,  then,
     and in each such case, the Current Market Price shall be properly  adjusted
     to take into account  ex-dividend  trading.  The closing price for each day
     shall be the last sale price,  regular  way, or, in case no such sale takes
     place on such day, the average of the closing bid and asked prices, regular
     way, in either case as reported in the principal  consolidated  transaction
     reporting  system with respect to securities  listed or admitted to trading
     on the New York Stock  Exchange  or, if the shares of Common  Stock are not
     listed or admitted to trading on the New York Stock  Exchange,  as reported
     in the principal consolidated  transaction reporting system with respect to
     securities listed on the principal  national  securities  exchange on which
     the shares of Common  Stock are listed or  admitted  to trading  or, if the
     shares  of Common  Stock  are not  listed or  admitted  to  trading  on any
     national securities  exchange,  the last quoted price or, if not so quoted,
     the  average of the high bid and low asked  prices in the  over-the-counter
     market,  as reported 

                                       48
<PAGE>

     by the National  Association  of  Securities  Dealers  Automated  Quotation
     System ("NASDAQ") or such other system then in use, or, if on any such date
     the  shares of Common  Stock are not quoted by any such  organization,  the
     average of the closing bid and asked prices as furnished by a  professional
     market maker making a market in the Common Stock selected by the Board.  If
     on any such date no market  maker is making a market in the  Common  Stock,
     the fair value of such shares on such date as  determined  in good faith by
     the Board shall be used.  The term  "Trading Day" shall mean a day on which
     the principal  national  securities  exchange on which the shares of Common
     Stock are listed or  admitted  to trading  is open for the  transaction  of
     business  or, if the shares of Common  Stock are not listed or  admitted to
     trading on any national securities  exchange, a Business Day. If the Common
     Stock is not publicly held or not so listed or traded, Current Market Price
     per share shall mean the fair value per share as  determined  in good faith
     by the Board, whose  determination  shall be described in a statement filed
     with the Rights Agent and shall be conclusive for all purposes.

               (ii) For the purpose of any  computation  hereunder,  the Current
          Market Price 

                                       49
<PAGE>

          per share of Preferred Stock shall be determined in the same manner as
          set forth  above for the Common  Stock in clause  (i) of this  Section
          11(d) (other than the last sentence  thereof).  If the Current  Market
          Price per share of Preferred  Stock cannot be determined in the manner
          provided  above  or if the  Preferred  Stock is not  publicly  held or
          listed or traded in a manner  described  in clause (i) of this Section
          11(d),  the Current Market Price per share of Preferred Stock shall be
          conclusively  deemed to be an amount  equal to 200 (as such number may
          be  appropriately  adjusted  for such  events as stock  splits,  stock
          dividends  and  recapitalizations  with  respect to the  Common  Stock
          occurring after the date of this Agreement)  multiplied by the Current
          Market  Price per share of the Common  Stock.  If  neither  the Common
          Stock nor the Preferred Stock is publicly held or so listed or traded,
          Current  Market Price per share of the Preferred  Stock shall mean the
          fair value per share as determined  in good faith by the Board,  whose
          determination  shall be described in a statement filed with the Rights
          Agent and 

                                       50
<PAGE>

          shall  be  conclusive  for  all  purposes.  For all  purposes  of this
          Agreement,  the Current  Market  Price of a Unit shall be equal to the
          Current Market Price of one share of Preferred Stock divided by 200.

          (e) Anything herein to the contrary notwithstanding,  no adjustment in
     the Purchase Price shall be required unless such  adjustment  would require
     an increase or decrease of at least one percent (1%) in the Purchase Price;
     provided,  however,  that any  adjustments  which by reason of this Section
     --------   -------
     11(e) are not  required to be made shall be carried  forward and taken into
     account in any subsequent  adjustment.  All calculations under this Section
     11 shall be made to the nearest cent or to the nearest  ten-thousandth of a
     share  of  Common  Stock  or other  share  or  one-millionth  of a share of
     Preferred Stock, as the case may be.  Notwithstanding the first sentence of
     this Section  11(e),  any  adjustment  required by this Section 11 shall be
     made no later than the  earlier of (i) three (3) years from the date of the
     transaction which mandates such adjustment, or (ii) the Expiration Date.

          (f) If as a result of an adjustment made pursuant to Section 11(a)(ii)
     or Section 13(a) hereof, 

                                       51
<PAGE>

     the holder of any Right  thereafter  exercised  shall  become  entitled  to
     receive any shares of capital stock other than Preferred Stock,  thereafter
     the number of such other shares so  receivable  upon  exercise of any Right
     and the Purchase Price thereof shall be subject to adjustment  from time to
     time in a manner and on terms as nearly  equivalent as  practicable  to the
     provisions with respect to the Preferred Stock contained in Sections 11(a),
     (b), (c),  (e),  (g),  (h),  (i),  (j), (k) and (m), and the  provisions of
     Sections 7, 9, 10, 13 and 14 hereof  with  respect to the  Preferred  Stock
     shall apply on like terms to any such other shares.

          (g) All Rights  originally  issued by the  Company  subsequent  to any
     adjustment made to the Purchase Price hereunder shall evidence the right to
     purchase,  at the adjusted Purchase Price, the number of one two-hundredths
     of a share of Preferred Stock  purchasable from time to time hereunder upon
     exercise  of the  Rights,  all  subject to further  adjustment  as provided
     herein.

          (h) Unless the Company  shall have  exercised its election as provided
     in Section 11(i), upon each adjustment of the Purchase Price as a result of
     the  calculations  made in Sections  11(b) and (c), each Right  outstanding
     immediately  prior  to the  making  of  such  

                                       52
<PAGE>

     adjustment shall thereafter evidence the right to purchase, at the adjusted
     Purchase Price,  that number of one  two-hundredths of a share of Preferred
     Stock (calculated to the nearest one-millionth) obtained by (i) multiplying
     (x)  the  number  of one  two-hundredths  of a  share  covered  by a  Right
     immediately  prior to this adjustment,  by (y) the Purchase Price in effect
     immediately  prior  to such  adjustment  of the  Purchase  Price,  and (ii)
     dividing  the  product  so  obtained  by  the  Purchase   Price  in  effect
     immediately after such adjustment of the Purchase Price.

          (i) The  Company may elect on or after the date of any  adjustment  of
     the  Purchase  Price  to  adjust  the  number  of  Rights,  in  lieu of any
     adjustment  in the  number of one  two-hundredths  of a share of  Preferred
     Stock  purchasable  upon  the  exercise  of a  Right.  Each  of the  Rights
     outstanding  after  the  adjustment  in  the  number  of  Rights  shall  be
     exercisable  for the number of one  two-hundredths  of a share of Preferred
     Stock  for  which  a  Right  was  exercisable  immediately  prior  to  such
     adjustment.  Each  Right  held of record  prior to such  adjustment  of the
     number of Rights  shall  become  that number of Rights  (calculated  to the
     nearest  one-ten-thousandth)  obtained by dividing  the  Purchase  Price in
     effect  immediately  prior  to  adjustment  of the  Purchase  Price  by the

                                       53
<PAGE>
     
     Purchase  Price in effect  immediately  after  adjustment  of the  Purchase
     Price.  The Company  shall make a public  announcement  of its  election to
     adjust the number of Rights, indicating the record date for the adjustment,
     and, if known at the time,  the amount of the  adjustment to be made.  This
     record date may be the date on which the Purchase  Price is adjusted or any
     day thereafter,  but, if the Rights Certificates have been issued, shall be
     at least ten (10) days later than the date of the public  announcement.  If
     Rights Certificates have been issued, upon each adjustment of the number of
     Rights  pursuant to this Section 11(i),  the Company shall,  as promptly as
     practicable,  cause to be  distributed  to  holders  of  record  of  Rights
     Certificates on such record date Rights Certificates evidencing, subject to
     Section 14 hereof,  the  additional  Rights to which such holders  shall be
     entitled as a result of such adjustment,  or, at the option of the Company,
     shall cause to be distributed to such holders of record in substitution and
     replacement for the Rights  Certificates  held by such holders prior to the
     date of adjustment, and upon surrender thereof, if required by the Company,
     new Rights  Certificates  evidencing  all the Rights to which such  holders
     shall be  entitled  after such  adjustment.  Rights  Certificates  so to be

                                       54
<PAGE>
     
     distributed  shall be  issued,  executed  and  countersigned  in the manner
     provided  for  herein  (and may bear,  at the  option of the  Company,  the
     adjusted  Purchase  Price)  and  shall be  registered  in the  names of the
     holders of record of Rights  Certificates  on the record date  specified in
     the public announcement.

          (j)  Irrespective of any adjustment or change in the Purchase Price or
     the number of one  two-hundredths  of a share of Preferred  Stock  issuable
     upon the exercise of the Rights,  the Rights  Certificates  theretofore and
     thereafter  issued may  continue  to  express  the  Purchase  Price per one
     two-hundredth  of a share and the number of one  two-hundredths  of a share
     which were expressed in the initial Rights Certificates issued hereunder.

          (k) Before taking any action that would cause an  adjustment  reducing
     the Purchase  Price below the then stated  value,  if any, of the number of
     one  two-hundredths of a share of Preferred Stock issuable upon exercise of
     the Rights,  the Company shall take any corporate  action which may, in the
     opinion of its counsel,  be necessary in order that the Company may validly
     and  legally  issue  fully  paid  and  nonassessable  such  number  of  

                                       55
<PAGE>

     one  two-hundredths of a share of Preferred Stock at such adjusted Purchase
     Price.

          (l) In any  case in  which  this  Section  11  shall  require  that an
     adjustment in the Purchase  Price be made effective as of a record date for
     a specified  event,  the Company may elect to defer until the occurrence of
     such event the  issuance  to the holder of any Right  exercised  after such
     record date the number of one  two-hundredths of a share of Preferred Stock
     and other capital stock or securities of the Company, if any, issuable upon
     such exercise over and above the number of one two-hundredths of a share of
     Preferred  Stock and other capital  stock or securities of the Company,  if
     any,  issuable  upon such  exercise on the basis of the  Purchase  Price in
     effect prior to such adjustment;  provided, however, that the Company shall
                                       --------  -------     
     deliver  to  such  holder  a  due  bill  or  other  appropriate  instrument
     evidencing   such  holder's  right  to  receive  such   additional   shares
     (fractional  or otherwise) or securities  upon the  occurrence of the event
     requiring such adjustment.

          (m) Anything in this Section 11 to the contrary  notwithstanding,  the
     Company shall be entitled to make such reductions in the Purchase Price, in
     addition to those adjustments expressly required by this 

                                       56
<PAGE>

     Section  11, as and to the extent  that in their good  faith  judgment  the
     Board of Directors of the Company shall  determine to be advisable in order
     that any (i)  consolidation  or  subdivision of the Preferred  Stock,  (ii)
     issuance  wholly for cash of any shares of Preferred Stock at less than the
     Current Market Price, (iii) issuance wholly for cash of shares of Preferred
     Stock  or  securities   which  by  their  terms  are  convertible  into  or
     exchangeable  for shares of Preferred  Stock,  (iv) stock  dividends or (v)
     issuance  of rights,  options or warrants  referred to in this  Section 11,
     hereafter  made by the Company to holders of its Preferred  Stock shall not
     be taxable to such stockholders.

          (n) The  Company  covenants  and agrees that it shall not, at any time
     after the  Distribution  Date, (i) consolidate with any other Person (other
     than a  Subsidiary  of the Company in a  transaction  which  complies  with
     Section 11(o) hereof), (ii) merge with or into any other Person (other than
     a Subsidiary  of the Company in a transaction  which  complies with Section
     11(o) hereof),  or (iii) sell or transfer (or permit any Subsidiary to sell
     or  transfer),  in one  transaction,  or a series of related  transactions,
     assets,  cash flow or earning power aggregating more than 50% of the assets
     or earning power of 

                                       57
<PAGE>

     the Company and its Subsidiaries  (taken as a whole) to any other Person or
     Persons  (other than the Company and/or any of its  Subsidiaries  in one or
     more transactions each of which complies with Section 11(o) hereof), if (x)
     at the time of or  immediately  after  such  consolidation,  merger or sale
     there  are  any  rights,   warrants  or  other  instruments  or  securities
     outstanding or agreements in effect which would  substantially  diminish or
     otherwise  eliminate the benefits  intended to be afforded by the Rights or
     (y) prior to,  simultaneously with or immediately after such consolidation,
     merger or sale, the  shareholders of the Person who  constitutes,  or would
     constitute,  the  "Principal  Party" for  purposes of Section  13(a) hereof
     shall  have  received a  distribution  of Rights  previously  owned by such
     Person or any of its Affiliates and Associates.

          (o) The Company  covenants  and agrees  that,  after the  Distribution
     Date, it will not,  except as permitted by Section 23 or Section 26 hereof,
     take (or  permit  any  Subsidiary  to take) any  action if at the time such
     action is taken it is reasonably foreseeable that such action will diminish
     substantially or otherwise  eliminate the benefits  intended to be afforded
     by the Rights.

                                       58
<PAGE>

          (p) Anything in this Agreement to the contrary notwithstanding, in the
     event  that the  Company  shall  at any  time  after  the  Rights  Dividend
     Declaration Date and prior to the Distribution  Date (i) declare a dividend
     on the  outstanding  shares of  Common  Stock  payable  in shares of Common
     Stock,  (ii)  subdivide the  outstanding  shares of Common Stock,  or (iii)
     combine the  outstanding  shares of Common  Stock into a smaller  number of
     shares,  the number of Rights  associated  with each share of Common  Stock
     then  outstanding,  or  issued  or  delivered  thereafter  but prior to the
     Distribution Date, shall be proportionately  adjusted so that the number of
     Rights thereafter  associated with each share of Common Stock following any
     such event shall equal the result  obtained  by  multiplying  the number of
     Rights associated with each share of Common Stock immediately prior to such
     event by a fraction the numerator which shall be the total number of shares
     of Common Stock  outstanding  immediately  prior to the  occurrence  of the
     event and the  denominator  of which shall be the total number of shares of
     Common Stock  outstanding  immediately  following  the  occurrence  of such
     event.

                                       59
<PAGE>


     Section 12.  Certificate  of Adjusted  Purchase  Price or Number of Shares.
                  -------------------------------------------------------------
Whenever an  adjustment is made as provided in Section 11 and Section 13 hereof,
the  Company  shall  (a)  promptly  prepare a  certificate  setting  forth  such
adjustment and a brief  statement of the facts  accounting for such  adjustment,
(b) promptly  file with the Rights Agent,  and with each transfer  agent for the
Preferred  Stock and the Common Stock, a copy of such  certificate  and (c) if a
Distribution Date has occurred, mail a brief summary thereof to each holder of a
Rights  Certificate in accordance with Section 27 hereof. The Rights Agent shall
be fully  protected  in relying on any such  certificate  and on any  adjustment
therein contained.


     Section 13. Consolidation,  Merger or Sale or Transfer of Assets, Cash Flow
                 ---------------------------------------------------------------
or Earning Power.
- ----------------

          (a) In the event that,  following the Stock Acquisition Date, directly
     or indirectly,  (x) the Company shall  consolidate  with, or merge with and
     into,  any other  Person  (other  than a  Subsidiary  of the  Company  in a
     transaction  which  complies  with Section 11(o)  hereof),  and the Company
     shall not be the continuing or surviving  corporation of such consolidation
     or merger,  (y) any Person  (other  than a  Subsidiary  of the Company in a
     transaction  which  complies with Section  11(o) hereof) 

                                       60
<PAGE>

     shall consolidate with, or merge with or into, the Company, and the Company
     shall be the continuing or surviving  corporation of such  consolidation or
     merger and, in connection with such consolidation or merger, all or part of
     the  outstanding  shares of Common Stock shall be changed into or exchanged
     for  stock or other  securities  of any  other  Person or cash or any other
     property,  or (z) the Company  shall sell or otherwise  transfer (or one or
     more  of  its  Subsidiaries  shall  sell  or  otherwise  transfer),  in one
     transaction  or a series  of  related  transactions,  assets,  cash flow or
     earning power aggregating more than 50% of the assets, cash flow or earning
     power of the Company and its Subsidiaries  (taken as a whole) to any Person
     or Persons  (other than the Company or any Subsidiary of the Company in one
     or more  transactions  each of which  complies with Section 11(o)  hereof),
     then, and in each such case (except as may be contemplated by Section 13(d)
     hereof),  proper  provision  shall be made so that:  (i) each  holder  of a
     Right, except as provided in Section 7(e) hereof, shall thereafter have the
     right to receive,  upon the exercise  thereof at the then current  Purchase
     Price in  accordance  with the  terms of this  Agreement,  such  number  of
     validly  authorized  and  issued,  fully  paid,  non-assessable  and freely
     tradeable  shares of 

                                       61
<PAGE>

     Common Stock of the Principal Party (as such term is hereinafter  defined),
     not subject to any liens,  encumbrances,  rights of first  refusal or other
     adverse claims, as shall be equal to the result obtained by (1) multiplying
     the then current  Purchase Price by the number of one  two-hundredths  of a
     share of Preferred Stock for which a Right is exercisable immediately prior
     to the first  occurrence of a Section 13 Event (or, if a Section  11(a)(ii)
     Event has  occurred  prior to the first  occurrence  of a Section 13 Event,
     multiplying  the number of such one  two-hundredths  of a share for which a
     Right  was  exercisable  immediately  prior to the  first  occurrence  of a
     Section  11(a)(ii) Event by the Purchase Price in effect  immediately prior
     to such first occurrence),  and dividing that product (which, following the
     first  occurrence  of a  Section  13  Event,  shall be  referred  to as the
     "Purchase  Price" for each Right and for all purposes of this Agreement) by
     (2)  50% of the  Current  Market  Price  (determined  pursuant  to  Section
     11(d)(i)  hereof) per share of the Common Stock of such Principal  Party on
     the date of  consummation  of such  Section 13 Event;  (ii) such  Principal
     Party shall  thereafter be liable for, and shall assume,  by virtue of such
     Section 13 Event, all the obligations and duties of the Company pursuant to
     this  

                                       62
<PAGE>

     Agreement;  (iii) the term "Company" shall thereafter be deemed to refer to
     such Principal Party, it being specifically intended that the provisions of
     Section 11 hereof shall apply only to such  Principal  Party  following the
     first  occurrence of a Section 13 Event;  (iv) such  Principal  Party shall
     take such  steps  (including,  but not  limited  to, the  reservation  of a
     sufficient  number of shares of its Common  Stock) in  connection  with the
     consummation of any such transaction as may be necessary to assure that the
     provisions  hereof shall thereafter be applicable,  as nearly as reasonably
     may be, in relation to its shares of Common  Stock  thereafter  deliverable
     upon  the  exercise  of the  Rights;  and (v)  the  provisions  of  Section
     11(a)(ii)  hereof shall be of no effect  following the first  occurrence of
     any Section 13 Event.
                
          (b) "Principal Party" shall mean:

               (i) in the case of any transaction described in clause (x) or (y)
          of the first sentence of Section 13(a),  the Person that is the issuer
          of any securities into which shares of Common Stock of the Company are
          converted in such merger or consolidation, and if no securities are so
          issued,  the  Person  that  is 

                                       63
<PAGE>

          the other party to such merger or consolidation; and

               (ii) in the case of any  transaction  described  in clause (z) of
          the first  sentence  of Section  13(a),  the Person  that is the party
          receiving  the  greatest  portion of the assets,  cash flow or earning
          power transferred pursuant to such transaction or transactions;

          provided,  however,  that in any such case, (1) if the Common Stock of
          --------   -------
          such Person is not at such time and has not been continuously over the
          preceding twelve (12) month period  registered under Section 12 of the
          Exchange  Act, and such Person is a direct or indirect  Subsidiary  of
          another  Person  the  Common  Stock  of  which  is  and  has  been  so
          registered,  "Principal  Party" shall refer to such other Person;  and
          (2) in case such Person is a Subsidiary,  directly or  indirectly,  of
          more than one  Person,  the Common  Stocks of two or more of which are
          and  have  been  so  registered,  "Principal  Party"  shall  refer  to
          whichever of such Persons is the issuer of the Common Stock having the
          greatest aggregate market value.

          (c) The Company shall not consummate any such  consolidation,  merger,
     sale or transfer unless the Principal Party shall have a sufficient  number
     of  autho-

                                       64
<PAGE>

     rized shares of its Common Stock which have not been issued or reserved for
     issuance to permit the  exercise in full of the Rights in  accordance  with
     this  Section 13 and unless  prior  thereto the Company and such  Principal
     Party shall have executed and delivered to the Rights Agent a  supplemental
     agreement  providing for the terms set forth in  paragraphs  (a) and (b) of
     this Section 13 and further  providing  that, as soon as practicable  after
     the  date of any  consolidation,  merger  or sale of  assets  mentioned  in
     paragraph (a) of this Section 13, the Principal Party will

               (i) prepare and file a registration statement under the Act, with
          respect to the Rights and the securities  purchasable upon exercise of
          the Rights on an  appropriate  form,  and will use its best efforts to
          cause such  registration  statement to (A) become effective as soon as
          practicable  after  such  filing  and  (B)  remain  effective  (with a
          prospectus at all times meeting the requirements of the Act) until the
          Expiration Date; and

               (ii)  take such all such  other  action  as may be  necessary  to
          enable the Principal  Party to issue the securities  purchasable  

                                       65
<PAGE>

          upon  exercise  of  the  Rights,  including  but  not  limited  to the
          registration or  qualification  of such securities under all requisite
          securities laws of jurisdictions of the various states and the listing
          of such  securities on such  exchanges  and trading  markets as may be
          necessary or appropriate; and

               (iii) will deliver to holders of the Rights historical  financial
          statements for the Principal  Party and each of its  Affiliates  which
          comply in all respects with the  requirements for registration on Form
          10 under the Exchange Act.

The provisions of this Section 13 shall similarly apply to successive mergers or
consolidations or sales or other transfers. In the event that a Section 13 Event
shall occur at any time after the occurrence of a Section  11(a)(ii)  Event, the
Rights  which  have not  theretofore  been  exercised  shall  thereafter  become
exercisable in the manner described in Section 13(a).

          (d)  Notwithstanding  anything  in  this  Agreement  to the  contrary,
     Section  13  shall  not  be  applicable  to  a  transaction   described  in
     subparagraphs  (x) and (y) of  Section  13(a)  if (i) such  transaction  is
     consum-

                                       66
<PAGE>

     mated with a Person or Persons who acquired shares of Common Stock pursuant
     to a tender offer or exchange  offer for all  outstanding  shares of Common
     Stock  which  is a  Qualified  Offer as such  term is  defined  in  Section
     11(a)(ii)  hereof  (or a wholly  owned  subsidiary  of any such  Person  or
     Persons),  (ii)  the  price  per  share of  Common  Stock  offered  in such
     transaction  is not less than the price per share of Common  Stock  paid to
     all holders of shares of Common Stock whose shares were purchased  pursuant
     to such tender offer or exchange offer and (iii) the form of  consideration
     being offered to the remaining  holders of shares of Common Stock  pursuant
     to such transaction is the same as the form of consideration  paid pursuant
     to such  tender  offer or exchange  offer.  Upon  consummation  of any such
     transaction  contemplated by this Section 13(d), all Rights hereunder shall
     expire.


     Section 14. Fractional Rights and Fractional Shares.
                 ---------------------------------------

          (a) The Company  shall not be required to issue  fractions  of Rights,
     except prior to the Distribution  Date as provided in Section 11(p) hereof,
     or to distribute Rights  Certificates which evidence  fractional Rights. In
     lieu of such  fractional  Rights,  the Company shall pay to the  registered
     holders of the Rights  Cer-

                                       67
<PAGE>

     tificates with regard to which such  fractional  Rights would  otherwise be
     issuable,  an  amount in cash  equal to the same  fraction  of the  current
     market value of a whole Right.  For  purposes of this  Section  14(a),  the
     current  market  value of a whole Right  shall be the closing  price of the
     Rights  for the  Trading  Day  immediately  prior to the date on which such
     fractional Rights would have been otherwise issuable.  The closing price of
     the Rights for any day shall be the last sale price,  regular  way,  or, in
     case no such sale takes  place on such day,  the average of the closing bid
     and asked prices,  regular way, in either case as reported in the principal
     consolidated transaction reporting system with respect to securities listed
     or admitted to trading on the New York Stock Exchange or, if the Rights are
     not  listed or  admitted  to trading  on the New York  Stock  Exchange,  as
     reported in the principal  consolidated  transaction  reporting system with
     respect to securities listed on the principal national  securities exchange
     on which the Rights are listed or admitted to trading, or if the Rights are
     not listed or admitted to trading on any national securities exchange,  the
     last quoted price or, if not so quoted, the average of the high bid and low
     asked prices in the over-the-counter  market, as reported by NASDAQ or such
     other  system then 

                                       68
<PAGE>

     in use or,  if on any  such  date the  Rights  are not  quoted  by any such
     organization,  the average of the closing bid and asked prices as furnished
     by a professional  market maker making a market in the Rights,  selected by
     the Board of Directors  of the Company.  If on any such date no such market
     maker is making a market in the  Rights,  the fair  value of the  Rights on
     such date as  determined  in good  faith by the Board of  Directors  of the
     Company shall be used.

          (b) The Company shall not be required to issue  fractions of shares of
     Preferred Stock (other than fractions  which are integral  multiples of one
     two-hundredth of a share of Preferred Stock) upon exercise of the Rights or
     to distribute  certificates  which evidence  fractional shares of Preferred
     Stock  (other  than   fractions   which  are  integral   multiples  of  one
     two-hundredth of a share of Preferred  Stock). In lieu of fractional shares
     of Preferred Stock that are not integral  multiples of one two-hundredth of
     a share of Preferred Stock,  the Company may pay to the registered  holders
     of Rights  Certificates  at the time such  Rights are  exercised  as herein
     provided an amount in cash equal to the same fraction of the current market
     value of one  two-hundredth  of a share of Preferred Stock. For purposes of
     this 

                                       69
<PAGE>

     Section 14(b), the current market value of one  two-hundredth of a share of
     Preferred Stock shall be one  two-hundredth of the closing price of a share
     of Preferred Stock (as determined pursuant to Section 11(d)(ii) hereof) for
     the Trading Day immediately prior to the date of such exercise.

          (c) Following the occurrence of a Triggering  Event, the Company shall
     not be required to issue  fractions of shares of Common Stock upon exercise
     of the  Rights or to  distribute  certificates  which  evidence  fractional
     shares of Common Stock. In lieu of fractional  shares of Common Stock,  the
     Company may pay to the  registered  holders of Rights  Certificates  at the
     time such Rights are  exercised as herein  provided an amount in cash equal
     to the same fraction of the current market value of one (1) share of Common
     Stock.  For purposes of this Section 14(c), the current market value of one
     share of Common  Stock  shall be the  closing  price of one share of Common
     Stock (as determined  pursuant to Section  11(d)(i) hereof) for the Trading
     Day immediately prior to the date of such exercise.

          (d) The holder of a Right by the  acceptance  of the Rights  expressly
     waives his right to receive any fractional  Rights or any fractional shares
     upon 

                                       70
<PAGE>

     exercise of a Right, except as permitted by this Section 14.


     Section  15.  Rights of  Action.  All  rights of action in  respect of this
                   -----------------
Agreement  are  vested  in the  respective  registered  holders  of  the  Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Rights Certificate (or, prior to
the Distribution  Date, of the Common Stock),  without the consent of the Rights
Agent  or of the  holder  of any  other  Rights  Certificate  (or,  prior to the
Distribution Date, of the Common Stock),  may, in his own behalf and for his own
benefit,  enforce, and may institute and maintain any suit, action or proceeding
against  the Company to enforce,  or  otherwise  act in respect of, his right to
exercise the Rights evidenced by such Rights  Certificate in the manner provided
in such Rights Certificate and in this Agreement. Without limiting the foregoing
or  any  remedies  available  to  the  holders  of  Rights,  it is  specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this  Agreement and shall be entitled to specific  performance
of the obligations  hereunder and injunctive relief against actual or threat-

                                       71
<PAGE>

ened  violations  of the  obligations  hereunder  of any Person  subject to this
Agreement.


     Section  16.  Agreement  of  Rights  Holders.  Every  holder  of a Right by
                   ------------------------------
accepting the same consents and agrees with the Company and the Rights Agent and
with every other holder of a Right that:

          (a) prior to the  Distribution  Date, the Rights will be  transferable
     only in connection with the transfer of Common Stock;

          (b)  after  the  Distribution   Date,  the  Rights   Certificates  are
     transferable  only on the registry books of the Rights Agent if surrendered
     at the principal  office or offices of the Rights Agent designated for such
     purposes,  duly endorsed or accompanied by a proper  instrument of transfer
     and with the appropriate forms and certificates fully executed;

          (c) subject to Section 6(a) and Section  7(f) hereof,  the Company and
     the  Rights  Agent  may deem and treat  the  person in whose  name a Rights
     Certificate  (or, prior to the  Distribution  Date,  the associated  Common
     Stock  certificate)  is registered as the absolute owner thereof and of the
     Rights  evidenced  thereby  (notwithstanding  any notations of ownership or
     writing  on  the  Rights   Certificates  or  the  associated  Common  Stock
     cer-

                                       72
<PAGE>

     tificate made by anyone other than the Company or the Rights Agent) for all
     purposes whatsoever,  and neither the Company nor the Rights Agent, subject
     to the last  sentence  of Section  7(e)  hereof,  shall be  required  to be
     affected by any notice to the contrary; and

          (d)  notwithstanding  anything  in  this  Agreement  to the  contrary,
     neither the Company nor the Rights  Agent shall have any  liability  to any
     holder of a Right or other  Person as a result of its  inability to perform
     any of its obligations under this Agreement by reason of any preliminary or
     permanent  injunction or other order, decree or ruling issued by a court of
     competent  jurisdiction or by a governmental,  regulatory or administrative
     agency or commission,  or any statute,  rule, regulation or executive order
     promulgated  or  enacted  by any  governmental  authority,  prohibiting  or
     otherwise restraining  performance of such obligation;  provided,  however,
     the Company  must use its best  efforts to have any such  order,  decree or
     ruling lifted or otherwise overturned as soon as possible.


     Section 17. Rights Certificate Holder Not Deemed a Stockholder.  No holder,
                 --------------------------------------------------
as such, of any Rights  Certificate shall be entitled to vote, receive dividends
or be deemed for any purpose the holder of the number of 

                                       73
<PAGE>

one  two-hundredths of a share of Preferred Stock or any other securities of the
Company  which  may at any  time  be  issuable  on the  exercise  of the  Rights
represented  thereby,  nor shall  anything  contained  herein  or in any  Rights
Certificate be construed to confer upon the holder of any Rights Certificate, as
such, any of the rights of a stockholder of the Company or any right to vote for
the election of directors or upon any matter  submitted to  stockholders  at any
meeting thereof,  or to give or withhold consent to any corporate  action, or to
receive notice of meetings or other actions  affecting  stockholders  (except as
provided in Section 25 hereof), or to receive dividends or subscription  rights,
or  otherwise,  until the Right or Rights  evidenced by such Rights  Certificate
shall have been exercised in accordance with the provisions hereof.


     Section 18. Concerning the Rights Agent.
                 ---------------------------

          (a)  The  Company  agrees  to  pay  to  the  Rights  Agent  reasonable
     compensation  for all services  rendered by it hereunder  and, from time to
     time, on demand of the Rights Agent,  its  reasonable  expenses and counsel
     fees  and   disbursements   and  other   disbursements   incurred   in  the
     administration  and  execution  of  this  Agreement  and the  exercise  and
     performance of its duties  

                                       74
<PAGE>

     hereunder.  The Company also agrees to indemnify  the Rights Agent for, and
     to hold it harmless  against,  any loss,  liability,  or expense,  incurred
     without gross  negligence,  bad faith or willful  misconduct on the part of
     the Rights  Agent,  for  anything  done or  omitted by the Rights  Agent in
     connection  with  the  acceptance  and  administration  of this  Agreement,
     including  the  costs  and  expenses  of  defending  against  any  claim of
     liability in the premises.

          (b) The Rights Agent shall be  protected  and shall incur no liability
     for or in  respect  of any  action  taken,  suffered  or  omitted  by it in
     connection with its  administration  of this Agreement in reliance upon any
     Rights  Certificate or certificate for Common Stock or for other securities
     of the Company,  instrument of  assignment or transfer,  power of attorney,
     endorsement,  affidavit, letter, notice, direction,  consent,  certificate,
     statement,  or other paper or document  believed by it to be genuine and to
     be signed, executed and, where necessary,  verified or acknowledged, by the
     proper Person or Persons.


                                       75
<PAGE>

     Section 19. Merger or Consolidation or Change of Name of Rights Agent.
                 ---------------------------------------------------------

          (a) Any  corporation  into  which the  Rights  Agent or any  successor
     Rights  Agent may be merged or with  which it may be  consolidated,  or any
     corporation  resulting from any merger or consolidation to which the Rights
     Agent or any successor  Rights Agent shall be a party,  or any  corporation
     succeeding  to the corporate  trust,  stock  transfer or other  shareholder
     services business of the Rights Agent or any successor Rights Agent,  shall
     be the  successor  to the Rights  Agent  under this  Agreement  without the
     execution  or filing of any paper or any  further act on the part of any of
     the parties  hereto;  but only if such  corporation  would be eligible  for
     appointment as a successor  Rights Agent under the provisions of Section 21
     hereof.  In case at the time such  successor  Rights Agent shall succeed to
     the agency created by this Agreement,  any of the Rights Certificates shall
     have been countersigned but not delivered,  any such successor Rights Agent
     may adopt the  countersignature  of a predecessor  Rights Agent and deliver
     such Rights Certificates so countersigned;  and in case at that time any of
     the Rights  Certificates shall not have been  countersigned,  any successor
     Rights Agent may countersign such Rights Certificates 

                                       76
<PAGE>

     either  in the  name of the  predecessor  or in the  name of the  successor
     Rights Agent; and in all such cases such Rights Certificates shall have the
     full force provided in the Rights Certificates and in this Agreement.

          (b) In case at any time the name of the Rights  Agent shall be changed
     and  at  such  time  any  of  the  Rights   Certificates  shall  have  been
     countersigned   but  not   delivered,   the  Rights  Agent  may  adopt  the
     countersignature  under its prior name and deliver Rights  Certificates  so
     countersigned;  and in case at that  time  any of the  Rights  Certificates
     shall not have been  countersigned,  the Rights Agent may countersign  such
     Rights Certificates either in its prior name or in its changed name; and in
     all such cases such Rights  Certificates shall have the full force provided
     in the Rights Certificates and in this Agreement.


     Section 20. Duties of Rights Agent.  The Rights Agent undertakes the duties
                 ----------------------
and  obligations  imposed  by  this  Agreement  upon  the  following  terms  and
conditions,  by all of which the Company and the holders of Rights Certificates,
by their acceptance thereof, shall be bound:

          (a) The Rights Agent may consult with legal  counsel (who may be legal
     counsel for the Company), 

                                       77
<PAGE>

     and the opinion of such counsel  shall be full and  complete  authorization
     and  protection to the Rights Agent as to any action taken or omitted by it
     in good faith and in accordance with such opinion.

          (b) Whenever in the performance of its duties under this Agreement the
     Rights Agent shall deem it  necessary or desirable  that any fact or matter
     (including,  without  limitation,  the identity of any Acquiring Person and
     the  determination of Current Market Price) be proved or established by the
     Company  prior to taking or suffering  any action  hereunder,  such fact or
     matter  (unless other  evidence in respect  thereof be herein  specifically
     prescribed)  may be deemed to be  conclusively  proved and established by a
     certificate  signed by the Chairman of the Board,  the President,  any Vice
     President,  the Treasurer, any Assistant Treasurer, the Corporate Secretary
     or any  Assistant  Corporate  Secretary of the Company and delivered to the
     Rights  Agent;  and such  certificate  shall be full  authorization  to the
     Rights Agent for any action taken or suffered in good faith by it under the
     provisions of this Agreement in reliance upon such certificate.

                                       78
<PAGE>

          (c) The Rights Agent shall be liable  hereunder only for its own gross
     negligence, bad faith or willful misconduct.

          (d) The  Rights  Agent  shall not be liable for or by reason of any of
     the  statements of fact or recitals  contained in this  Agreement or in the
     Rights  Certificates  or be required  to verify the same  (except as to its
     countersignature on such Rights Certificates),  but all such statements and
     recitals are and shall be deemed to have been made by the Company only.

          (e) The Rights Agent shall not be under any  responsibility in respect
     of the validity of this  Agreement  or the  execution  and delivery  hereof
     (except the due execution  hereof by the Rights Agent) or in respect of the
     validity   or   execution   of   any   Rights   Certificate   (except   its
     countersignature  thereof);  nor shall it be responsible  for any breach by
     the Company of any covenant or condition  contained in this Agreement or in
     any Rights  Certificate;  nor shall it be  responsible  for any  adjustment
     required  under the  provisions  of  Section  11,  Section 13 or Section 24
     hereof  or  responsible  for the  manner,  method  or  amount  of any  such
     adjustment or the ascertaining of the existence of facts that would require
     any  such  adjustment  (except  with  respect  to the  

                                       79
<PAGE>

     exercise of Rights evidenced by Rights  Certificates after actual notice of
     any such  adjustment);  nor shall it by any act hereunder be deemed to make
     any  representation  or warranty as to the  authorization or reservation of
     any shares of Common Stock or Preferred Stock to be issued pursuant to this
     Agreement or any Rights  Certificate  or as to whether any shares of Common
     Stock or Preferred  Stock will, when so issued,  be validly  authorized and
     issued, fully paid and nonassessable.

          (f) The Company agrees that it will perform, execute,  acknowledge and
     deliver or cause to be performed, executed,  acknowledged and delivered all
     such further and other acts,  instruments  and assurances as may reasonably
     be required by the Rights Agent for the carrying out or  performing  by the
     Rights Agent of the provisions of this Agreement.

          (g) The  Rights  Agent is hereby  authorized  and  directed  to accept
     instructions  with respect to the performance of its duties  hereunder from
     the Chairman of the Board, the President, any Vice President, the Corporate
     Secretary,   any  Assistant  Corporate  Secretary,  the  Treasurer  or  any
     Assistant  Treasurer  of the  Company,  and to apply to such  officers  for
     advice or instructions  in connection with its duties,  and it shall not be
     liable

                                       80
<PAGE>
    
     for any action  taken or suffered to be taken by it in good faith in
     accordance with instructions of any such officer.

          (h)  The  Rights  Agent  and any  stockholder,  director,  officer  or
     employee of the Rights Agent may buy,  sell or deal in any of the Rights or
     other  securities  of the Company or become  pecuniarily  interested in any
     transaction  in which the Company may be  interested,  or contract  with or
     lend money to the Company or otherwise act as fully and freely as though it
     were not Rights Agent under this  Agreement.  Nothing herein shall preclude
     the Rights  Agent from acting in any other  capacity for the Company or for
     any other legal entity.

          (i) The Rights  Agent may  execute and  exercise  any of the rights or
     powers hereby vested in it or perform any duty  hereunder  either itself or
     by or through its  attorneys  or agents,  and the Rights Agent shall not be
     answerable or accountable  for any act,  default,  neglect or misconduct of
     any such attorneys or agents or for any loss to the Company  resulting from
     any such act, default, neglect or misconduct; provided, however, reasonable
     care was exercised in the selection and continued employment thereof.

                                       81
<PAGE>

          (j) No provision of this  Agreement  shall require the Rights Agent to
     expend or risk its own funds or otherwise incur any financial  liability in
     the  performance  of any of its duties  hereunder or in the exercise of its
     rights if there shall be reasonable grounds for believing that repayment of
     such funds or adequate  indemnification  against  such risk or liability is
     not reasonably assured to it.

          (k) If,  with  respect to any Rights  Certificate  surrendered  to the
     Rights Agent for exercise or transfer, the certificate attached to the form
     of  assignment  or form of  election to  purchase,  as the case may be, has
     either not been completed or indicates an affirmative  response to clause 1
     and/or 2 thereof,  the Rights Agent shall not take any further  action with
     respect to such  requested  exercise or transfer  without first  consulting
     with the Company.


     Section  21.  Change of Rights  Agent.  The Rights  Agent or any  successor
                   -----------------------
Rights Agent may resign and be discharged  from its duties under this  Agreement
upon  thirty (30) days'  notice in writing  mailed to the  Company,  and to each
transfer  agent of the  Common  Stock and  Preferred  Stock,  by  registered  or
certified mail, and, if such resignation  occurs after the Distribution Date, to

                                       82
<PAGE>

the  registered  holders of the Rights  Certificates  by  first-class  mail. The
Company may remove the Rights  Agent or any  successor  Rights Agent upon thirty
(30) days' notice in writing,  mailed to the Rights  Agent or  successor  Rights
Agent,  as the case may be, and to each  transfer  agent of the Common Stock and
Preferred  Stock,  by registered or certified  mail, and, if such removal occurs
after the  Distribution  Date,  to the  holders  of the Rights  Certificates  by
first-class  mail.  If the  Rights  Agent  shall  resign or be  removed or shall
otherwise become  incapable of acting,  the Company shall appoint a successor to
the Rights Agent.  If the Company shall fail to make such  appointment  within a
period of thirty (30) days after  giving  notice of such removal or after it has
been notified in writing of such  resignation  or incapacity by the resigning or
incapacitated  Rights Agent or by the holder of a Rights Certificate (who shall,
with such notice,  submit his Rights Certificate for inspection by the Company),
then any registered  holder of any Rights  Certificate may apply to any court of
competent  jurisdiction for the appointment of a new Rights Agent. Any successor
Rights Agent,  whether  appointed by the Company or by such a court,  shall be a
legal business entity  organized and doing business under the laws of the United

                                       83
<PAGE>

States or of the State of New York or the Commonwealth of  Massachusetts  (or of
any other state of the United  States so long as such entity is authorized to do
business as a banking  institution in the State of New York or the  Commonwealth
of Massachusetts),  in good standing,  having a principal office in the State of
New York or the  Commonwealth of  Massachusetts,  which is authorized under such
laws to  exercise  corporate  trust or stock  transfer or  shareholder  services
powers and which has at the time of its  appointment  as Rights Agent a combined
capital  and  surplus of at least  $50,000,000  or (b) an  affiliate  of a legal
business entity described in clause (a) of this sentence. After appointment, the
successor Rights Agent shall be vested with the same powers,  rights, duties and
responsibilities  as if it had been  originally  named as Rights  Agent  without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose.  Not later than the  effective  date of any such  appointment,  the
Company shall file notice thereof in writing with the  predecessor  Rights Agent
and each  transfer  agent of the Common Stock and the Preferred  Stock,  and, if
such 

                                       84
<PAGE>

appointment occurs after the Distribution Date, mail a notice thereof in writing
to the registered holders of the Rights Certificates. Failure to give any notice
provided  for in this  Section 21,  however,  or any defect  therein,  shall not
affect the  legality  or validity  of the  resignation  or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.


     Section 22. Issuance of New Rights Certificates. Notwithstanding any of the
                 -----------------------------------
provisions of this Agreement or of the Rights to the contrary,  the Company may,
at its option,  issue new Rights Certificates  evidencing Rights in such form as
may be approved by the Board of Directors to reflect any adjustment or change in
the Purchase Price and the number or kind or class of shares or other securities
or property  purchasable  under the Rights  Certificates made in accordance with
the provisions of this Agreement.  In addition,  in connection with the issuance
or sale of shares of Common Stock following the  Distribution  Date and prior to
the redemption or expiration of the Rights,  the Company (a) shall, with respect
to shares of Common  Stock so issued or sold  pursuant to the  exercise of stock
options or under any employee plan or arrangement,  granted or awarded as of 

                                       85
<PAGE>

the  Distribution  Date,  or  upon  the  exercise,  conversion  or  exchange  of
securities hereinafter issued by the Company, and (b) may, in any other case, if
deemed necessary or appropriate by the Board of Directors of the Company,  issue
Rights Certificates  representing the appropriate number of Rights in connection
with  such  issuance  or  sale;  provided,  however,  that  (i) no  such  Rights
                                 --------  -------  
Certificate  shall be issued if, and to the extent  that,  the Company  shall be
advised  by  counsel  that such  issuance  would  create a  significant  risk of
material  adverse  tax  consequences  to the  Company or the Person to whom such
Rights Certificate would be issued, and (ii) no such Rights Certificate shall be
issued if, and to the extent that,  appropriate  adjustment shall otherwise have
been made in lieu of the issuance thereof.


     Section 23. Redemption and Termination.
                 --------------------------

          (a) The Board of Directors  of the Company may, at its option,  at any
     time  prior to the  earlier  of (i) the  close  of  business  on the  tenth
     Business  Day  following  the  Stock  Acquisition  Date  (or,  if the Stock
     Acquisition Date shall have occurred prior to the Record Date, the close of
     business on the tenth Business Day following the Record Date),  or (ii) the
     Final  Expiration  Date,  redeem  all but not  less  than  all of the  then

                                       86
<PAGE>
     
     outstanding  Rights at a redemption price of $.01 per Right, as such amount
     may be appropriately adjusted to reflect any stock split, stock dividend or
     similar transaction  occurring after the date hereof (such redemption price
     being hereinafter referred to as the "Redemption  Price").  Notwithstanding
     anything contained in this Agreement to the contrary,  the Rights shall not
     be  exercisable  after the first  occurrence of a Section  11(a)(ii)  Event
     until such time as the Company's right of redemption hereunder has expired.
     The Company may, at its option, pay the Redemption Price in cash, shares of
     Common  Stock  (based on the Current  Market  Price,  as defined in Section
     11(d)(i)  hereof,  of the Common  Stock at the time of  redemption)  or any
     other form of consideration deemed appropriate by the Board of Directors.

          (b)  Immediately  upon the  action  of the Board of  Directors  of the
     Company ordering the redemption of the Rights, evidence of which shall have
     been filed with the Rights Agent and without any further action and without
     any notice,  the right to exercise the Rights will  terminate  and the only
     right  thereafter  of  the  holders  of  Rights  shall  be to  receive  the
     Redemption  Price for each Right so held.  Promptly after the action of the
     Board of Directors ordering the redemption of the Rights, the 

                                       87
<PAGE>

     Company  shall give notice of such  redemption  to the Rights Agent and the
     holders of the then  outstanding  Rights by mailing such notice to all such
     holders at each holder's last address as it appears upon the registry books
     of the Rights Agent or,  prior to the  Distribution  Date,  on the registry
     books of the  transfer  agent for the Common  Stock.  Any  notice  which is
     mailed in the manner herein provided shall be deemed given,  whether or not
     the holder  receives the notice.  Each such notice of redemption will state
     the method by which the payment of the Redemption Price will be made.

          (c)  Notwithstanding  the  provisions of Section 23(a) hereof,  in the
     event that a majority of the Board of  Directors  of the Company is elected
     by  stockholder  action by  written  consent,  or is  comprised  of persons
     elected at a meeting of stockholders who were not nominated by the Board of
     Directors of the Company in office immediately prior to such meeting,  then
     for  a  period  of  one  hundred  and  eighty  (180)  days   following  the
     effectiveness  of such  election  the Rights  shall not be redeemed if such
     redemption is  reasonably  likely to have the purpose or effect of allowing
     any Person to become an  Acquiring  Person or  otherwise  facilitating  the
     occurrence 

                                       88
<PAGE>

     of a Triggering Event or a transaction with an Acquiring Person.


     Section 24. Exchange.
                 --------

          (a) The Board of Directors  of the Company may, at its option,  at any
     time after any Person becomes an Acquiring Person,  exchange all or part of
     the then outstanding and exercisable Rights (which shall not include Rights
     that have become void  pursuant to the  provisions  of Section 7(e) hereof)
     for  Common  Stock at an  exchange  ratio of one share of Common  Stock per
     Right, appropriately adjusted to reflect any stock split, stock dividend or
     similar  transaction  occurring  after the date hereof (such exchange ratio
     being hereinafter referred to as the "Exchange Ratio"). Notwithstanding the
     foregoing,  the Board of Directors of the Company shall not be empowered to
     effect such  exchange at any time after any Person (other than the Company,
     any Subsidiary of the Company,  any employee benefit plan of the Company or
     any such Subsidiary,  or any entity holding Common Stock for or pursuant to
     the terms of any such plan), together with all Affiliates and Associates of
     such  Person,  becomes  the  Beneficial  Owner of 50% or more of the Common
     Stock then outstanding.

                                       89
<PAGE>

          (b)  Immediately  upon the  action  of the Board of  Directors  of the
     Company  ordering the exchange of any Rights  pursuant to subsection (a) of
     this Section 24 and without any further action and without any notice,  the
     right to exercise such Rights shall terminate and the only right thereafter
     of a holder of such  Rights  shall be to receive  that  number of shares of
     Common  Stock  equal  to the  number  of such  Rights  held by such  holder
     multiplied by the Exchange  Ratio.  The Company shall  promptly give public
     notice of any such exchange;  provided,  however, that the failure to give,
     or any defect  in,  such  notice  shall not  affect  the  validity  of such
     exchange.  The Company promptly shall mail a notice of any such exchange to
     all of the  holders of such Rights at their last  addresses  as they appear
     upon the registry books of the Rights Agent.  Any notice which is mailed in
     the manner herein provided shall be deemed given, whether or not the holder
     receives the notice.  Each such notice of exchange will state the method by
     which the exchange of the Common Stock for Rights will be effected  and, in
     the event of any  partial  exchange,  the  number of Rights  which  will be
     exchanged.  Any partial  exchange  shall be effected  pro rata based on the
     number of Rights  (other than Rights 

                                       90
<PAGE>

     which have become void  pursuant to the  provisions of Section 7(e) hereof)
     held by each holder of Rights.

          (c) In any exchange  pursuant to this Section 24, the Company,  at its
     option, may substitute  Preferred Stock (or Equivalent  Preferred Stock, as
     such term is defined  in  paragraph  (b) of  Section 11 hereof)  for Common
     Stock  exchangeable for Rights, at the initial rate of one two-hundredth of
     a share of Preferred Stock (or Equivalent  Preferred  Stock) for each share
     of Common Stock, as appropriately  adjusted to reflect stock splits,  stock
     dividends and other similar transactions after the date hereof.

          (d) In the event that there shall not be  sufficient  shares of Common
     Stock issued but not  outstanding  or authorized but unissued to permit any
     exchange of Rights as  contemplated in accordance with this Section 24, the
     shares  of  Company  shall  take all such  action  as may be  necessary  to
     authorize  additional  shares of Common Stock for issuance upon exchange of
     the Rights.

          (e) The Company shall not be required to issue  fractions of shares of
     Common Stock or to distribute certificates which evidence fractional shares
     of Common Stock. In lieu of such fractional  shares of Common Stock,  there
     shall be paid to the  registered  

                                       91
<PAGE>

     holders of the Rights  Certificates  with  regard to which such  fractional
     shares of Common Stock would otherwise be issuable, an amount in cash equal
     to the same fraction of the current market value of a whole share of Common
     Stock. For the purposes of this subsection (e), the current market value of
     a whole  share of Common  Stock  shall be the  closing  price of a share of
     Common  Stock (as  determined  pursuant  to the second  sentence of Section
     11(d)(i)  hereof)  for the  Trading  Day  immediately  prior to the date of
     exchange pursuant to this Section 24.

     
     Section 25. Notice of Certain Events.
                 ------------------------

          (a) In  case  the  Company  shall  propose,  at  any  time  after  the
     Distribution Date, (i) to pay any dividend payable in stock of any class to
     the holders of  Preferred  Stock or to make any other  distribution  to the
     holders of Preferred  Stock (other than a regular  quarterly  cash dividend
     out of earnings or retained  earnings of the Company),  or (ii) to offer to
     the holders of Preferred  Stock  rights or warrants to subscribe  for or to
     purchase any additional shares of Preferred Stock or shares of stock of any
     class or any other  securities,  rights or options,  or (iii) to effect any
     reclassification  of its  Preferred  Stock  (other than a  reclassification
     involving only the subdivision of outstanding  shares 

                                       92
<PAGE>

     of Preferred  Stock), or (iv) to effect any consolidation or merger into or
     with  any  other  Person  (other  than a  Subsidiary  of the  Company  in a
     transaction  which  complies with Section 11(o)  hereof),  or to effect any
     sale or other  transfer  (or to permit one or more of its  Subsidiaries  to
     effect  any sale or other  transfer),  in one  transaction  or a series  of
     related transactions,  of more than 50% of the assets, cash flow or earning
     power of the Company and its  Subsidiaries  (taken as a whole) to any other
     Person or Persons (other than the Company and/or any of its Subsidiaries in
     one or more transactions each of which complies with Section 11(o) hereof),
     or (v) to effect the liquidation, dissolution or winding up of the Company,
     then, in each such case,  the Company shall give to each holder of a Rights
     Certificate,  to the extent  feasible  and in  accordance  with  Section 26
     hereof,  a notice of such proposed  action,  which shall specify the record
     date for the  purposes of such stock  dividend,  distribution  of rights or
     warrants,  or the  date  on  which  such  reclassification,  consolidation,
     merger, sale, transfer, liquidation,  dissolution, or winding up is to take
     place and the date of participation therein by the holders of the shares of
     Preferred  Stock, if any such date is to be fixed, and such notice shall be
     so given in 

                                       93
<PAGE>

     the case of any action  covered by clause (i) or (ii) above at least twenty
     (20) days prior to the record date for determining holders of the shares of
     Preferred  Stock for purposes of such  action,  and in the case of any such
     other action,  at least twenty (20) days prior to the date of the taking of
     such proposed action or the date of participation therein by the holders of
     the shares of Preferred Stock whichever shall be the earlier.

          (b) In case any of the events set forth in  Section  11(a)(ii)  hereof
     shall  occur,  then,  in any such case,  (i) the  Company  shall as soon as
     practicable thereafter give to each holder of a Rights Certificate,  to the
     extent feasible and in accordance  with Section 26 hereof,  a notice of the
     occurrence   of  such  event,   which  shall  specify  the  event  and  the
     consequences  of the event to holders  of Rights  under  Section  11(a)(ii)
     hereof,  and (ii) all  references in the  preceding  paragraph to Preferred
     Stock  shall be deemed  thereafter  to refer to  Common  Stock  and/or,  if
     appropriate, other securities.


     Section 26. Notices.  Notices or demands authorized by this Agreement to be
                 -------
given or made by the Rights Agent or by the holder of any Rights  Certificate to
or on the Company  shall be  sufficiently  given or made if sent by  first-class
mail,  postage prepaid,  addressed 

                                       94
<PAGE>

(until another address is filed in writing by the Rights Agent with the Company)
as follows:

                  HSB Group, Inc.
                  One State Street
                  Hartford, Connecticut 06102
                  Attention:  Corporate Secretary


Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement  to be given or made by the  Company  or by the  holder of any  Rights
Certificate  to or on the Rights  Agent shall be  sufficiently  given or made if
sent by first-class mail,  postage prepaid,  addressed (until another address is
filed in writing by the Rights Agent with the Company) as follows:


                  BankBoston, N.A.
                  c/o Boston Equiserve Limited Partnership
                  150 Royall Street
                  Canton, Massachusetts 02021
                  Attention:  Client Administration


                  Notices or demands authorized by this Agreement to be given or
made by the Company or the Rights Agent to the holder of any Rights  Certificate
(or,  if  prior  to  the  Distribution  Date,  to  the  holder  of  certificates
representing shares of Common Stock) shall be sufficiently given or made if sent
by first-class mail, postage pre-

                                       95
<PAGE>

paid,  addressed  to such  holder at the  address of such holder as shown on the
registry books of the Company.


     Section 27. Supplements and Amendments. Prior to the Distribution Date, and
                 --------------------------
subject to the last  sentence  of this  Section  27, the  Company and the Rights
Agent shall,  if the Company so directs,  supplement  or amend any  provision of
this Agreement without the approval of any holders of certificates  representing
shares of Common Stock.  From and after the  Distribution  Date, the Company and
the Rights  Agent  shall,  if the Company so directs,  supplement  or amend this
Agreement  without the approval of any holders of Rights  Certificates  in order
(i) to cure any ambiguity, (ii) to correct or supplement any provision contained
herein which may be defective or inconsistent with any other provisions  herein,
(iii) to shorten or  lengthen  any time period  hereunder,  or (iv) to change or
supplement  the  provisions  hereunder  in any manner which the Company may deem
necessary or desirable and which shall not adversely affect the interests of the
holders of Rights  Certificates  (other than an Acquiring Person or an Affiliate
or  Associate of an  Acquiring  Person);  provided,  this  Agreement  may not be
                                          --------
supplemented  or amended to  lengthen  any time  period  hereunder,  pursuant to
clause (iii) of this sentence, (A) a time period 

                                       96
<PAGE>

relating  to when the Rights may be  redeemed at such time as the Rights are not
then redeemable, or (B) any other time period unless such lengthening is for the
purpose of  protecting,  enhancing  or  clarifying  the  rights  of,  and/or the
benefits to, the holders of Rights.  Upon the delivery of a certificate  from an
appropriate  officer of the Company which states that the proposed supplement or
amendment is in  compliance  with the terms of this Section 27, the Rights Agent
shall execute such supplement or amendment.  Prior to the Distribution Date, the
interests of the holders of Rights shall be deemed coincident with the interests
of the holders of Common Stock. Notwithstanding anything herein to the contrary,
this Agreement may not be amended at a time when the Rights are not redeemable.


     Section 28. Successors.  All the covenants and provisions of this Agreement
                 ----------
by or for the benefit of the Company or the Rights Agent shall bind and inure to
the benefit of their respective successors and assigns hereunder.


     Section 29. Determinations and Actions by the Board of Directors,  etc. For
                 -----------------------------------------------------------
all  purposes  of this  Agreement,  any  calculation  of the number of shares of
Common Stock  outstanding  at any  particular  time,  including  for 

                                       97
<PAGE>

purposes of determining the particular  percentage of such outstanding shares of
Common  Stock of which any  Person  is the  Beneficial  Owner,  shall be made in
accordance  with the last sentence of Rule  13d-3(d)(1)(i)  of the General Rules
and  Regulations  under the Exchange  Act. The Board of Directors of the Company
shall have the exclusive power and authority to administer this Agreement and to
exercise  all  rights  and  powers  specifically  granted to the Board or to the
Company,  or as may be  necessary or  advisable  in the  administration  of this
Agreement,  including,  without limitation, the right and power to (i) interpret
the  provisions  of this  Agreement,  and (ii)  make all  determinations  deemed
necessary or advisable for the  administration  of this  Agreement  (including a
determination to redeem or not redeem the Rights or to amend the Agreement). All
such actions,  calculations,  interpretations and determinations (including, for
purposes of clause (y) below, all omissions with respect to the foregoing) which
are done or made by the Board in good faith, shall (x) be final,  conclusive and
binding on the  Company,  the Rights  Agent,  the  holders of the Rights and all
other  parties,  and (y) not subject the Board,  or any of the  directors on the
Board to any liability to the holders of the Rights.

                                       98
<PAGE>


     Section 30. Benefits of this Agreement.  Nothing in this Agreement shall be
                 --------------------------
construed to give to any Person other than the Company, the Rights Agent and the
registered  holders of the Rights  Certificates  (and, prior to the Distribution
Date,  registered  holders of the Common  Stock) any legal or  equitable  right,
remedy or claim under this  Agreement;  but this Agreement shall be for the sole
and  exclusive  benefit  of the  Company,  the Rights  Agent and the  registered
holders  of the  Rights  Certificates  (and,  prior  to the  Distribution  Date,
registered holders of the Common Stock).


     Section 31. Severability.  If any term, provision,  covenant or restriction
                 ------------
of this  Agreement  is  held  by a court  of  competent  jurisdiction  or  other
authority  to be invalid,  void or  unenforceable,  the  remainder of the terms,
provisions,  covenants and  restrictions  of this Agreement shall remain in full
force and  effect  and shall in no way be  affected,  impaired  or  invalidated;
provided,  however,  that  notwithstanding  anything  in this  Agreement  to the
- --------   -------
contrary, if any such term,  provision,  covenant or restriction is held by such
court  or  authority  to be  invalid,  void or  unenforceable  and the  Board of
Directors of the Company determines in its good faith judgment that severing the
invalid  language  from this  Agreement  would  

                                       99
<PAGE>

adversely  affect  the  purpose  or  effect  of this  Agreement,  the  right  of
redemption  set forth in Section  23 hereof  shall be  reinstated  and shall not
expire until the close of business on the tenth  Business Day following the date
of such determination by the Board of Directors. Without limiting the foregoing,
if any provision  requiring a specific  group of Directors of the Company to act
is held to by any  court of  competent  jurisdiction  or other  authority  to be
invalid,  void or unenforceable,  such  determination  shall then be made by the
Board of  Directors of the Company in  accordance  with  applicable  law and the
Company's Amended and Restated Certificate of Incorporation and By-laws.


     Section  32.  Governing  Law.  This  Agreement,  each Right and each Rights
                   --------------
Certificate  issued  hereunder  shall be deemed to be a contract  made under the
laws of the State of  Connecticut  and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts made
and to be performed entirely within such State.


     Section 33.  Counterparts.  This Agreement may be executed in any number of
                  ------------
counterparts and each of such  counterparts  shall for all purposes be deemed to
be 

                                      100
<PAGE>

an original,  and all such counterparts shall together constitute but one and
the same instrument.


     Section  34.  Descriptive  Headings.  Descriptive  headings  of the several
                   ---------------------
sections of this  Agreement  are  inserted  for  convenience  only and shall not
control or affect the meaning or construction of any of the provisions hereof.


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement  to be duly  executed,  and  their  respective  corporate  seals to be
hereunto affixed and attested, all as of the day and year first above written.



Attest:                                           HSB GROUP, INC.


By /s/ Roberta A. O'Brien                         By /s/ R. Kevin Price 
Name: Roberta A. O'Brien                          Name:  R. Kevin Price
Title: Senior Vice President                      Title: Senior Vice 
                                                         President and 
                                                         Corporate Secretary


Attest:                                           BANKBOSTON, N.A.


By    /s/ Angela D. Beckner                        By /s/ Joshua P. McGinn
Name:  Angela D. Beckner                           Name:  Joshua P. McGinn
Title: Account Manager                             Title: Senior Account Manager




                                      101
<PAGE>





                                                          Exhibit A

                          [Form of Rights Certificate]


Certificate No. R-                                        ________ Rights


NOT  EXERCISABLE  AFTER  NOVEMBER 28, 2008 UNLESS  EXTENDED PRIOR THERETO BY THE
BOARD OF DIRECTORS OR EARLIER IF REDEEMED BY THE COMPANY. THE RIGHTS ARE SUBJECT
TO REDEMPTION,  AT THE OPTION OF THE COMPANY, AT $.01 PER RIGHT ON THE TERMS SET
FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES,  RIGHTS BENEFICIALLY
OWNED BY AN ACQUIRING  PERSON (AS SUCH TERM IS DEFINED IN THE RIGHTS  AGREEMENT)
AND ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID.


                               Rights Certificate

                                 HSB GROUP, INC.

                                                
     This certifies that  ________________________  , or registered  assigns, is
the  registered  owner of the  number of Rights set forth  above,  each of which
entitles the owner thereof,  subject to the terms,  provisions and conditions of
the Rights  Agreement,  dated as of November 28, 1998 (the "Rights  Agreement"),
between  HSB  Group,  Inc.,  a  Connecticut  corporation  (the  "Company"),  and
BankBoston,  N.A.,  a national  banking  association  (the "Rights  Agent"),  to
purchase  from the  Company  at any time  prior to 5:00  P.M.  (Boston  time) on
November 28, 2008 (unless  such date is extended  prior  thereto by the Board
<PAGE>

of Directors) at the office or offices of the Rights Agent  designated  for such
purpose,  or its successors as Rights Agent, one  two-hundredth of a fully paid,
non-assessable  share of  Series A Junior  Participating  Preferred  Stock  (the
"Preferred  Stock")  of the  Company,  at a  purchase  price of  $_____  per one
two-hundredth of a share (the "Purchase Price"), upon presentation and surrender
of this Rights  Certificate  with the Form of  Election to Purchase  and related
Certificate  duly  executed.  The  number of  Rights  evidenced  by this  Rights
Certificate  (and the  number of shares  which may be  purchased  upon  exercise
thereof) set forth above,  and the Purchase Price per share set forth above, are
the number and Purchase  Price as of November 28, 1998,  based on the  Preferred
Stock as  constituted  at such date.  The Company  reserves the right to require
prior to the  occurrence  of a Triggering  Event (as such term is defined in the
Rights Agreement) that a number of Rights be exercised so that only whole shares
of Preferred Stock will be issued.

     Upon the occurrence of a Section  11(a)(ii)  Event (as such term is defined
in the Rights Agreement), if the Rights evidenced by this Rights Certificate are
beneficially  owned by (i) an  Acquiring  Person or an Affiliate or Associate of
any such Acquiring  Person (as 

                                       2
<PAGE>

such terms are defined in the Rights  Agreement),  (ii) a transferee of any such
Acquiring Person,  Associate or Affiliate,  or (iii) under certain circumstances
specified  in the Rights  Agreement,  a transferee  of a person who,  after such
transfer,  became an  Acquiring  Person,  or an  Affiliate  or  Associate  of an
Acquiring  Person,  such Rights shall become null and void and no holder  hereof
shall have any right with  respect to such Rights from and after the  occurrence
of such Section 11(a)(ii) Event.

     As provided in the Rights Agreement,  the Purchase Price and the number and
kind of shares of Preferred  Stock or other  securities,  which may be purchased
upon the exercise of the Rights evidenced by this Rights Certificate are subject
to modification  and adjustment upon the happening of certain events,  including
Triggering Events.

     This  Rights  Certificate  is subject to all of the terms,  provisions  and
conditions of the Rights Agreement,  which terms,  provisions and conditions are
hereby  incorporated  herein by  reference  and made a part  hereof and to which
Rights Agreement  reference is hereby made for a full description of the rights,
limitations  of rights,  obligations,  duties and  immunities  hereunder  of the
Rights  Agent,  the Company and the  holders of the 

                                       3
<PAGE>

Rights   Certificates,   which  limitations  of  rights  include  the  temporary
suspension of the exercisability of such Rights under the specific circumstances
set forth in the Rights Agreement. Copies of the Rights Agreement are on file at
the  above-mentioned  office of the  Rights  Agent and are also  available  upon
written request to the Rights Agent.

     This Rights Certificate,  with or without other Rights  Certificates,  upon
surrender at the principal  office or offices of the Rights Agent designated for
such  purpose,  may be  exchanged  for  another  Rights  Certificate  or  Rights
Certificates  of like tenor and date evidencing  Rights  entitling the holder to
purchase a like aggregate number of one  two-hundredths  of a share of Preferred
Stock as the Rights evidenced by the Rights  Certificate or Rights  Certificates
surrendered  shall  have  entitled  such  holder  to  purchase.  If this  Rights
Certificate  shall be exercised in part, the holder shall be entitled to receive
upon surrender hereof another Rights Certificate or Rights  Certificates for the
number of whole Rights not exercised.

     Subject to the provisions of the Rights Agreement,  the Rights evidenced by
this  Certificate  may be redeemed by the Company at its option at a  redemption

                                       4
<PAGE>

price  of $.01  per  Right at any time  prior  to the  earlier  of the  close of
business on (i) the tenth Business Day following the Stock  Acquisition Date (as
such time period may be extended pursuant to the Rights Agreement), and (ii) the
Final Expiration Date. The foregoing  notwithstanding,  the Rights generally may
not be  redeemed  for one  hundred  eighty  (180) days  following  a change in a
majority of the Board as a result of a proxy contest. In addition, under certain
circumstances following the Stock Acquisition Date, the Rights may be exchanged,
in whole or in part,  for shares of the  Common  Stock,  or shares of  preferred
stock of the Company  having  essentially  the same value or economic  rights as
such  shares.  Immediately  upon the  action  of the Board of  Directors  of the
Company  authorizing  any such  exchange,  and without any further action or any
notice,  the Rights  (other than Rights which are not subject to such  exchange)
will  terminate  and the Rights will only  enable  holders to receive the shares
issuable upon such exchange.

     No fractional shares of Preferred Stock will be issued upon the exercise of
any Right or Rights  evidenced  hereby (other than fractions  which are integral
multiples of one two-hundredth of a share of Preferred Stock,  which may, at the
election of the  Company,  be  evidenced by  

                                       5
<PAGE>

depositary  receipts),  but in lieu  thereof  a cash  payment  will be made,  as
provided in the Rights Agreement. The Company, at its election, may require that
a number of Rights be exercised  so that only whole  shares of  Preferred  Stock
would be issued.

     No holder of this Rights  Certificate  shall be entitled to vote or receive
dividends or be deemed for any purpose the holder of shares of  Preferred  Stock
or of any other  securities  of the Company which may at any time be issuable on
the exercise  hereof,  nor shall anything  contained in the Rights  Agreement or
herein be construed to confer upon the holder hereof, as such, any of the rights
of a  stockholder  of the  Company  or any  right  to vote for the  election  of
directors or upon any matter  submitted to stockholders at any meeting  thereof,
or to give consent to or withhold  consent  from any  corporate  action,  or, to
receive notice of meetings or other actions  affecting  stockholders  (except as
provided  in the Rights  Agreement),  or to receive  dividends  or  subscription
rights,  or  otherwise,  until  the  Right or Rights  evidenced  by this  Rights
Certificate shall have been exercised as provided in the Rights Agreement.

                                       6
<PAGE>

     This Rights  Certificate  shall not be valid or obligatory  for any purpose
until it shall have been countersigned by the Rights Agent.




                                       7
<PAGE>




     WITNESS the facsimile  signature of the proper  officers of the Company and
its corporate seal. Dated as of _________ __, ____



ATTEST:                                              HSB GROUP, INC.



____________________________                 By  ____________________________
Corporate Secretary                              Title:


Countersigned:

BANKBOSTON, N.A.


By  ________________________
   Authorized Signature




                                       8
<PAGE>





                  [Form of Reverse Side of Rights Certificate]



                               FORM OF ASSIGNMENT
                               ------------------

                (To be executed by the registered holder if such
               holder desires to transfer the Rights Certificate.)


     FOR VALUE RECEIVED __________________________________ hereby sells, assigns
and        transfers        unto         _______________________________________
________________________________________________________________________________
                  (Please print name and address of transferee)
________________________________________________________________________________
this Rights  Certificate,  together with all right,  title and interest therein,
and does hereby irrevocably constitute and appoint __________________  Attorney,
to  transfer  the within  Rights  Certificate  on the books of the within  named
Company, with full power of substitution.
Dated: __________________, _____



                                                _______________________________
                                                          Signature


Signature Guaranteed:



                                   Certificate
                                   -----------

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1) this  Rights  Certificate  [ ] is [ ] is not being sold,  assigned  and
transferred by or on behalf of a 
<PAGE>

Person who is or was an  Acquiring  Person or an  Affiliate  or Associate of any
such  Acquiring  Person  (as such  terms  are  defined  pursuant  to the  Rights
Agreement);

     (2) after due inquiry and to the best knowledge of the undersigned,  it [ ]
did [ ] did not acquire the Rights evidenced by this Rights Certificate from any
Person who is, was or subsequently became an Acquiring Person or an Affiliate or
Associate of an Acquiring Person.


Dated: _______________, _____                          _________________________
                                                              Signature

Signature Guaranteed:


<PAGE>
                                     NOTICE


                  The signature to the foregoing Assignment and Certificate must
correspond  to the name as written upon the face of this Rights  Certificate  in
every particular, without alteration or enlargement or any change whatsoever.


<PAGE>


                          FORM OF ELECTION TO PURCHASE

              (To be executed if holder desires to exercise Rights
                     represented by the Rights Certificate.)


To:  _____________CORPORATION:

     The undersigned  hereby  irrevocably  elects to exercise  __________ Rights
represented by this Rights Certificate to purchase the shares of Preferred Stock
issuable  upon the  exercise  of the  Rights (or such  other  securities  of the
Company or of any other  person  which may be issuable  upon the exercise of the
Rights) and requests that  certificates for such shares be issued in the name of
and delivered to:


Please insert social security
or other identifying number

________________________________________________________________________________
                         (Please print name and address)

________________________________________________________________________________



     If such  number of Rights  shall not be all the  Rights  evidenced  by this
Rights  Certificate,  a new Rights  Certificate  for the  balance of such Rights
shall be registered in the name of and delivered to:
<PAGE>


Please insert social security
or other identifying number

________________________________________________________________________________
                         (Please print name and address)

________________________________________________________________________________



Dated:  _______________, _____



                                             __________________________________
                                                     Signature



Signature Guaranteed:



                                   Certificate
                                   -----------

     The undersigned hereby certifies by checking the appropriate boxes that:

     (1) the Rights  evidenced  by this Rights  Certificate  [ ] are [ ] are not
being exercised by or on behalf of a Person who is or was an Acquiring Person or
an  Affiliate  or  Associate  of any such  Acquiring  Person  (as such terms are
defined pursuant to the Rights Agreement);

     (2) after due inquiry and to the best knowledge of the undersigned,  it [ ]
did [ ] did not acquire the 
<PAGE>

Rights  evidenced  by this  Rights  Certificate  from any  Person who is, was or
became an Acquiring Person or an Affiliate or Associate of an Acquiring Person.


Dated: ______________, _____                   _________________________________
                                                       Signature



Signature Guaranteed:



<PAGE>

                                     NOTICE
                                     ------


                  The  signature  to the  foregoing  Election  to  Purchase  and
Certificate  must correspond to the name as written upon the face of this Rights
Certificate in every particular, without alteration or enlargement or any change
whatsoever.



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