SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  SCHEDULE 13D
           Under the Securities Exchange Act of 1934 (Amendment No. 2)

                                  OPTIBASE LTD.
                                  -------------
                                (Name of Issuer)

                                 Ordinary Shares
                                 ---------------
                         (Title of Class of Securities)

                                    M7524R108
                                    ---------
                                 (CUSIP Number)

                             Linda C. Williams, Esq.
                             Pillsbury Winthrop LLP
                                50 Fremont Street
                             San Francisco, CA 94105
                            Telephone: (415) 983-7334
                            -------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                January 15, 2002
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of ss.ss. 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the
following box [ ]. NOTE:  Schedules filed in paper format shall include a signed
original  and five copies of the  schedule,  including  all  exhibits.  See Rule
240.13d-7 for other parties to whom copies are to be sent.
*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 (the "Act") or otherwise  subject to the liabilities of that section of the
Act but shall be subject to all other  provisions of the Act  (however,  see the
Notes).

                               Page 1 of 7 Pages



                                                                                                

1.         NAMES OF REPORTING PERSONS:                                                                   JOHN KROOSS
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS                                                Not applicable
           (entities only):
--------------------------------------------------------------------------------------------------------------------

2.         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                                                   (a)/_/
                                                                                                              (b)/X/
--------------------------------------------------------------------------------------------------------------------

3.         SEC USE ONLY

--------------------------------------------------------------------------------------------------------------------
                                                                                                                  OO
4.         SOURCE OF FUNDS:

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

5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
           REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)

--------------------------------------------------------------------------------------------------------------------
                                                                                                        U.S. CITIZEN
6.         CITIZENSHIP OR PLACE OF ORGANIZATION:

--------------------------------------------------------------------------------------------------------------------
                                                                                                             693,438
                               7.     SOLE VOTING POWER:
          NUMBER OF
                               -------------------------------------------------------------------------------------
           SHARES              8.     SHARED VOTING POWER:
        BENEFICIALLY
                               -------------------------------------------------------------------------------------
        OWNED BY EACH          9.     SOLE DISPOSITIVE POWER:                                                693,438
          REPORTING
                               -------------------------------------------------------------------------------------
         PERSON WITH           10.    SHARED DISPOSITIVE POWER:

--------------------------------------------------------------------------------------------------------------------
                                                                                                             693,438
11.        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
           REPORTING PERSON:
--------------------------------------------------------------------------------------------------------------------

12.        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)
           EXCLUDES CERTAIN SHARES                                                                               /_/

--------------------------------------------------------------------------------------------------------------------
                                                                                                                5.5%
13.        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
           (11):

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

14.        TYPE OF REPORTING PERSON:                                                                              IN

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


                               Page 2 of 7 Pages


ITEM 1.     Security and Issuer.
            -------------------

            This Statement  relates to ordinary  shares,  par value NIS 0.13 per
            share  ("Ordinary  Shares"),  of Optibase Ltd. (the  "Issuer").  The
            address of the  Issuer's  principal  executive  offices is 7 Shenkar
            St., P.O. Box 2170, Herzliya, 46210 Israel.

ITEM 2.     Identity and Background.
            -----------------------

            This Statement is being filed by John Krooss,  an individual  ("John
            Krooss" or "Mr.  Krooss").  His residential  address is 2868 Vallejo
            Street,  San  Francisco,   California  94123.  Mr.  Krooss  is  self
            employed. Mr. Krooss is a citizen of the United States of America.

            During the past five years, Mr. Krooss has not been (i) convicted in
            any criminal proceeding;  or (ii) been party to any civil proceeding
            of a judicial or administrative body of competent  jurisdiction as a
            result of which Mr. Krooss was or is subject to any judgment, decree
            or final order  enjoining  future  violations  of, or prohibiting or
            mandating activities subject to, federal or state securities laws or
            finding any violation with respect to such laws.

ITEM 3.     Source and Amount of Funds or Other Consideration.
            -------------------------------------------------

            This  Amendment  No. 2 to the Schedule 13D is being filed to clarify
            the number of Ordinary  Shares of Issuer which are  attributable  to
            Mr.  Krooss and the number of Ordinary  Shares for which Mr.  Krooss
            disclaims beneficial ownership.

            Pursuant to the  Agreement and Plan of  Reorganization,  dated as of
            December  4, 2000 (the  "Merger  Agreement"),  by and among  Issuer,
            Vodka  Acquisition  Corp.  ("Sub"),  a  Delaware  corporation  and a
            wholly-owned  subsidiary  of  Optibase  Inc.,  which  in  turn  is a
            wholly-owned  subsidiary  of Issuer,  Viewgraphics  Incorporated,  a
            California S corporation (the "Company"), John Krooss and the Krooss
            2000  Children's  Trust,  a California  trust for the benefit of the
            John  Krooss'  children,  of  which  Anne  Libbin  is  trustee  (the
            "Children's Trusts"),  the Sub was merged with and into the Company,
            the  separate  corporate  existence  of Sub ceased  and the  Company
            continues  as  the  surviving  corporation  and  as  a  wholly-owned
            subsidiary of Optibase Inc. (the "Merger").  On December 4, 2000, as
            a result of the  Merger,  Mr.  Krooss  received  a total of  302,378
            Ordinary Shares. In addition,  1,036,421 Ordinary Shares were placed
            in escrow,  which Mr.  Krooss  could vote,  but were  subject to the
            terms of the Escrow  Agreement,  dated as of  December  4, 2000,  as
            amended  March 27,  2001,  by and among  Issuer,  John  Krooss,  the
            Company and American Stock Transfer & Trust Company, as escrow agent
            and  transfer  agent  (the  "Escrow  Agreement").  Of the  1,036,421
            Ordinary Shares placed in escrow,  104,968 shares were  attributable
            to the Children's  Trusts,  an aggregate of 289,108  Ordinary Shares
            were attributable to former shareholders of the Company (the "Former
            Shareholders")  and 642,345 shares were  attributable to Mr. Krooss.
            Mr. Krooss  disclaims  beneficial  ownership of the 394,076 Ordinary

                               Page 3 of 7 Pages



            Shares placed in escrow for the benefit of the Children's Trusts and
            the Former Shareholders.

            On January 15, 2002, in settlement  of Merger  related  claims under
            the Escrow  Agreement,  Mr. Krooss forfeited his contingent right to
            receive  251,285  Ordinary  Shares and 322,857  Ordinary Shares were
            released  from escrow to Mr.  Krooss.  The  Ordinary  Shares held in
            escrow  for the  benefit  of the  Children's  Trusts  and the Former
            Shareholders  were either  forfeited in settlement of Merger related
            claims  under the Escrow  Agreement  or released  to the  Children's
            Trusts  and the  Former  Shareholders  pursuant  to the terms of the
            Escrow Agreement.  Mr. Krooss disclaims  beneficial ownership of the
            Ordinary Shares  received by the Children's  Trusts and the Ordinary
            Shares received by the Former  Shareholders.  68,203 Ordinary Shares
            remain in escrow,  which Mr. Krooss can vote, but are subject to the
            terms of the Escrow Agreement.

            Mr. Krooss is a Director of the Issuer.

ITEM 4.     Purpose of the Transaction.
            --------------------------

            Mr.  Krooss  will  hold the  Ordinary  Shares as an  investment.  In
            addition to the  provisions  of the Escrow  Agreement,  the Ordinary
            Shares were issued pursuant to an exemption under the Securities Act
            of 1933, and therefore are subject to  restrictions on public resale
            absent  registration.  Depending on Mr. Krooss' evaluation of market
            conditions,  market  price,  alternative  investment  opportunities,
            liquidity needs and other factors, Mr. Krooss will from time to time
            explore  opportunities  for  liquidating  all  or a  portion  of the
            Ordinary Shares, subject to the limitations described above, through
            one or more  sales  pursuant  to  public  or  private  offerings  or
            otherwise.  In such event,  Mr.  Krooss may determine to retain some
            portion of the Ordinary Shares as an investment.

ITEM 5.     Interest in Securities of the Issuer.
            ------------------------------------

            The information  contained in Item 4 is incorporated  herein by this
            reference.

            (a)   Number of Shares Beneficially Owned:           See Item 4

                  Right to Acquire:

                  Percent of Class:

            (b)   Sole Power to Vote, Direct the Vote of,        See Item 4
                  or Dispose of Shares:

            (c)   Recent Transactions:                           Not applicable

                               Page 4 of 7 Pages


            (d)   Rights with Respect to Dividends or            Not applicable
                  Sales Proceeds:

            (e)   Date of Cessation of Five Percent              Not applicable
                  Beneficial Ownership:

ITEM 6.     Contracts, Arrangements, Understandings or Relationships with
            -------------------------------------------------------------
            Respect to Securities of the Issuer.
            -----------------------------------

            The  information  contained  in  Item 4 is  incorporated  herein  by
            reference.  Exhibits 1 and 2 set forth in the Merger  Agreement  and
            the Escrow Agreement.

ITEM 7.     Materials to be Filed as Exhibits.
            ---------------------------------

            Exhibit 1*     Agreement and Plan of Reorganization

            Exhibit 2*     Escrow Agreement


*Previously filed

                               Page 5 of 7 Pages




SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated as of March 15, 2002



                                                /s/ John R. Krooss
                                     ------------------------------------------
                                                JOHN R. KROOSS


                               Page 6 of 7 Pages



                                  EXHIBIT INDEX
                                  -------------


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

Exhibit 1*    Agreement and Plan of Reorganization, dated as of December 4, 2000

Exhibit 2*    Escrow Agreement, dated as of December 4, 2000


*Previously filed

                               Page 7 of 7 Pages