BRANDYWINE REALTY TRUST
8-K, 1998-01-27
REAL ESTATE INVESTMENT TRUSTS
Previous: SOUTHERN NEW ENGLAND TELECOMMUNICATIONS CORP, 8-K, 1998-01-27
Next: ARBOR DRUGS INC, S-8, 1998-01-27



<PAGE>
                                       
                      SECURITIES AND EXCHANGE COMMISSION 
                           Washington, D.C. 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) January 20, 1998
 
                            BRANDYWINE REALTY TRUST
                            -----------------------
            (Exact name of registrant as specified in its charter)
 
<TABLE>
<S>                                      <C>                          <C>
MARYLAND                                 (1-9106)                     (23-2413352)
- --------                                  ------                       ----------
(State or other jurisdiction of      (Commission                      (I.R.S. Employer
incorporation)                       file number)                 Identification Number)
                                                   
</TABLE>
                              
 
                16 Campus Boulevard, Newtown Square, Pennsylvania 19073 
                       (Address of principal executive offices) 

                                  (610) 325-5600 
                (Registrant's telephone number, including area code)
 
                                 Page 1 of 8 pages


<PAGE>

Item 5. Other Events
 
I. RREEF Portfolio
 
    As of the date of this filing, the Company has determined that it is 
probable that it will acquire, through Brandywine Operating Partnership, L.P. 
(the "Operating Partnership"), a portfolio of 14 properties containing 
approximately 941,471 net rentable square feet (collectively, the "RREEF 
Properties"). Thirteen of these properties are located in King of Prussia, PA 
and one is located in Middletown, PA. As part of this acquisition, the 
Company will also acquire through the Operating Partnership approximately 19 
acres of undeveloped land in King of Prussia, PA.

    As of January 23, 1998, the RREEF Properties were fully leased to 20 
tenants. Telespectrum Worldwide, Inc. and Lockheed Martin Corporation each 
individually occupies more than 10% of the total net rentable area of the 
portfolio under leases covering 178,635 and 158,000 net rentable square feet, 
respectively.
 
    The Company anticipates closing the purchase of the RREEF Properties on 
or about February 6, 1998. The purchase price for the RREEF Properties 
(including the undeveloped land) is anticipated to total approximately $55.5 
million. The Operating Partnership expects to pay the purchase price and 
closing expenses using borrowings under its existing revolving credit 
facility.
 
    The sellers of the RREEF Properties, RREEF MidAmerica/East Fund, RREEF 
USA Fund-I and RREEF MidAmerica East-V Six, Inc., each are parties 
unaffiliated with the Company and the Operating Partnership. The Company 
based its determination of the purchase price of the RREEF Properties on the 
expected cash flow, physical condition, location, competitive advantages, 
existing tenancies and opportunities to retain and attract additional 
tenants. The purchase price was determined by arm's-length negotiation 
between the Company and the sellers.
 
    The table set forth below shows certain information regarding rental 
rates and lease expirations for the RREEF Properties.
 

                                       2
<PAGE>

                         SCHEDULED LEASE EXPIRATIONS
 
                             (RREEF Portfolio)
 
<TABLE>
<CAPTION>

                                                                        
        YEAR OF              NUMBER OF LEASES        RENTABLE SQUARE     FINAL ANNUALIZED      PERCENTAGE OF TOTAL 
         LEASE               EXPIRING WITHIN         FOOTAGE SUBJECT     BASE RENT UNDER     FINAL ANNUALIZED BASE RENT
      EXPIRATION             THE YEAR AT (1)       TO EXPIRING LEASES   EXPIRING LEASES (2)   UNDER EXPIRING LEASES
- -----------------------  -----------------------  ---------------------  ------------------  -------------------------
<S>                      <C>                      <C>                    <C>                 <C>                        
          1998                        8               107,439            $     916,533             17.4%
          1999                        1                25,000                   75,000              1.4%
          2000                        7               256,141                1,262,667             23.9%
          2001                        3                72,072                  367,839              7.0%
          2002                        4               353,635                1,767,771             33.5%
          2003                   --                     --                      --                  --
          2004                   --                     --                      --                  --
          2005                        1                77,184                  540,288             10.2%
          2006                   --                     --                      --                  --
      2007 and
    Thereafter                        1                50,000                  350,000              6.6%
                                 ------               -------            -------------            -----
          Total                      25               941,471            $   5,280,098            100.0%
                                 ------               -------            -------------            -----
                                 ------               -------            -------------            -----

</TABLE>
 
 
(1) A lease is considered to expire if, and at any time, it is terminable by the
    tenant without payment of penalty or premium.
 
(2) "Final Annualized Base Rent" for each lease scheduled to expire represents
    the cash rental rate in the final month prior to expiration multiplied by
    twelve.
 

                                     3

<PAGE>

II.  Financial Statements
 
    Financial statements for the RREEF Properties are included in this 
Current Report under Item 7. After reasonable inquiry, the Company is not 
aware of any material factors relating to the above mentioned properties that 
would cause the reported financial information relating to such properties 
not to be necessarily indicative of future operating results.

                                    4

<PAGE>
 
III.  Four Tower Bridge Partnership
 
    On January 20, 1998, Four Tower Bridge Associates ("Four Tower Bridge 
Partnership"), a limited partnership in which a wholly-owned subsidiary of 
the Operating Partnership is a general partner, obtained a $16.75 million 
construction loan (the "Construction Loan") from PNC Bank, National 
Association (the "Bank") to finance construction of an approximately 85,000 
square foot office building (the "Four Tower Bridge Building") in West 
Conshohocken, Montgomery County, Pennsylvania. Additional information 
relating to this development project is contained in Item 5 of a Current 
Report on Form 8-K filed with the Securities and Exchange Commission on 
November 17, 1997.
 
    In connection with the Construction Loan, the Operating Partnership 
agreed to provide an equity contribution of $6.75 million to the Four Tower 
Bridge Partnership upon the earlier of: (i) one year from the Construction 
Loan closing; (ii) receipt of a certificate of occupancy for the Four Tower 
Bridge Building; and (iii) a default under the Construction Loan. In 
addition, the Operating Partnership agreed to provide a $10.0 million forward 
commitment for the benefit of the Bank pursuant to which it would loan $10.0 
million to Four Tower Bridge Partnership under certain circumstances to 
provide Four Tower Bridge Partnership funds that would (together with the 
$6.75 million equity contribution) enable it to repay the entire principal 
amount of the Construction Loan. Four Tower Bridge Partnership expects, 
however, that an unaffiliated third party, such as an insurance company or 
pension fund, will provide the permanent loan to refinance the Construction 
Loan upon completion of the Four Tower Bridge Building. The Operating 
Partnership's equity contribution will be entitled to a 10% preferential 
return, and advances, if any, made by the Operating Partnership under its 
forward commitment would accrue interest at LIBOR plus 250 basis points, 
would be repayable over ten years and would be secured by a first priority 
mortgage on the Four Tower Bridge Building. A copy of the forward commitment 
is attached as an exhibit under Item 7.
 
IV.  Other
 
    In a Current Report on Form 8-K filed by the Company with the Securities 
and Exchange Commission on January 9, 1998, the Company reported under Item 2 
its January 5, 1998 consummation of the acquisition of a portfolio of 
properties. Management of the Company 

                                     5

<PAGE>

expects that the Company will make approximately $2.0 million in capital 
expenditures during 1998 with respect to the Park 80 West facility in Saddle 
Brook, New Jersey acquired as part of this transaction. These expenditures 
will be primarily to replace and upgrade the electrical and HVAC systems and 
to make structural repairs to the parking garage and certain common areas. 



                                     6

<PAGE> 

Item 7. Financial Statements, Pro Forma Financial Information and Exhibits.

    (a) Financial Statements.
 
        The audited statement of revenue and certain operating expenses of 
        the RREEF Properties for the year ended December 31, 1996 and the 
        unaudited statement of revenue and certain operating expenses for the 
        nine months ended September 30, 1997 are included on pages F-17 to 
        F-20.
 
    (b) Pro Forma Financial Information.
 
        Pro forma financial information which reflects the Company's 
        acquisition of the RREEF Properties as of and for the nine months 
        ended September 30, 1997 and for the year ended December 31, 1996 
        are included on pages F-1 to F-16.
 
    (c) Exhibits. 

        10.1--Forward Commitment. 

        10.2--Agreement of Purchase and Sale between Brandywine Operating 
              Partnership, L.P. and RREEF MidAmerica/East Fund-IV.

        10.3--Agreement of Purchase and Sale between Brandywine Operating 
              Partnership, L.P. and RREEF MidAmerica East-V Six, Inc. 

        10.4--Agreement of Purchase and Sale between Brandywine Operating 
              Partnership, L.P. and RREEF USA Fund-I. 

        23.1--Consent of Arthur Andersen LLP
 
                                     7

<PAGE>

SIGNATURE
 
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.
 
                                              BRANDYWINE REALTY TRUST
 
Date: January 27, 1998                        By: /s/ Gerard H. Sweeney 
                                                 ------------------------
                                              Gerard H. Sweeney, President and
                                              Chief Executive Officer 
                                              (Principal Executive Officer)
 
Date: January 27, 1998                        By: /s/ Mark S. Kripke 
                                                  ------------------------
                                              Mark S. Kripke, Chief
                                              Financial Officer (Principal
                                              Financial and Accounting 
                                              Officer)
 
                                       8


<PAGE>
                            BRANDYWINE REALTY TRUST
 
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<S>     <C>                                                                             <C>
I.      UNAUDITED PRO FORMA CONDENSED CONSOLIDATING FINANCIAL INFORMATION

- -       Pro Forma Condensed Consolidating Balance Sheet as of September 30, 1997......      F-4

- -       Pro Forma Condensed Consolidating Statement of Operations for the Year Ended
        December 31, 1996.............................................................      F-5

- -       Pro Forma Condensed Consolidating Statement of Operations for the Nine Months
        Ended September 30, 1997......................................................      F-6

- -       Notes and Management's Assumptions to Unaudited Pro Forma Condensed
        Consolidating Financial Information...........................................      F-7

II.     RREEF PROPERTIES

- -       Report of Independent Public Accountants......................................      F-17

- -       Combined Statements of Revenue and Certain Expenses for the Year Ended 
        December 31, 1996 (audited) and for the Nine Month Period Ended 
        September 30, 1997 (unaudited)................................................      F-18

- -       Notes to Statements of Revenue and Certain Expenses...........................      F-19

</TABLE>


                                       F-1

<PAGE>
 
                            BRANDYWINE REALTY TRUST
            PRO FORMA CONDENSED CONSOLIDATING FINANCIAL INFORMATION
 
    The following sets forth the pro forma condensed consolidating balance 
sheet of Brandywine Realty Trust ("the Company") as of September 30, 1997 and 
the pro forma condensed consolidating statements of operations for the nine 
months ended September 30, 1997 and for the year ended December 31, 1996.
 
    The pro forma condensed consolidating financial information should be 
read in conjunction with the historical financial statements of the Company 
and those acquisitions deemed significant pursuant to the rules and 
regulations of the Securities and Exchange Commission.
 
    The unaudited pro forma condensed consolidating financial information is 
presented as if the following events occurred on September 30, 1997 for 
balance sheet purposes, and at the beginning of the period presented for 
purposes of the statements of operations: 

- - The Company acquired the properties described in Note 1 to these pro forma 
  financial statements. 

- - The Company acquired its partnership interests in Brandywine Operating 
  Partnership, L.P. (the "Operating Partnership"). 

- - The Company issued 4,600,000 Common Shares at $16.50 per share, of which 
  600,000 shares related to the underwriter's exercise of the over-allotment
  option (the "1996 Offering"). 

- - The Company issued 636,363 Common Shares at $16.50 per share to a voting 
  trust established for the benefit of the Pennsylvania State Employees 
  Retirement System ("SERS"), in exchange for $10.5 million (the "SERS 
  Offering") and contributed such proceeds to the Operating Partnership in 
  exchange for 636,363 units of general partnership interest ("GP Units") in 
  the Operating Partnership. 

- - The Company issued 709,090 Common Shares at $16.50 per share to two 
  investment funds managed by Morgan Stanley Asset Management Inc. (the "Morgan
  Stanley Offering") and contributed the proceeds to the Operating Partnership 
  in exchange for 709,090 GP Units. 

- - The Operating Partnership repaid $49,805,000 of mortgage indebtedness and 
  $764,000 of loans made by Safeguard Scientifics, Inc. and paid a $500,000 
  prepayment penalty with a portion of the proceeds of the 1996 Offering, the
  SERS Offering and the Morgan Stanley Offering. 

- - The Company issued 2,375,500 Common Shares at $20.625 per share, of which 
  175,500 shares related to the underwriter's exercise of the over-allotment
  option (the "March 1997 Offering"). 

- - The Company issued 11,500,000 Common Shares at $20.75 per share, of which 
  1,500,000 shares related to the underwriter's exercise of the over-allotment
  option (the "July 1997 Offering"). The net proceeds from the July 1997 
  Offering were contributed to the Operating Partnership in exchange for 
  11,500,000 GP Units. 

- - The Operating Partnership repaid $160,775,000 of indebtedness under the 
  Company's revolving credit facility using proceeds from the July 1997 
  Offering. 

- - The Company issued 786,840 Common Shares at $22.31 per share (the 
  "September 1997 Offering"). The net proceeds from the September 1997 Offering
  were contributed to the Operating Partnership in exchange for 786,840 GP 
  Units. 

- - The Company issued 751,269 Common Shares at $24.63 per share (the "December 
  1997 Offering"). The net proceeds from the December 1997 Offering were 
  contributed to the Operating Partnership in exchange for 751,269 GP Units.


                                       F-2

<PAGE>

    The pro forma condensed consolidating financial information does not give 
effect to the Company's pending underwritten equity offering of Common 
Shares, as more fully described in a Prospectus Supplement and Prospectus 
filed with the Securities and Exchange Commission on January 9, 1998.

    The pro forma condensed consolidating financial information is unaudited 
and is not necessarily indicative of what the actual financial position would 
have been at September 30, 1997, nor does it purport to represent the future 
financial position and the results of operations of the Company.
 

                                       F-3

<PAGE>
                            BRANDYWINE REALTY TRUST
 
                PRO FORMA CONDENSED CONSOLIDATING BALANCE SHEET
                    AS OF SEPTEMBER 30, 1997 (NOTES 1 AND 2)
 
                                  (UNAUDITED)
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                   BRANDYWINE
                                  REALTY TRUST                           
                                   HISTORICAL                    OTHER RECENT
                                  CONSOLIDATED    DECEMBER 1997  ACQUISITIONS      RREEF         PRO FORMA
                                       (A)         OFFERING (B)      (C)       PROPERTIES (D)  CONSOLIDATED
                                   ------------   -------------  -----------   --------------  -------------
<S>                                <C>            <C>            <C>           <C>              <C>
ASSETS:
  Real estate investments, net...  $  462,772     $    --        $   330,356   $    56,680      $    849,808
  Cash and cash equivalents......      19,965          --             --             --               19,965
  Escrowed cash..................         348          --             --             --                  348
  Accounts receivable............       2,465          --             --             --                2,465
  Due from affiliates............      --              --             --             --               --
  Investment in management 
    company......................         318          --             --             --                  318
  Deferred costs and other 
    assets.......................       8,470          --             --             --                8,470
                                   ------------   -------------  -----------   --------------   ------------
    Total assets.................     494,338          --            330,356         56,680          881,374
                                   ------------   -------------  -----------   --------------   ------------
                                   ------------   -------------  -----------   --------------   ------------
LIABILITIES:
  Mortgage notes payable.........      47,984           --             --             --              47,984
  Notes payable, Credit Facility.      14,000         (17,593)       320,848         56,680          373,935
  Accrued interest...............         303           --             --             --                 303
  Accounts payable and accrued 
    expenses.....................       4,128           --             --             --               4,128
  Distributions payable..........       8,338           --             --             --               8,338
  Tenant security deposits
    and deferred rents...........       3,960           --             --             --               3,960
  Tenant security deposits
    and deferred rents...........         387           --             --             --                 387
                                   ------------   -------------  -----------   --------------   ------------
    Total liabilities............      79,100         (17,593)       320,848         56,680          439,035
                                   ------------   -------------  -----------   --------------   ------------
MINORITY INTEREST................       4,894           --             9,508         --               14,402
                                   ------------   -------------  -----------   --------------   ------------
BENEFICIARIES' EQUITY:
  Common shares of
    beneficial interest..........         234               8         --             --                  242
  Additional paid-in capital.....     428,787          17,585         --             --              446,372
  Share warrants.................         962           --            --             --                  962
  Cumulative earnings............       5,209           --            --             --                5,209
  Cumulative distributions.......     (24,848)          --            --             --              (24,848)
                                   ------------   -------------  -----------   --------------   ------------
    Total beneficiaries' equity..     410,344          17,593         --             --              427,937
                                   ------------   -------------  -----------   --------------   ------------
    Total liabilities and
      beneficiaries' equity......  $  494,338      $    --         $ 330,356      $  56,680        $ 881,374
                                   ------------   -------------  -----------   --------------   ------------
                                   ------------   -------------  -----------   --------------   ------------
</TABLE>
 

                                       F-4

<PAGE>
                            BRANDYWINE REALTY TRUST
 
           PRO FORMA CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
              FOR THE YEAR ENDED DECEMBER 31, 1996 (NOTES 1 AND 3)
 
                                  (UNAUDITED)
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
<TABLE>
<CAPTION>
                                             BRANDYWINE                                      1997 EVENTS                         
                                               REALTY                               -----------------------------                
                                               TRUST                                   1997                            TOTAL     
                                             HISTORICAL         1996                  OTHER           RREEF          PRO FORMA   
                                          CONSOLIDATED (A)   EVENTS (B)   SUBTOTAL  EVENTS (C)    PROPERTIES (E)    CONSOLIDATED 
                                          ----------------   ----------   --------  ----------   ----------------   ------------ 
<S>                                       <C>                <C>          <C>       <C>          <C>                <C>          
REVENUE:
  Base rents............................     $   8,462        $12,646     $21,108    $75,395          $4,051         $  100,554  
  Tenant reimbursements.................         1,372          2,838       4,210      9,754             643             14,607  
  Other.................................           196            100         296        683            --                  979  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
    Total Revenue.......................        10,030         15,584      25,614     85,832           4,694            116,140  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
OPERATING EXPENSES:                                                                                                              
  Interest..............................         2,751            513       3,264     25,478           4,251             32,993  
  Depreciation and amortization.........         2,836          4,687       7,523     20,447           1,814             29,784  
  Property expenses.....................         3,709          6,830      10,539     36,189           1,288             48,016  
  General and administrative............           825            148         973      --               --                  973  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
    Total operating expenses............        10,121         12,178      22,299     82,114           7,353            111,766  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
Income (loss) before minority interest                                                                                         
    and equity in income (loss) of                                                                                               
    management company..................           (91)         3,406       3,315      3,718          (2,659)             4,374  

Equity in income (loss) of management                                                                                            
  company...............................           (26)            66          40      1,194              97              1,331  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
Income (loss) before minority                                                                                                    
  interest..............................          (117)         3,472       3,355      4,912          (2,562)             5,705  

Minority interest in (income) loss......           (45)          (429)       (474)       361              75                (38) 
                                          ----------------   ----------   --------  ----------        ------        ------------ 
Net income (loss).......................          (162)         3,043       2,881      5,273          (2,487)             5,667  

(Income) loss allocated to Preferred                                                                                             
  Shares................................          (401)        (1,847)     (2,248)     --               --               (2,248) 
                                          ----------------   ----------   --------  ----------        ------        ------------ 
Income (loss) allocated to Common                                                                                                
  Shares................................     $    (563)       $ 1,196     $   633    $ 5,273          $(2,487)       $    3,419  
                                          ----------------   ----------   --------  ----------        ------        ------------ 
                                          ----------------   ----------   --------  ----------        ------        ------------ 
Earnings (loss) per Common Share........     $   (0.43)                                                              $     0.15  
                                          ----------------                                                          ------------ 
                                          ----------------                                                          ------------ 
Weighted average number of shares                                                                                                
  outstanding including share                                                                                                    
  equivalents...........................     1,302,648                                                               22,329,515  
                                          ----------------                                                          ------------ 
</TABLE>


                                       F-5

<PAGE>
                            BRANDYWINE REALTY TRUST
 
            PRO FORMA CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS
           FOR THE NINE MONTHS ENDED SEPTEMBER 30, 1997 (NOTES 1 AND 3)

                                  (UNAUDITED) 
                (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                          1997 EVENTS
                                                                 -----------------------------
<S>                                        <C>                   <C>           <C>              <C>
                                                BRANDYWINE
                                                  REALTY
                                                  TRUST              1997          RREEF             TOTAL
                                                HISTORICAL          OTHER        PROPERTIES        PRO FORMA
                                             CONSOLIDATED (A)     EVENTS (D)         (E)          CONSOLIDATED
                                           --------------------  ------------  ---------------  ----------------
REVENUE:
  Base rents.............................      $     32,290       $   46,128      $   3,120       $     81,538
  Tenant reimbursements..................             5,731            5,272            529             11,532
  Other..................................               818              402           --                1,220
                                                 ----------      ------------        ------     ----------------
    Total Revenue........................            38,839           51,802          3,649             94,290
                                                 ----------      ------------        ------     ----------------
OPERATING EXPENSES:
  Interest...............................             4,899           16,531          3,180             24,610
  Depreciation and amortization..........            10,051           12,119          1,357             23,527
  Property operating expenses............            14,805           20,385            939             36,129
  Other expenses.........................               705           --               --                  705
                                                 ----------      ------------        ------     ----------------
    Total operating expenses.............            30,460           49,035          5,476             84,971
                                                 ----------      ------------        ------     ----------------
                                                 ----------      ------------        ------     ----------------
Income (loss) before equity income of
  management company and minority
  interest...............................             8,379            2,767         (1,827)             9,319

Equity in income (loss) of management
  company................................               332              798             73              1,203
                                                 ----------      ------------        ------     ----------------
Income (loss) before minority interest...             8,711            3,565         (1,754)            10,522

Minority interest in (income) loss.......              (256)            (105)            52               (309)
                                                 ----------      ------------        ------     ----------------
Net income (loss)........................             8,455            3,460         (1,702)            10,213

(Income) loss allocated to Preferred
  Shares.................................              (499)          --             --                   (499)
                                                 ----------      ------------        ------     ----------------
Income (loss) allocated to Common
  Shares.................................      $      7,956       $    3,460      $  (1,702)      $      9,714
                                                 ----------      ------------        ------     ----------------
                                                 ----------      ------------        ------     ----------------
Earnings (loss) per Common Share.........      $       0.90                                       $       0.40
                                                 ----------                                     ----------------
                                                 ----------                                     ----------------
Weighted average number of shares
  outstanding including share
  equivalents............................         8,809,379                                         24,134,025
                                                 ----------                                     ----------------
</TABLE>

                                       F-6

<PAGE>
                            BRANDYWINE REALTY TRUST
 
                     NOTES AND MANAGEMENT'S ASSUMPTIONS TO
         UNAUDITED PRO FORMA CONDENSED CONSOLIDATING FINANCIAL INFORMATION 
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE AMOUNTS)
                            BRANDYWINE REALTY TRUST
 
1. BASIS OF PRESENTATION:
 
    Brandywine Realty Trust (the "Company") is a Maryland real estate investment
trust. As of January 27, 1998, the Company owned 139 properties. The Company's
interest in all of the Properties is held through Brandywine Operating
Partnership, L.P. (the "Operating Partnership"). The Company is the sole general
partner of the Operating Partnership and as of January 27, 1998, the Company
held a 98.2% interest in the Operating Partnership.
 
    These pro forma financial statements should be read in conjunction with 
the historical financial statements and notes thereto of the Company, the 
SSI/TNC Properties, the LibertyView Building, the nine properties (the "SERS 
Properties") acquired in November 1996 from SERS and its subsidiaries, 
Delaware Corporate Center I, 700/800 Business Center Drive, the Columbia 
Acquisition Properties, the Main Street Acquisition Properties, the TA 
Properties, the Emmes Properties, the Greentree Executive Campus Acquisition 
Properties, 748 & 855 Springdale Drive, the Green Hills Properties, the 
Berwyn Park Properties, 500 & 501 Office Center Drive, Metropolitan 
Industrial Center, Atrium 1, Bala Pointe Office Centre, the Scarborough 
Properties, the GMH Properties and the RREEF Properties. In management's 
opinion, all adjustments necessary to reflect the effects of the 1996 
Offering, the SERS Offering, the Morgan Stanley Offering, the March 1997 
Offering, the July 1997 Offering, the September 1997 Offering, the December 
1997 Offering, the acquisitions of the SSI/TNC Properties, the LibertyView 
Building, the 1996 Additional Acquisition Properties (consisting of the SERS 
Properties, Delaware Corporate Center I, 700/800 Business Center Drive and 
8000 Lincoln Drive), the Columbia Acquisition Properties, the Main Street 
Acquisition Properties, 1336 Enterprise Drive, the Greentree Executive 
Campus, Five Eves Drive, Kings Manor, the TA Properties, the Emmes 
Properties, 748 & 855 Springdale Drive, 1974 Sproul Road, the Green Hills 
Properties, the Berwyn Park Properties, 500 & 501 Office Center Drive, 
Metropolitan Industrial Center, Atrium 1, 5 & 6 Cherry Hill Executive Campus, 
220 Commerce Drive, Provident Place, the PECO Building, Bala Pointe Office 
Centre, the Scarborough Properties, the GMH Properties and the RREEF 
Properties by the Company have been made.
 
2. ADJUSTMENTS TO PRO FORMA CONDENSED CONSOLIDATING BALANCE SHEET:
 
    (A) Reflects the Company's historical consolidated balance sheet as of
September 30, 1997.
 
    (B) Reflects the December 1997 Offering and the use of the net proceeds to
repay $17.6 million of indebtedness under the Credit Facility.
 
                                       F-7
<PAGE>

    (C) Reflects the Company's acquisiton of several property acquisitions as
follows:
 
<TABLE>
<CAPTION>

Property                                                                 Purchase Price  Closing Costs    Total
- -----------------------------------------------------------------------  --------------  -------------  ----------
<S>                                                                      <C>             <C>            <C>
Atrium I...............................................................   $     10,250     $      45    $   10,295
5 & 6 Cherry Hill Executive Campus.....................................          3,484            20         3,504
220 Commerce Drive.....................................................          5,300           129         5,429
Provident Place........................................................          6,300           152         6,452
PECO Building..........................................................          9,500           146         9,646
Bala Pointe Office Center..............................................         26,750           403        27,153
Scarborough Properties.................................................         37,075           122        37,197
GMH Properties.........................................................        229,015         1,665       230,680
                                                                         --------------       ------    ----------
  Total................................................................   $    327,674     $   2,682    $  330,356
                                                                         --------------       ------    ----------
                                                                         --------------       ------    ----------
</TABLE>
 
    (D) Reflects the Company's acquisition of the RREEF Properties as follows:
 
<TABLE>
<S>                                                                                  <C>
Purchase Price.....................................................................  $  55,500
Closing Costs......................................................................      1,180
                                                                                     ---------
                                                                                     $  56,680
                                                                                     ---------
                                                                                     ---------
</TABLE>
 
 
    3. ADJUSTMENTS TO PRO FORMA CONDENSED CONSOLIDATING STATEMENTS OF
OPERATIONS:
 
    (A) Reflects the historical consolidated operations of the Company.
 
    (B) Reflects the historical operations of the SSI/TNC Properties,
LibertyView Building and the 1996 Additional Acquisition Properties from January
1, 1996 through the respective dates of acquisition, plus the pro forma 1996
Offering adjustments. The table below reflects the adjustments:
 
                                       F-8
<PAGE>

<TABLE>
<CAPTION>
                                    SSI/TNC
                                 Properties and                Delaware        700/800
                                  LibertyView        SERS      Corporate   Business Center
                                    Building      Properties    Center          Drive
                                 --------------   ----------   ---------   ---------------
<S>                              <C>              <C>          <C>         <C>
Revenue:
  Base rents...................     $ 5,714         $4,008      $2,036          $651
  Tenant reimbursements........       2,511            249       --               76
  Other........................         100          --          --           --
                                    -------       ----------   ---------       -----
    Total revenue..............       8,325          4,257       2,036           727

Operating Expenses:
  Interest.....................       3,783            194       --           --
  Depreciation and
    amortization...............       2,819            818         374           212
  Property expenses............       2,831          2,217         552           270
  General and administrative...         715          --          --           --
                                    -------       ----------   ---------       -----
    Total operating expenses...      10,148          3,229         926           482

Income (loss) before management
  company and minority
  interest.....................      (1,823)         1,028       1,110           245
Equity in income (loss) of
  management company...........          75          --          --           --
                                    -------       ----------   ---------       -----
Income (loss) before minority
  interest.....................      (1,748)         1,028       1,110           245
Minority interest in (income)
  loss.........................         513          --          --           --
                                    -------       ----------   ---------       -----
Net income (loss)..............      (1,235)         1,028       1,110           245
Income allocated to Preferred
  Shares.......................      --              --          --           --
                                    -------       ----------   ---------       -----
Income (loss) allocated to
  Common Shares................     $(1,235)        $1,028      $1,110          $245
                                    -------       ----------   ---------       -----
 
<CAPTION>
                                                 1996 Pro
                                                   Forma      Total Pro
                                                  & Other       Forma
                                 8000 Lincoln    Offering       1996
                                    Drive       Adjustments    Events
                                 ------------   -----------   ---------
<S>                              <C>            <C>           <C>
Revenue:
  Base rents...................      $237         $--          $12,646
  Tenant reimbursements........         2          --            2,838
  Other........................     --             --              100
                                    -----       -----------   ---------
    Total revenue..............       239          --           15,584

Operating Expenses:
  Interest.....................     --             (3,464)         513
  Depreciation and
  amortization.................        89             375        4,687
  Property expenses............       231             729        6,830
  General and administrative...     --               (567)         148
                                    -----       -----------   ---------
    Total operating expenses...       320          (2,927)      12,178

Income (loss) before management
  company and minority
  interest.....................       (81)          2,927        3,406
Equity in income (loss) of
  management company...........     --                 (9)          66
                                    -----       -----------   ---------
Income (loss) before minority
  interest.....................       (81)          2,918        3,472
Minority interest in (income)
  loss.........................     --               (942)        (429)
                                    -----       -----------   ---------
Net income (loss)..............       (81)          1,976        3,043
Income allocated to Preferred
  Shares.......................     --             (1,847)      (1,847)
                                    -----       -----------   ---------
Income (loss) allocated to
  Common Shares................      $(81)        $   129      $ 1,196
                                    -----       -----------   ---------
</TABLE>
 
                                       F-9
<PAGE>

    (C) Reflects the pro forma statements of operations of the Columbia 
Acquisition Properties, the Main Street Acquisition Properties, 1336 
Enterprise Drive, Kings Manor, Greentree Executive Campus, Five Eves Drive, 
the TA Properties, the Emmes Properties, 748 & 855 Springdale Drive, 1974 
Sproul Road, the Berwyn Park Properties, the Green Hills Properties, 500/501 
Office Center Drive, Christiana Corporate Center, Metropolitan Industrial 
Center, Atrium 1, 5 & 6 Cherry Hill Executive Campus, 220 Commerce Drive, 
Provident Place, the PECO Building, Bala Pointe Office Centre, the 
Scarborough Properties and the GMH Properties for the year ended December 31, 
1996 and other pro forma adjustments to reflect the March 1997 Offering, the 
July 1997 Offering, the September 1997 Offering and the December 1997 
Offering for the year ended December 31, 1996. The operating results 
reflected below include the historical results and related pro forma 
adjustments to reflect the period January 1, 1996 through the earlier of the 
respective acquisition dates or December 31, 1996. Operating results from 
those dates forward are included in the historical results of the Company.

<TABLE>
<CAPTION>
                                                  Columbia    Main Street      1336                         Greentree
                                                 Acquisition  Acquisition   Enterprise                      Executive    Five Eves
                                                 Properties   Properties       Drive        Kings Manor      Campus        Drive
                                                 -----------  -----------  -------------  ---------------  -----------  -----------
<S>                                              <C>          <C>          <C>            <C>              <C>          <C>
Revenue:
  Base rents...................................   $   5,146    $   3,141     $     437       $     411      $   1,862    $     348
  Tenant reimbursements........................         359          347            75             107            175           39
  Other........................................         376       --            --              --             --                1
                                                 -----------  -----------        -----           -----     -----------       -----
    Total revenue..............................       5,881        3,488           512             518          2,037          388
                                                 -----------  -----------        -----           -----     -----------       -----
Operating Expenses:
  Interest (i).................................       1,680       --            --              --                841          254
  Depreciation and amortization (ii)...........       1,007          629           117             114            359          108
  Property expenses............................       1,979        2,194           107             170          1,018          151
  General and administrative...................      --           --            --              --             --           --
                                                 -----------  -----------        -----           -----     -----------       -----
    Total operating expenses...................       4,666        2,823           224             284          2,218          513
                                                 -----------  -----------        -----           -----     -----------       -----
Income (loss) before equity in income of
  management company and minority interest.....       1,215          665           288             234           (181)        (125)
Equity in income (loss) of management company
  (iii)........................................      --           --            --              --             --           --
                                                 -----------  -----------        -----           -----     -----------       -----
Income (loss) before minority interest.........       1,215          665           288             234           (181)        (125)
Minority interest in (income) loss.............         (36)         (20)           (8)             (7)             5            4
Net income.....................................   $   1,179    $     645     $     280       $     227      $    (176)   $    (121)
                                                 -----------  -----------        -----           -----     -----------       -----
                                                 -----------  -----------        -----           -----     -----------       -----
</TABLE>
 
<TABLE>
<CAPTION>
                                                                              748 & 855
                                                                  Emmes      Springdale    1974 Sproul   MARCH 1997     JULY 1997
                                                Ta Properties  Properties       Drive         Road        Offering      Offering
                                                -------------  -----------  -------------  -----------  -------------  -----------
<S>                                             <C>            <C>          <C>            <C>          <C>            <C>
Revenue:
  Base rents..................................    $   5,102     $   6,214     $     940     $     774     $  --         $  --
  Tenant reimbursements.......................          735         2,681        --               118        --            --
  Other.......................................            9            10        --            --            --            --
                                                     ------    -----------        -----    -----------          ---    -----------
    Total revenue.............................        5,846         8,905           940           892        --            --
                                                     ------    -----------        -----    -----------          ---    -----------
Operating Expenses:
  Interest (i)................................        3,168         4,987           400        --              (525)      (12,058)
  Depreciation and amortization (ii)..........        1,352         2,128           171           134        --            --
  Property expenses...........................        1,962         3,482           250           492        --            --
  General and administrative..................       --            --            --            --            --            --
                                                     ------    -----------        -----    -----------          ---    -----------
    Total operating expenses..................        6,482        10,597           821           626          (525)      (12,058)
                                                     ------    -----------        -----    -----------          ---    -----------
Income (loss) before equity in income of
  management company and minority interest....         (636)       (1,692)          119           266           525        12,058
Equity in income (loss) of management company
  (iii).......................................          105            65            23            22        --            --
                                                     ------    -----------        -----    -----------          ---    -----------
Income (loss) before minority interest........         (531)       (1,627)          142           288           525        12,058
Minority interest in (income) loss............           16            48            (4)           (8)          342          (293)
                                                     ------    -----------        -----    -----------          ---    -----------
Net income....................................    $    (515)    $  (1,579)    $     138     $     280     $     867     $  11,765
                                                     ------    -----------        -----    -----------          ---    -----------
                                                     ------    -----------        -----    -----------          ---    -----------
</TABLE>
 
                                       F-10
<PAGE>
 
<TABLE>
<CAPTION>
                                                           Green Hills      500/501      Christiana    Metropolitan
                                            Berwyn Park    Properties       Office        Corporate     Industrial
                                            Properties        (IV)       Center Drive      Center         Center       Atrium 1
                                           -------------  -------------  -------------  -------------  -------------  -----------
<S>                                        <C>            <C>            <C>            <C>            <C>            <C>
Revenue:
  Base rents.............................    $   3,815      $   7,700      $   1,754      $     768      $   1,811     $   1,226
  Tenant reimbursements..................          720         --              1,358             61            406            33
  Other..................................          108         --                 43              2              9            26
                                                ------         ------         ------          -----         ------    -----------
    Total revenue........................        4,643          7,700          3,155            831          2,226         1,285
                                                ------         ------         ------          -----         ------    -----------
Operating Expenses:
  Interest (i)...........................       --              1,200          1,125            430          1,238           772
  Depreciation and amortization (ii).....        1,205          1,294            547            183            528           329
  Property expenses......................        1,991          3,419          1,561            337            678           755
  General and administrative.............       --             --             --             --             --            --
                                                ------         ------         ------          -----         ------    -----------
    Total operating expenses.............        3,196          5,913          3,233            950          2,444         1,856
                                                ------         ------         ------          -----         ------    -----------
Income (loss) before equity in income of
  management company and minority
  interest...............................        1,447          1,787            (78)          (119)          (218)         (571)
Equity in income (loss) of management
  company (iii)..........................          166           (115)            76              5             53            31
                                                ------         ------         ------          -----         ------    -----------
Income (loss) before minority interest...        1,613          1,672             (2)          (114)          (165)         (540)
Minority interest in (income) loss.......          (47)           (49)        --                  3              5            16
                                                ------         ------         ------          -----         ------    -----------
Net income...............................    $   1,566      $   1,623      $      (2)     $    (111)     $    (160)    $    (524)
                                                ------         ------         ------          -----         ------    -----------
                                                ------         ------         ------          -----         ------    -----------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                 5 & 6 Cherry                                     Peco
                                                 September      Hill Executive    220 Commerce     Provident    Building
                                               1997 Offering        Campus            Drive          Place         (V)
                                             -----------------  ---------------  ---------------  -----------  -----------
<S>                                          <C>                <C>              <C>              <C>          <C>
Revenue:
  Base rents...............................      $  --             $     152        $     572      $     756    $   1,017
  Tenant reimbursements....................         --                --               --                105       --
  Other....................................         --                --               --                  8       --
                                                 -------             -------           -------          -----   -----------
    Total revenue..........................         --                   152              572            869        1,017
                                                 -------             -------           -------          -----   -----------
Operating Expenses:
  Interest (i).............................         --                   263              407            484          723
  Depreciation and amortization (ii).......         --                   112              174            206          309
  Property expenses........................         --                   169              194            333       --
  General and administrative...............         --                --               --             --           --
                                                 -------             -------           -------          -----   -----------
    Total operating expenses...............         --                   544              775          1,023        1,032
                                                 -------             -------           -------          -----   -----------
Income (loss) before equity in income
  of management company and minority
  interest.................................         --                  (392)            (203)          (154)         (15)
Equity in income (loss) of management
  company (iii)............................         --                --                   12             18       --
                                                 -------             -------           -------          -----   -----------
Income (loss) before minority interest.....         --                  (392)            (191)          (136)         (15)
Minority interest in (income) loss.........         33                    12                6              4       --
                                                 -------             -------           -------          -----   -----------
Net income.................................      $  33             $    (380)       $    (185)     $    (132)   $     (15)
                                                 -------             -------           -------          -----   -----------
                                                 -------             -------           -------          -----   -----------
</TABLE>
 
                                       F-11
<PAGE>
 
<TABLE>
<CAPTION>
                                                 December      Bala Pointe    Scarborough       GMH      Total Other
                                               1997 Offering  Office Centre   Properties    Properties   1997 Events
                                               -------------  -------------  -------------  -----------  -----------
<S>                                            <C>            <C>            <C>            <C>          <C>
Revenue:
  Base rents.................................    $  --          $   3,572      $   4,971     $  22,906    $  75,395
  Tenant reimbursements......................       --                 21            239         2,175        9,754
  Other......................................       --                 35         --                56          683
                                                    ------         ------         ------    -----------  -----------
    Total revenue............................       --              3,628          5,210        25,137       85,832
                                                    ------         ------         ------    -----------  -----------
Operating Expenses:
  Interest (i)...............................       (1,319)         2,036          2,071        17,301       25,478
  Depreciation and amortization (ii).........       --                869          1,190         7,382       20,447
  Property expenses..........................       --              1,559          2,424        10,964       36,189
  General and administrative.................       --             --             --            --           --
                                                    ------         ------         ------    -----------  -----------
    Total operating expenses.................       (1,319)         4,464          5,685        35,647       82,114
                                                    ------         ------         ------    -----------  -----------
Income (loss) before equity in income of
  management company and minority interest...        1,319           (836)          (475)      (10,510)       3,718
Equity in income (loss) of management company
  (iii)......................................       --                 64            119           550        1,194
                                                    ------         ------         ------    -----------  -----------
Income (loss) before minority interest.......        1,319           (772)          (356)       (9,960)       4,912
Minority interest in (income) loss...........          (39)            23             10           293          361
                                                    ------         ------         ------    -----------  -----------
Net income...................................    $   1,280      $    (749)     $    (346)    $  (9,667)   $   5,273
                                                    ------         ------         ------    -----------  -----------
                                                    ------         ------         ------    -----------  -----------
</TABLE>
 
- ------------------------
 
(i)   Pro forma interest expense is presented assuming an effective rate of 
      7.5% on borrowings under the Company's revolving credit facility. The 
      adjustment for the Columbia Acquisition Properties also reflects an 
      effective interest rate of 9.5% on assumed debt. The adjustments for 
      the March 1997 Offering, the July 1997 Offering and the December 1997 
      Offering represent interest savings related to the payoff of $7 million
      and $160.8 million, respectively, of credit facility borrowings at an 
      effective rate of 7.5%.
 
(ii)  Pro forma depreciation expense is presented assuming an 80% building 
      and 20% land allocation of the purchase price and capitalized closing 
      costs and assumes a useful life of 25 years.
 
(iii) Pro forma equity in income of management company is presented based on
      management fees less incremental costs estimated to be incurred.
 
(iv)  Pro forma property expenses of the Green Hill Properties exclude $666,000
      from historical amounts. Such amount represents expected salary savings.
 
(v)   Pro forma base rents for the Peco Building are based on the lease in 
      place as of November 25, 1997 as historically the property was owner 
      occupied and was not an operating property. All property expenses are 
      paid directly by the tenant.
 
      (D) Reflects the pro forma adjustments relating to the Columbia 
Acquisition Properties, the Main Street Acquisition Properties, 1336 
Enterprise Drive, Kings Manor, Greentree Executive Campus, Five Eves Drive, 
the TA Properties, the Emmes Properties, 748 & 855 Springdale Drive, 1974 
Sproul Road, the Berwyn Park Properties, the Green Hills Properties, 500/501 
Office Center Drive, Christiana Corporate Center, Metropolitan Industrial 
Center, Atrium 1, 5 & 6 Cherry Hill Executive Campus, 220 Commerce Drive, 
Provident Place, the PECO Building, Bala Pointe Office Centre, the 
Scarborough Properties and the GMH Properties for the nine months ended 
September 30, 1997 and other pro forma adjustments to reflect the March 1997 
Offering, the July 1997 Offering, the September 1997 Offering and the 
December 1997 Offering for the nine months ended September 30, 1997. The 
operating results reflected below include the historical results and related 
pro forma adjustments to reflect the period January 1, 1997 through the 
earlier of the respective acquisition date or September 30, 1997.
 
                                       F-12
<PAGE>

<TABLE>
<CAPTION>
                                                              COLUMBIA     MAIN STREET      1336                    GREENTREE
                                                             ACQUISITION   ACQUISITION   ENTERPRISE                 EXECUTIVE
                                                             PROPERTIES    PROPERTIES      DRIVE      KINGS MANOR    CAMPUS
                                                             -----------   -----------   ----------   -----------   ---------
<S>                                                          <C>           <C>           <C>          <C>           <C>
Revenue:
    Base rents.............................................     $338          $542          $78          $105         $602
    Tenant reimbursements..................................       24            60           13            27           17
    Other..................................................       25            --           --            --           --
                                                               -----         -----          ---         -----       ---------
        Total revenue......................................      387           602           91           132          619
                                                               -----         -----          ---         -----       ---------
Operating Expenses:
    Interest (i)...........................................      110            --           --            --          249
    Depreciation and amortization (ii).....................       66           109           21            29          106
    Property expenses......................................      130           379           19            43          272
    General and administrative.............................       --            --           --            --           --
                                                               -----         -----          ---         -----       ---------
        Total operating expenses...........................      306           488           40            72          627
                                                               -----         -----          ---         -----       ---------
Income (loss) before equity in income of management company
  and minority interest....................................       81           114           51            60           (8)
Equity in income (loss) of management company (iii)........       --            --           --            --           --
                                                               -----         -----          ---         -----       ---------
Income (loss) before minority interest.....................       81           114           51            60           (8)
Minority interest in (income) loss.........................       (2)           (3)          (1)           (2)          --
                                                               -----         -----          ---         -----       ---------
Net income.................................................     $ 79          $111          $50          $ 58         $ (8)
                                                               -----         -----          ---         -----       ---------
                                                               -----         -----          ---         -----       ---------
 
<CAPTION>
 
                                                             FIVE EVES
                                                               DRIVE
                                                             ---------
<S>                                                          <C>
Revenue:
    Base rents.............................................    $103
    Tenant reimbursements..................................      12
    Other..................................................      --
                                                             ---------
        Total revenue......................................     115
                                                             ---------
Operating Expenses:
    Interest (i)...........................................      75
    Depreciation and amortization (ii).....................      32
    Property expenses......................................      45
    General and administrative.............................      --
                                                             ---------
        Total operating expenses...........................     152
                                                             ---------
Income (loss) before equity in income of management company
  and minority interest....................................     (37)
Equity in income (loss) of management company (iii)........      --
                                                             ---------
Income (loss) before minority interest.....................     (37)
Minority interest in (income) loss.........................       1
                                                             ---------
Net income.................................................    $(36)
                                                             ---------
                                                             ---------
</TABLE>
<TABLE>
<CAPTION>
                                                                                     748 & 855
                                                               TA         EMMES      SPRINGDALE   1974 SPROUL   MARCH 1997
                                                            PROPERTIES  PROPERTIES     DRIVE         ROAD        OFFERING
                                                            ---------   ----------   ----------   -----------   ----------
<S>                                                         <C>         <C>          <C>          <C>           <C>
Revenue:
    Base rents............................................   $2,053       $2,570        $414        $  354         $--
    Tenant reimbursements.................................      299        1,130          --            54          --
    Other.................................................        6            2          --            --          --
                                                            ---------   ----------     -----      -----------      ---
        Total revenue.....................................    2,358        3,702         414           408          --
                                                            ---------   ----------     -----      -----------      ---
Operating Expenses:
    Interest (i)..........................................    1,241        2,049         171            --         (91)
    Depreciation and amortization (ii)....................      530          875          73            61          --
    Property expenses.....................................      698        1,332          99           225          --
    General and administrative............................       --           --          --            --          --
                                                            ---------   ----------     -----      -----------      ---
        Total operating expenses..........................    2,469        4,256         343           286         (91)
                                                            ---------   ----------     -----      -----------      ---
Income (loss) before equity in income of management
  company and minority interest...........................     (111)        (554)         71           122          91
Equity in income (loss) of management company (iii).......       41           27          10            10          --
                                                            ---------   ----------     -----      -----------      ---
Income (loss) before minority interest....................      (70)        (527)         81           132          91
Minority interest in (income) loss........................        2           15          (2)           (4)        (52)
                                                            ---------   ----------     -----      -----------      ---
Net income................................................     $(68)      $ (512)       $ 79        $  128         $39
                                                            ---------   ----------     -----      -----------      ---
                                                            ---------   ----------     -----      -----------      ---
 
<CAPTION>
 
                                                            JULY 1997
                                                            OFFERING
                                                            ---------
<S>                                                         <C>
Revenue:
    Base rents............................................   $   --
    Tenant reimbursements.................................       --
    Other.................................................       --
                                                            ---------
        Total revenue.....................................       --
                                                            ---------
Operating Expenses:
    Interest (i)..........................................   (6,904)
    Depreciation and amortization (ii)....................       --
    Property expenses.....................................       --
    General and administrative............................       --
                                                            ---------
        Total operating expenses..........................   (6,904)
                                                            ---------
Income (loss) before equity in income of management
  company and minority interest...........................    6,904
Equity in income (loss) of management company (iii).......       --
                                                            ---------
Income (loss) before minority interest....................    6,904
Minority interest in (income) loss........................      (42)
                                                            ---------
Net income................................................   $6,862
                                                            ---------
                                                            ---------
</TABLE>
 
                                        F-13
<PAGE>

<TABLE>
<CAPTION>
                                                                                                        CHRISTIANA   METROPOLITAN
                                                       BERWYN PARK     GREEN HILLS     500/501 OFFICE   CORPORATE     INDUSTRIAL
                                                       PROPERTIES    PROPERTIES (IV)    CENTER DRIVE      CENTER        CENTER
                                                       -----------   ---------------   --------------   ----------   ------------
<S>                                                    <C>           <C>               <C>              <C>          <C>
Revenue:
    Base rents.......................................    $2,492          $4,567            $1,106          $615         $1,395
    Tenant reimbursements............................       376              --               919            22            306
    Other............................................        36              --                48            45             33
                                                       -----------       ------            ------         -----         ------
        Total revenue................................     2,904           4,567             2,073           682          1,734
                                                       -----------       ------            ------         -----         ------
Operating Expenses:
    Interest (i).....................................        --             690               700           309            926
    Depreciation and amortization (ii)...............       700             745               340           131            395
    Property expenses................................     1,073           2,059               971           218            472
    General and administrative.......................        --              --                --            --             --
                                                       -----------       ------            ------         -----         ------
        Total operating expenses.....................     1,773           3,494             2,011           658          1,793
                                                       -----------       ------            ------         -----         ------
Income (loss) before equity in income of management
  company and minority interest......................     1,131           1,073                62            24            (59)
Equity in income (loss) of management company
  (iii)..............................................        95             (66)               44             4             40
                                                       -----------       ------            ------         -----         ------
Income (loss) before minority interest...............     1,226           1,007               106            28            (19)
Minority interest in (income) loss...................       (36)            (30)               (3)           (1)             1
                                                       -----------       ------            ------         -----         ------
Net income...........................................    $1,190          $  977            $  103          $ 27         $  (18)
                                                       -----------       ------            ------         -----         ------
                                                       -----------       ------            ------         -----         ------
 
<CAPTION>
 
                                                       ATRIUM 1
                                                       --------
<S>                                                    <C>
Revenue:
    Base rents.......................................   $ 962
    Tenant reimbursements............................      33
    Other............................................      26
                                                       --------
        Total revenue................................   1,021
                                                       --------
Operating Expenses:
    Interest (i).....................................     577
    Depreciation and amortization (ii)...............     246
    Property expenses................................     555
    General and administrative.......................      --
                                                       --------
        Total operating expenses.....................   1,378
                                                       --------
Income (loss) before equity in income of management
  company and minority interest......................    (357)
Equity in income (loss) of management company
  (iii)..............................................      23
                                                       --------
Income (loss) before minority interest...............    (334)
Minority interest in (income) loss...................      10
                                                       --------
Net income...........................................   $(324)
                                                       --------
                                                       --------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                       5 & 6
                                                                       CHERRY
                                                                        HILL        220
                                                       SEPTEMBER     EXECUTIVE    COMMERCE   PROVIDENT       PECO    
                                                     1997 OFFERING     CAMPUS      DRIVE       PLACE     BUILDING (V)
                                                     -------------   ----------   --------   ---------   ------------
<S>                                                  <C>             <C>          <C>        <C>         <C>         
Revenue:
    Base rents.....................................       $--            $114       52$5       $567          $762    
    Tenant reimbursements..........................        --              --        --          79            --    
    Other..........................................        --              --        --           6            --    
                                                          ---        ----------   --------   ---------      -----    
        Total revenue..............................        --             114       525         652           762    
                                                          ---        ----------   --------   ---------      -----    
Operating Expenses:
    Interest (i)...................................        --             197       304         362           541    
    Depreciation and amortization (ii).............        --              84       130         154           231    
    Property expenses..............................        --             126       164         249            --    
    General and administrative.....................        --              --        --          --            --    
                                                          ---        ----------   --------   ---------      -----    
        Total operating expenses...................        --             407       598         765           772    
                                                          ---        ----------   --------   ---------      -----    
Income (loss) before equity in income of management
  company and minority interest....................        --            (293  )    (73   )    (113)          (10)   
Equity in income (loss) of management company
  (iii)............................................        --              --         9          13            --    
                                                          ---        ----------   --------   ---------      -----    
Income (loss) before minority interest.............        --            (293  )    (64   )    (100)          (10)   
Minority interest in (income) loss.................        26               9         2           3            --    
                                                          ---        ----------   --------   ---------      -----    
Net income.........................................       $26            $(284 )    (6$2  )    $(97)         $(10)   
                                                          ---        ----------   --------   ---------      -----    
                                                          ---        ----------   --------   ---------      -----    
</TABLE>

                                          F-14 
<PAGE>
 
<TABLE>
<CAPTION>
                                                          DECEMBER 1997    BALA POINTE    SCARBOROUGH      GMH       TOTAL OTHER
                                                            OFFERING      OFFICE CENTRE   PROPERTIES    PROPERTIES   1997 EVENTS
                                                          -------------   -------------   -----------   ----------   -----------
<S>                                                       <C>             <C>             <C>           <C>          <C>
Revenue:
    Base rents..........................................      $ --           $2,837         $4,292       $18,735       $46,128
    Tenant reimbursements...............................        --               27            425         1,449         5,272
    Other...............................................        --               28             17           130           402
                                                               ---           ------       -----------   ----------   -----------
        Total revenue...................................        --            2,892          4,734        20,314        51,802
                                                               ---           ------       -----------   ----------   -----------
Operating Expenses:
    Interest (i)........................................      (987)           1,523          1,549        12,940        16,531
    Depreciation and amortization (ii)..................        --              650            890         5,521        12,119
    Property expenses...................................        --            1,243          1,834         8,179        20,385
    General and administrative..........................        --               --             --            --            --
                                                               ---           ------       -----------   ----------   -----------
        Total operating expenses........................      (987)           3,416          4,273        26,640        49,035
                                                               ---           ------       -----------   ----------   -----------
Income (loss) before equity in income of management
  company and minority interest.........................       987             (524)           461        (6,326)        2,767
Equity in income (loss) of management company (iii).....        --               48             89           411           798
                                                               ---           ------       -----------   ----------   -----------
Income (loss) before minority interest..................       987             (476)           550        (5,915)        3,565
Minority interest in (income) loss......................       (29)              14           (155)          174          (105)
                                                               ---           ------       -----------   ----------   -----------
Net income..............................................      $958           $ (462)        $  395       $(5,741)      $ 3,460
                                                               ---           ------       -----------   ----------   -----------
                                                               ---           ------       -----------   ----------   -----------
</TABLE>
 
- ------------------------
(i) Pro forma interest expense is presented assuming an effective rate of 7.5%
    on borrowings under the Company's revolving credit facility. The adjustment
    for the Columbia Acquisition Properties also reflects an effective interest
    rate of 9.5% on assumed debt. The adjustments for the March 1997 Offering,
    the July 1997 Offering and the December 1997 Offering represent interest 
    savings related to the payoff of $7 million and $160.8 million, 
    respectively, of credit facility borrowings at an effective rate of 7.5%.

(ii) Pro forma depreciation expense is presented assuming an 80% building and
    20% land allocation of the purchase price and capitalized closing costs and
    assumes a useful life of 25 years.

(iii) Pro forma equity in income of management company is presented based on
    management fees less incremental costs estimated to be incurred.

(iv) Pro forma property expenses for the Green Hill Properties exclude $333,000
    from historical amounts. Such amount represents expected salary savings.
 
(v) Pro forma base rents for the Peco Building are based on the lease in place
    as of November 25, 1997 as historically the property was owner occupied and
    was not an operating property. All property expenses are paid directly by
    the tenant.

                                      F-15
<PAGE>

    (E) Reflects the pro forma statements of operations of the RREEF 
Properties for the nine months ended September 30, 1997 and for the year 
ended December 31, 1996. All amounts represent historical operations except 
for the pro forma adjustments noted: 

    - For the nine months ended September 30, 1997:
 
<TABLE>
<CAPTION>
                                                                             RREEF     
                                                                          Properties   
                                                                          -----------  
<S>                                                                       <C>          
Revenue:
  Base rents............................................................   $   3,120   
  Tenant reimbursements.................................................         529   
  Other.................................................................      --       
                                                                          -----------  
    Total revenue.......................................................       3,649   
                                                                          -----------  
Operating Expenses:
  Interest (i)..........................................................       3,180   
  Depreciation and amortization (ii)....................................       1,357   
  Property expenses.....................................................         939   
  General and administrative............................................      --       
                                                                          -----------  
    Total operating expenses............................................       5,476   
                                                                          -----------  
Income (loss) before equity in income of management company and minority
  interest..............................................................      (1,827)  
Equity in income (loss) of management company (iii).....................          73   
                                                                          -----------  
Income (loss) before minority interest..................................      (1,754)  
Minority interest in (income) loss......................................          52   
                                                                          -----------  
Net income                                                                 $  (1,702)  
                                                                          -----------  
                                                                          -----------  
</TABLE>
    -For the year ended December 31, 1996:
 
<TABLE>
<CAPTION>
                                                                             RREEF     
                                                                          PROPERTIES   
                                                                          -----------  
<S>                                                                       <C>          
Revenue:
  Base rents............................................................   $   4,051   
  Tenant reimbursements.................................................         643   
  Other.................................................................      --       
                                                                          -----------  
    Total revenue.......................................................       4,694   
                                                                          -----------  
Operating Expenses:
  Interest (i)..........................................................       4,251   
  Depreciation and amortization (ii)....................................       1,814   
  Property expenses.....................................................       1,288   
  General and administrative............................................      --       
                                                                          -----------  
    Total operating expenses............................................       7,353   
                                                                          -----------  
Income (loss) before equity in income of management company and minority
  interest..............................................................      (2,659)  
Equity in income (loss) of management company (iii).....................          97   
                                                                          -----------  
Income (loss) before minority interest..................................      (2,562)  
Minority interest in (income) loss......................................          75   
                                                                          -----------  
Net income                                                                 $  (2,487)  
                                                                          -----------  
                                                                          -----------  
</TABLE>
 
- ------------------------
 
(i)   Pro forma a interest expense is presented assuming an effective rate of 
      7.5% on borrowings under the Company's revolving credit facility.
 
(ii)  Pro forma depreciation expense is presented assuming an 80% building and
      20% land allocation of the purchase price and capitalized closing costs 
      and assumes a useful life of 25 years.
 
(iii) Pro forma equity in income of management company is presented based on
      management fees less incremental costs estimated to be incurred.
 
                                       F-16

<PAGE>

                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
    To Brandywine Realty Trust:
 
    We have audited the combined statement of revenue and certain expenses of
The RREEF Properties described in Note 1, for the year ended December 31, 1996.
This financial statement is the responsibility of the Properties' management.
Our responsibility is to express an opinion on this financial statement based on
our audit.
 
    We conducted our audit in accordance with generally accepted auditing 
standards. Those standards require that we plan and perform the audit to 
obtain reasonable assurance about whether the financial statement is free of 
material misstatement. An audit includes examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statement. An audit 
also includes assessing the accounting principles used and significant 
estimates made by management, as well as evaluating the overall financial 
statement presentation. We believe that our audit provides a reasonable basis 
for our opinion.
 
    The combined statement of revenue and certain expenses was prepared for the
purpose of complying with the rules and regulations of the Securities and
Exchange Commission for inclusion in a current report on Form 8-K of Brandywine
Realty Trust, as described in Note 1, and is not intended to be a complete
presentation of the The RREEF Properties' revenue and expenses.
 
    In our opinion, the financial statement referred to above presents fairly,
in all material respects, the revenue and certain expenses of The RREEF
Properties for the year ended December 31, 1996, in conformity with generally
accepted accounting principles.
     






                                             ARTHUR ANDERSEN LLP





    Philadelphia, Pa.,
    January 22, 1998







                                       F-17
 
<PAGE>

                              THE RREEF PROPERTIES
 
          COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES (NOTE 1)
 
<TABLE>
<CAPTION>
                                                                                                    
                                                                                        For the     For the Nine
                                                                                       Year Ended   Months Ended
                                                                                      December 31,  September 30,
                                                                                          1996          1997
                                                                                      ------------  -------------
                                                                                                     (Unaudited)
<S>                                                                                   <C>           <C>
REVENUE:
  Minimum rent (Note 2).............................................................  $ 4,051,000    $ 3,120,000
  Tenant reimbursements.............................................................      643,000        529,000
                                                                                      ------------  -------------
    Total revenue...................................................................    4,694,000      3,649,000
                                                                                      ------------  -------------
CERTAIN EXPENSES:
  Maintenance and other operating expenses..........................................      625,000        403,000
  Utilities.........................................................................      182,000        161,000
  Real estate taxes.................................................................      481,000        375,000
                                                                                      ------------  -------------
    Total certain expenses..........................................................    1,288,000        939,000
                                                                                      ------------  -------------
REVENUE IN EXCESS OF CERTAIN EXPENSES...............................................  $ 3,406,000    $ 2,710,000
                                                                                      ------------  -------------
                                                                                      ------------  -------------
</TABLE>
 
    The accompanying notes are an integral part of this financial statement.
 



                                       F-18

<PAGE>

                              THE RREEF PROPERTIES
 
        NOTES TO THE COMBINED STATEMENT OF REVENUE AND CERTAIN EXPENSES
                               DECEMBER 31, 1996
 
1. BASIS OF PRESENTATION:
 
    The combined statement of revenue and certain expenses reflects the 
combined operations of The RREEF Properties (the "Properties"). The 
Properties are expected to be acquired in February 1998 by Brandywine Realty 
Trust (the "Company") under related sales agreement with RREEF USA Fund--I, 
RREEF MidAmerica East-IV, and RREEF MidAmerica East-V (collectively the 
"RREEF Funds"). The properties consist of the King of Prussia Industrial Park 
(12 buildings and one plot of land behind 600 Allendale Road), King of 
Prussia, PA, 741 First Avenue, King of Prussia, PA, and 180 Wheeler Court, 
Middletown, PA. The Properties have an aggregate net rentable area of 
approximately 940,213 square feet (90% leased as of December 31, 1996). The 
expected purchase price is approximately $55.5 million. This combined 
statement of revenue and certain expenses is to be included in the Company's 
current report on Form 8-K, as the above described transaction has been 
deemed significant pursuant to the rules and regulations of the Securities 
and Exchange Commission.
 
    The accounting records of the Property are maintained on an accrual 
basis. Adjusting entries have been made to present the accompanying financial 
statements in accordance with generally accepted accounting principles. The 
accompanying financial statements exclude certain expenses such as interest, 
depreciation and amortization, and other costs not directly related to the 
future operations of the Properties.
 
    The preparation of financial statements in conformity with generally 
accepted accounting principles requires management to make estimates and 
assumptions that affect the reported amounts of assets and liabilities and 
disclosure of contingent assets and liabilities at the date of the financial 
statements and the reported amounts of revenue and expenses during the 
reporting period. The ultimate results could differ from those estimates.
 
    The statement of revenue and certain expenses for the nine months ended 
September 30, 1997 is unaudited; however, in the opinion of management, all 
adjustments (consisting solely of normal recurring adjustments) necessary for 
the fair presentation of the statement of revenue and certain expenses for 
the interim period have been included. The results of the interim periods are 
not necessarily indicative of the results for the full year.


                                     F-19

<PAGE>

2. OPERATING LEASES:
 
    Base rents presented for the year ended December 31, 1996, include 
straight-line adjustments for rental revenue increases in accordance with 
generally accepted accounting principles. The aggregate rental revenue 
decreases resulting from the straight-line adjustment for the year ended 
December 31, 1996 and the nine months ended September 30, 1997 were $(52,000) 
and $(95,000) (unaudited), respectively.
 
    The following tenants had minimum rental payments greater than 10% of the 
total minimum rent in 1996:
 
<TABLE>
<S>                                               <C>
     Smithkline Beecham Corporation...............  $ 470,000
     Tozour-Trane, Inc............................  $ 540,000
</TABLE>
 
    The Properties are leased to tenants under operating leases with 
expiration dates extending to the year 2005. Future minimum rentals under 
noncancelable operating leases, excluding tenant reimbursements of operating 
expenses as of December 31, 1996, are as follows:
 
<TABLE>
<S>                                            <C>
          1997...................................   $4,088,000
          1998...................................    3,308,000
          1999...................................    3,141,000
          2000...................................    3,016,000
          2001...................................    2,665,000
          Thereafter.............................    3,026,000
                                                   -----------
                                                   $19,244,000
                                                   -----------
                                                   -----------

</TABLE>
 
    Certain leases also include provisions requiring tenants to reimburse the 
Property for management costs and other operating expenses up to stipulated 
amounts.
 
3. RELATED PARTY TRANSACTIONS:
 
    The Properties paid management fees of $205,000 to RREEF Management 
Company, a related party, based on percentages as defined in the management 
agreement. These management fees are included within maintenance and other 
operating expenses in the statement of revenue and certain expenses.
 
    RREEF Management Company leases 3,344 square feet at a minimal annual 
base rental of $24,000 and receives 1,530 square feet of free rental space at 
one of the Properties. Per the lease agreement, the lease terminates on the 
earlier of (1) one year after RREEF USA Fund-I sells its interest in the 
building or (2) 30 days after RREEF Management Company notifies the landlord 
of its election to terminate.


                                     F-20


<PAGE>


                         January 20, 1998


Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
One Tower Bridge
100 West Front Street
West Conshohocken, Pennsylvania  19428

Attention:  Donald W. Pulver


Dear Mr. Pulver:

     Brandywine Operating Partnership, L.P., a Delaware limited partnership, or
its affiliate  ("Lender"), hereby offers to make a loan ("Loan") to Four Tower
Bridge Associates, a Pennsylvania limited partnership ("Borrower"), for term
financing for Four Tower Bridge, West Conshohocken Borough, Montgomery County,
Pennsylvania (the "Real Property"), inclusive of the 82,000+- square foot
mid-rise office building to be constructed thereon (the building, parking and
related improvements being collectively referred to as "Improvements"), all on
the terms and conditions set forth herein:

     1.   Amount; Purpose.

          (a)  The Loan shall be in the principal amount of up to $10,000,000,
or such lesser amount as shall actually be necessary to fund costs for
development of the Improvements in excess of funds to be advanced under Section
3.07 of that certain Agreement of Limited Partnership of Borrower, and shall be
evidenced by a promissory note in such aggregate principal amount executed by
Borrower and made payable to the order of Lender ("Note").

          (b)  The Loan shall be used by Borrower solely to partially refinance
the cost of acquisition of the Real Property and construction of the
Improvements. 

     2.   Interest Rate.  The Loan shall provide for interest to be paid on the
unpaid principal balance outstanding from time to time, at a per annum rate
equal to a 30, 60 or 90 day (as determined by Lender) LIBOR + 250 basis points. 
The Loan shall mature ten (10) years from its funding.  Interest only shall be
paid in advance for the month in which the loan closing ("Closing") shall occur,
followed by 35 payments of interest only, payable in arrears, commencing on the
fifteenth (15th) day of the second month following the date of the Closing and
each succeeding month thereafter, followed by 84 payments of interest and
principal, also payable in arrears, with all unpaid interest and principal due
on the maturity date.  Amortization of the Loan is based upon a thirty (30) year
schedule.



<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 2


     3.   Payment Terms.

          (a)  Borrower shall have the right, prior to the Maturity Date, to
prepay the unpaid principal balance of the Note without premium or penalty,
subject to and upon the terms and conditions governing the prepayment of
indebtedness to be set forth in definitive loan documents.

          (b)  Any prepayment, whether voluntary or involuntary, shall be
applied first to any accrued and unpaid interest under the Note up to the date
of such prepayment, and then to any other sums which may be payable to Lender
under the Loan Documents up to the date of such prepayment, and then to the
outstanding principal balance of the Note, any such prepayment applied to
principal shall be applied to the principal portions of installments due under
the Note in the inverse order of their maturity, and the acceptance of any such
prepayment when there is an event of default in existence under any of the Loan
Documents shall not constitute a waiver, release or accord and satisfaction
thereof or of any rights with respect thereto by Lender.

          (c)  The Note shall provide for a late payment charge of four (4%)
percent of any principal, interest or other amount not paid when due, and a rate
of interest after the occurrence of an event of default under the Loan Documents
("Default Rate") of four (4%) percent in excess of the interest rate then
payable under the Note pursuant to paragraph 2 above. 

          (d)   Borrower shall reimburse Lender for any and all fees, costs and
expenses Lender may incur in connection with making, disbursing, administering
and enforcing the Loan contemplated hereby.  Without limitation of any
provisions set forth herein or in the Loan Documents, Borrower shall indemnify,
defend and save and hold harmless Lender of, from and against any and all loss,
cost, expense, damage and liability which Lender or Lender's affiliates may
suffer, sustain or incur by reason of, or arising out of Borrower's breach,
violation or default under, or other failure to timely and fully pay and perform
its obligations under the Loan.

     4.   Loan Documents; Security.  The Loan evidenced by the Note shall be
governed and secured, inter alia, as follows:

          (a)  a first, insured Open-End Mortgage and Security Agreement
covering the Real Property and Improvements from Borrower to Lender
("Mortgage");

          (b)  a first Assignment of Leases and Rents from Borrower to Lender
relating to all leases affecting all or any portion of the Real Property
("Assignment of Leases and Rents");

<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 3

          (c)  a first Assignment of Borrower's interests under contracts,
licenses and permits, documents and rights relating to the property as specified
by Lender ("Assignments of Contracts");

          (d)  Uniform Commercial Code financing statements executed by Borrower
in favor of Lender, perfecting Lender's first security interests granted by
Borrower pursuant to the Mortgage in all tangible and intangible personal
property which at the time of the Loan Closing or thereafter is located on or
used in connection with the Real Property ("UCC's");

          (e)  an Environmental Indemnification Agreement furnished by 
Borrower with which Borrower shall indemnify and hold Lender harmless of and
from any and all loss, cost, expense, damage or liability relating to the
environmental condition of the Real Property or the presence of hazardous wastes
thereon.

     5.   Loan Closing Date.  Lender's obligation to fund under this Commitment
shall terminate on the earlier of (i) the date which is eighteen (18) months
after the date hereof and (ii) the date on which any alternate financing
contemplated by Section 18 below is funded and the Construction Loan from PNC
Bank, National Association made to Borrower on the date hereof is repaid from
the proceeds thereof.

     6.   Composition of Borrower.  During the term of the Loan, Borrower shall
be and remain a Pennsylvania limited partnership, validly existing and in good
standing under the laws of the Commonwealth of Pennsylvania, in which Four
Oliver Tower Associates and Brandywine TB I, L.P., or its affiliate, shall be
and remain its sole partners.

     7.   General and Special Conditions.  The General Conditions attached
hereto are an integral part of this Commitment and are incorporated herein by
this reference.  The General Conditions shall not in any way diminish any of the
terms, conditions or requirements set forth herein, and such General Conditions
shall be interpreted to augment, supplement and complement such terms,
conditions and requirements.  In addition to the General Conditions and any
other conditions that may be set forth in the Loan Documents, Lender's
obligation to make the Loan shall be specifically subject to the following
conditions:

          (a)  Intentionally Omitted.

          (b)  Intentionally Omitted.

          (c)  Intentionally Omitted.



<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 4


          (d)  Certificate of Occupancy:  Borrower shall deliver to Lender a
current, final certificate of occupancy for the building issued by the
Commonwealth of Pennsylvania Department of Labor and Industry and by Montgomery
County (or by other appropriate governmental authorities) and evidence
satisfactory to Lender demonstrating compliance with all zoning, building,
health, fire, traffic, safety, environmental, wetlands and such other rules,
regulations, ordinances, statutes and requirements applicable to the property
and the improvements relating thereto.

     8.   Fees and Costs.  Acceptance of this Commitment shall constitute
Borrower's unconditional agreement, if and when the Loan Closing occurs, to pay
all fees, including a closing fee equal to one (1%) percent of the Loan,
expenses, taxes, costs and charges in respect to the Loan, or in any way
connected therewith, including but not limited to Lender's reasonable counsel
fees and costs, title insurance premiums and search fees, survey costs,
environmental audit costs, appraisal costs, recording and filing fees and site
inspection fees of Lender.

     9.   Tax and Insurance Escrows.  Real estate taxes and insurance premiums
shall be paid or caused to be paid by Borrower timely, and Borrower shall be
required to furnish Lender with paid receipts therefor.  The Mortgage shall
reserve to Lender upon an event of default the option to collect monthly from
Borrower and hold in escrow amounts sufficient to pay real estate taxes, water
and sewer charges and assessments, other lienable assessments and insurance
premiums, irrespective of whether such items are paid by the tenants under any
executed leases relating to space on the Real Property.  Lender shall release
such amounts to Borrower from time to time upon proof of the payment of such
items by Borrower.

     10.  Accuracy of Information.  Borrower represents to Lender that all
documents and/or information provided to Lender by Borrower in connection with
the issuance of this Commitment are true and correct in all material respects
and Borrower further acknowledges that the issuance of this Commitment by Lender
is in reliance upon the accuracy and truth of such documents and/or information.

     11.  Waiver of Trial by Jury.  Borrower hereby knowingly, voluntarily and
intentionally waives the right it may have to a trial by jury in respect of any
litigation based hereon, arising out of, under or in connection with this
Commitment or the Loan and any document contemplated to be executed in
conjunction herewith or therewith, or any course of conduct, course of dealing,
statements (whether verbal or written) or actions of Borrower or Lender.  This
provision is a material inducement for Lender entering into this Commitment.


<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 5


     12.  Brokerage and Other Fees.  Borrower agrees to indemnify and hold
Lender harmless against the claims of any and all brokers or agents and from
claims for any commissions, fees or other amounts owned or claimed to be owed
regarding the Loan and/or the Real Property and Improvements.

     13.  Non-Recourse. The Loan shall be non-recourse to the Borrower, subject
to specific "carve-outs" to be set forth in the definitive loan documents,
including, without limitation, (a) fraud or intentional misrepresentation, (b)
environmental liabilities and (c) misapplication of loan proceeds, rental or
other income, security deposits, insurance proceeds or condemnation awards.

     14.  Lender's Review.  Lender and its agents may inspect the plans and
specifications, the Project Budget, the course of construction and other matters
pertaining to construction of the Building and Improvements.  Lender will accept
Valcon as its inspector.  Borrower acknowledges and agrees that such inspections
are made solely for the protection of the Lender in its capacity as Lender, and
Borrower confirms that the Lender is not making and will not be deemed to be
making any representations or warranties as to any matters pertaining to the
Building or Improvements by reason of such inspections or by reason of advances
made by the Lender under the Loan Documents.  Without limitation of any of the
foregoing, Borrower has selected the general contractor, all major
subcontractors, the project architect and engineer, and all other consultants
providing professional services with respect to the Project, and Lender, in its
capacity as such, has not and shall not have any responsibility for their
selection nor for the quality of their materials, their services, or
workmanship.  Neither the Borrower nor any other person shall have any right to
rely on any procedures required by the Lender herein, such procedures being
solely for the protection of the Lender, in its capacity as lender.

     Following acceptance of this Commitment and prior to the Closing, Borrower
shall provide to Lender a copy of all periodic architect's reports by the
architect of record and by the construction lender's architect/engineer within
thirty (30) days of submission during the entire period of construction.  In
addition to the foregoing, Borrower shall provide to Lender a lease schedule
provided during each calendar quarter of the initial lease-up period of the
property containing not less than the following information:  tenant name, lease
term, lease commencement, date of occupancy, monthly rent, concessions, unit
size and unit leased.

     15.  No Off-set.  Anything herein contained to the contrary 
notwithstanding, the Borrower and Lender specifically acknowledge and agree 
that Lender shall not have the right to offset its commitment to lend 
hereunder against distributions or other sums paid or to be paid to 
Brandywine TB I, L.P., in its capacity as a partner of Borrower, and Borrower 
shall not have the

<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 6


right to offset distributions or other sums due Brandywine TB I, L.P. as a 
partner of Borrower, against Lender's commitment to lend hereunder.

     16.  Borrower and Lender.  Lender and Borrower acknowledge and agree that
their respective obligations to one another hereunder and under the Loan
Documents are in addition to, and shall be independent of, any obligations of
Borrower to its partners, and the obligations of Borrower's partners, each to
the other.  Borrower, Four Oliver Tower Corporation and Four Oliver Tower
Associates expressly acknowledge and agree that Lender has no fiduciary duty or
fiduciary obligation of any kind to them by reason of this Commitment or the
Loan, or any of them, and Lender is and shall be free to exercise any and all
rights and remedies reserved to Lender hereunder and under the Loan Documents,
notwithstanding that Brandywine TB I, L.P., an affiliate of Brandywine Operating
Partnership, is a partner in Borrower.

     17.  Exculpation.  No recourse shall be had for any obligation of
Brandywine Realty Trust under this Commitment or under any document executed in
connection herewith or pursuant hereto, or for any claim based thereon or
otherwise in respect thereof, against any past, present or future trustee,
shareholder, officer or employee of Brandywine Realty Trust, whether by  virtue
of any statute or rule of law, or by the enforcement of any assessment or
penalty or otherwise,  all such liability being expressly waived and released by
the Borrower and all parties claiming by, through or under Borrower.

     18.  Alternate Financing.  Lender acknowledges and agrees that nothing
herein prevents Borrower from obtaining alternate financing in lieu of the Loan,
and that by executing the acceptance attached hereto Borrower is not obligated
to accept the Loan from Lender, but only to accept the terms set forth herein if
Borrower elects to accept the Loan.  Lender's commitment to make the Loan
hereunder will remain in effect and available to Borrower until such time as any
such alternate financing is funded.

                  [remainder of this page left intentionally blank]


<PAGE>

Four Tower Bridge Associates
c/o Four Oliver Tower Associates,
  Managing General Partner
Attention:  Donald W. Pulver
January 20, 1998
Page 7
 
     19.  Acceptance; Termination. The acceptance of this Commitment shall be
evidenced by the return of the enclosed copy hereof executed by Borrower, within
three (3) days from the date hereof.  Unless this Commitment is so accepted, it
shall become null and void.

                              Very truly yours,

                              Brandywine Operating Partnership, L. P. , a
                              Delaware limited partnership

                              By:  Brandywine Realty Trust, a Maryland real 
                                   estate investment trust, its General Partner

                                   By: /s/ Anthony A. Nichols, Sr.             
                                       ---------------------------
                                        Name:  Anthony A. Nichols, Sr.
                                        Title:    Chairman of the Board


<PAGE>

 
                                     ACCEPTANCE

     Intending to be legally bound, the undersigned hereby accept the foregoing
Commitment and agree to the terms and conditions thereof.


                                   FOUR TOWER BRIDGE ASSOCIATES, a Pennsylvania 
                                   limited partnership

                                   By:  FOUR OLIVER TOWER ASSOCIATES, a
                                        Pennsylvania limited partnership

                                        By:  FOUR OLIVER TOWER CORPORATION, a
                                             Pennsylvania corporation, its duly
                                             authorized general partner


                                             By: /s/ Donald W. Pulver     
                                                 --------------------
                                                  Donald W. Pulver, President

                                   By:  BRANDYWINE TB I, L.P., a Pennsylvania
                                        limited partnership

                                        By:  BRANDYWINE TB I, L.L.C., a
                                             Pennsylvania limited liability
                                             company


                                             By:/s/ Anthony A. Nichols, Sr. 
                                                ---------------------------
                                                  Name:  Anthony A. Nichols, Sr.
                                                  Title:  Chairman

<PAGE>
                               

                                          
                                 GENERAL CONDITIONS


          The following General Conditions are an integral part of this
commitment:

     1.   Documents and Information to be Furnished to Lender Before Loan
Closing.  At least ten (10) business days prior to the scheduled date of the
Loan Closing, Borrower must obtain at its expense and submit to Lender the
documents and information set forth below.  Such documentation and information
shall be subject to Lender's review and approval, both as to form and substance,
and shall be updated and effective at the time of Loan Closing.  None of the
materials provided by Borrower shall vary in any material respect from the
information and materials previously provided to Lender in order to induce
Lender to underwrite and approve the Loan.

          (a)  A currently dated title report, in form and substance
satisfactory to Lender, issued by Lawyers Title Insurance Corporation, covering
the Real Property, which contains copies of all identified documents referred to
therein.  The title report shall stipulate that title insurance, in a form
approved by Lender, shall be issued to Lender at time of the Loan Closing which
shall insure Lender as the holder of a valid first mortgage lien for the full
amount of the Mortgage, free and clear of all liens (including mechanic's liens
filed or unfiled), encumbrances and exceptions other than those which may be
approved by Lender. 

          (b)  A current ALTA/ASCM as-built survey of the Real Property,
certified to and acceptable to Lender and to Lawyers Title Insurance
Corporation, issuing the title insurance, showing such items as Lender shall
specify, together with a metes and bounds description of the Real Property
corresponding to such survey.

          (c)  Any and all lease agreements relating to any portion of the Real
Property, and any form of proposed lease agreement to be used by Borrower in
connection with the Real Property during the term of the Loan.

          (d)  Borrower's Agreement of Limited Partnership, Certificate of
Limited Partnership, pertinent incumbency and signature certificates, and
resolutions authorizing the transaction.

          (e)  A written opinion of Borrower's 's counsel, who shall be
acceptable to Lender, stating that, inter alia: (i) Borrower is duly organized,
validly existing and in good standing in the Commonwealth of Pennsylvania,
authorized to do business in the Commonwealth of Pennsylvania, (ii) Borrower has
full authority and legal right to carry out the terms of this Commitment and any
other documentation required hereunder or in connection with the Loan, (iii)
Borrower has taken all necessary and appropriate action to authorize the
execution and delivery of this Commitment and all other documents required to be
executed by it in connection with the Loan, (iv) this Commitment and all other
documents required to be executed by Borrower in connection with the Loan have
been duly executed and acknowledged or witnessed, as appropriate, by Borrower,
(v) none of the aforesaid actions, undertakings and agreements contravene or
shall contravene Borrower's Partnership Agreement or Certificate of Limited 


<PAGE>

Partnership, the provisions of this Commitment, or the provisions of any
contract or agreement to which Borrower is a party or by which Borrower is bound
or any applicable law, (vi) the Note, Mortgage and all other loan documents are
valid and binding and enforceable according to their respective terms in the
state where the Real Property is located, and (vii) the Loan is not civilly
usurious.

          (f)  Fully paid fire and casualty insurance policies with extended
coverage, covering risk of loss or damage to the Real Property due to fire and
such other casualties as Lender may require, with limits equal to one hundred
percent of the full replacement cost with such company or companies approved by
Lender (but such company must have an A or better rating by Best's Rating
Service) and containing mortgagee clauses in favor of Lender in form and content
satisfactory to Lender; fully paid flood insurance policy, if determined to be
necessary by Lender; and fully paid liability insurance and workmen's
compensation insurance in such amounts as may be required by Lender or, as to
workmen's compensation, mandated by statute.

          (g)  The final as-built plans and specifications for the Building and
Improvements, which shall have been approved in writing by all necessary and
appropriate governmental authorities, the general contractor, the primary
subcontractors, and the architect, engineer and bonding company, as appropriate.

          (h)  Appraisals of the Real Property in accordance with the
requirements of Title 11 of the Financial Institutions Reform, Recovery and
Enforcement Act of 1989 ("FIRREA") based upon its fair market value currently
and upon its projected fair market value following completion of the
construction of the Building as shown in the plans and specifications, which
appraisals shall be paid for by Borrower, performed by an MAI appraiser selected
by or acceptable to Lender and acceptable in form and substance to Lender having
a value of at least Sixteen Million Seven Hundred Fifty Thousand Dollars
($16,750,000.00). 

          (i)  A Phase I Environmental Report (and the report of such further
investigations, if any, as shall be deemed appropriate by Lender), prepared by
an independent environmental engineering firm acceptable to Lender, which may be
McLarer Hart, indicating that there are no hazardous substances or wastes in, on
or around the Real Property, that the Real Property does not contain any
wetlands, that the Real Property is not located in a flood hazard area or
100-year flood plain, and otherwise in form and substance satisfactory to
Lender.

          (j)  Intentionally Omitted.

     2.   Lender's Approval of Documents and Title.  The need for and the
adequacy as to form and substance of each and every document relating to the
Loan and all questions relating to the validity, status and priority of the
security for the Loan shall be determined by and must be satisfactory to Lender.

     3.   Condemnation.  Lender shall have the right to terminate this
Commitment in the event there occurs, between the date of this Commitment and
the date of the Loan Closing, any loss or damage to the Real Property due to any
taking of all or any portion of the Real Property 


                                         -2-
<PAGE>

by exercise of the power of condemnation or eminent domain, which precludes or
substantially delays completion of the Project.

     4.   Maximum Rate of Interest on Loan.  Notwithstanding anything to the
contrary contained herein or in any other document executed in connection with
the Loan, the effective rate of interest on the Loan shall not exceed the
maximum effective rate of interest permitted by applicable law or regulation. 
Borrower hereby agrees to give Lender prior written notice in the event any
interest payment made to Lender with respect to this Loan will cause the total
interest payments collected in any one year to be usurious under applicable law,
and Lender hereby agrees not to collect knowingly any interest from Borrower in
the form of fees or otherwise which will render this Loan usurious.  In the
event that such interest would be usurious in Lender's opinion, Lender reserves
the right to reduce the interest payable by Borrower or, if the Loan Closing has
not yet occurred and at its option, to terminate this Commitment.  This
provision shall survive the Loan Closing and the repayment of the Loan.

     5.   No Other Liens on Real Property.  Borrower hereby agrees that during
the term of the Loan and any extension thereof, there shall be no other
financing secured by the Real Property and no lien or encumbrance other than
those contemplated by this Commitment shall be created or permitted to exist
against the Real Property without the written consent of Lender.  In the event
such consent is given, any and all such financing and liens shall be absolutely
and unconditionally subordinated to the lien of the Mortgage contemplated by
this Commitment.

     6.   No Transfer of Real Property.  Borrower hereby agrees that during the
term of the Loan and any extension thereof, there shall be no transfer of legal
or equitable ownership of the Real Property.

     7.   No Waiver of Rights.  Neither the failure of Lender nor the delay of
Lender to exercise any right, power or privilege under this Commitment shall
operate as a waiver thereof, nor shall any single or partial exercise of any
right, power or privilege preclude any other or further exercise of any other
right, power or privilege.

     8.   Assignment.

          (a)  Neither this Commitment nor the Loan proceeds shall be assignable
by Borrower without the prior written consent of Lender, and any attempt at such
assignment without such consent shall be void.

          (b)  This Commitment, the Loan and any and all documents pertaining
thereto may be placed, assigned, serviced or participated (either in whole or in
part) by Lender, its successors and assigns.

     9.   Modification; Entire Commitment; No Reliance by Third Parties.  No
change or modification of this Commitment shall be valid unless the same is in
writing and signed by the parties hereto.  This Commitment contains the entire
agreement between the parties hereto and there are no promises, agreements,
conditions, undertakings, warranties and representations, either written or
oral, expressed or implied between the parties hereto other than as herein set 

                                         -3-
<PAGE>

forth.  It is expressly understood and agreed that this Commitment represents an
integration of any and all prior and contemporaneous promises, agreements,
conditions, undertakings, warranties and representation between the parties
hereto.  This Commitment is directed solely and exclusively to Borrower and
shall not inure to the benefit of or be relied upon by any third party.

     10.  Commitment to Survive Closing.  This Commitment shall survive the Loan
Closing and each and every one of the obligations and undertakings of Borrower
named herein shall be continuing obligations and undertakings and shall not
cease and determine until the entire Loan, together with all interest and fees
due hereon and any other amounts which may accrue pursuant hereto or to the
Loan, shall have been paid in full, and until all obligations and undertakings
of Borrower shall have been fully completed and discharged.  To the extent the
Loan Documents conflict with this Commitment, the Loan Documents shall prevail.


          *         *         *         *


                                         -4-


<PAGE>

                            AGREEMENT OF PURCHASE AND SALE


                                       between


                  Brandywine Operating Partnership, L.P., Purchaser,


                                         and


                         RREEF MidAmerica/East Fund-IV, Seller


                                   741 First Avenue
       King of Prussia, Upper Merion Township, Montgomery County, Pennsylvania 


<PAGE>


                                  Table of Contents


1.   Purchase Price.. . . . . . . . . . . . . . . . . . . . . . . . . .  1

2.   Deposit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1

3.   Review of the Property.. . . . . . . . . . . . . . . . . . . . . .  2

4.   Title and Survey.. . . . . . . . . . . . . . . . . . . . . . . . .  3

5.   Representations and Warranties.. . . . . . . . . . . . . . . . . .  4
          5.1  Representations and Warranties of Seller.. . . . . . . .  4
          5.2  Representations and Warranties of Purchaser. . . . . . .  7
          5.3  Limitations.   . . . . . . . . . . . . . . . . . . . . .  7
          5.4  Condition of Property. . . . . . . . . . . . . . . . . .  8

6.   Closing Conditions.. . . . . . . . . . . . . . . . . . . . . . . .  8
          6.1  Title Insurance. . . . . . . . . . . . . . . . . . . . .  8
          6.2  Estoppel Letters . . . . . . . . . . . . . . . . . . . .  8
          6.3  Representations and Warranties . . . . . . . . . . . . .  9
          6.4  Seller Performance . . . . . . . . . . . . . . . . . . .  9

7.   Other Agreements.. . . . . . . . . . . . . . . . . . . . . . . . .  9

8.   Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
          8.1  Closing of Sale. . . . . . . . . . . . . . . . . . . . . 10
          8.2  Prorations; Adjustments. . . . . . . . . . . . . . . . . 10
          8.3  Proration of Service Charges.. . . . . . . . . . . . . . 11
          8.4  Closing Costs. . . . . . . . . . . . . . . . . . . . . . 12
          8.5  Possession.. . . . . . . . . . . . . . . . . . . . . . . 12
          8.6  Seller's Closing Documents.. . . . . . . . . . . . . . . 12
          8.7  Purchaser's Closing Documents. . . . . . . . . . . . . . 13
          8.8  Joint Deliveries.. . . . . . . . . . . . . . . . . . . . 14

9.   Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
          9.1  Modifications. . . . . . . . . . . . . . . . . . . . . . 14
          9.2  Casualty and Condemnation. . . . . . . . . . . . . . . . 14
          9.3  Time of Essence. . . . . . . . . . . . . . . . . . . . . 14
          9.4  Notices. . . . . . . . . . . . . . . . . . . . . . . . . 14
          9.5  Parties Bound. . . . . . . . . . . . . . . . . . . . . . 16
          9.6  Governing Law. . . . . . . . . . . . . . . . . . . . . . 16

                                     i

<PAGE>


          9.7  Continuation Until Closing; Leasing. . . . . . . . . . . 16
          9.8  Brokers. . . . . . . . . . . . . . . . . . . . . . . . . 16
          9.9  Attorneys' Fees. . . . . . . . . . . . . . . . . . . . . 17
          9.10 Remedies for Non-Performance.. . . . . . . . . . . . . . 17
          9.11 Brokers Commission.. . . . . . . . . . . . . . . . . . . 17
          9.12 Survival of Covenants. . . . . . . . . . . . . . . . . . 17
          9.13 Seller's Investment Committee Approval.. . . . . . . . . 17
          9.14 ERISA. . . . . . . . . . . . . . . . . . . . . . . . . . 17
          9.15 Entry and Indemnity. . . . . . . . . . . . . . . . . . . 18
          9.16 Release. . . . . . . . . . . . . . . . . . . . . . . . . 18
          9.17 Confidential Information.  . . . . . . . . . . . . . . . 19
          9.18 Calculation of Time Periods. . . . . . . . . . . . . . . 19
          9.19 Entire Agreement.. . . . . . . . . . . . . . . . . . . . 19
          9.20 Severability.. . . . . . . . . . . . . . . . . . . . . . 20
          9.21 Facsimile Signatures.. . . . . . . . . . . . . . . . . . 20
          9.22 Further Assurances.. . . . . . . . . . . . . . . . . . . 20
          9.23 Offer. . . . . . . . . . . . . . . . . . . . . . . . . . 20
          9.24 Seller Exculpation Clause. . . . . . . . . . . . . . . . 20
          9.25 Purchaser Exculpation Clause.. . . . . . . . . . . . . . 21
          9.26 SEC Reporting (8-K) Requirements.. . . . . . . . . . . . 21

List of Schedules and Exhibits. . . . . . . . . . . . . . . . . . . . . 23



                                       ii

<PAGE>

                            AGREEMENT OF PURCHASE AND SALE


     BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited partnership 
("Purchaser") agrees to purchase, and RREEF MIDAMERICA/EAST FUND-IV, a 
California group trust ("Seller") agrees to sell, that certain improved real 
property, hereinafter referred to as the "Property", situated in the City of 
King of Prussia, Upper Merion Township, Montgomery County, Commonwealth of 
Pennsylvania, legally described on Exhibit A attached hereto and made a part 
hereof, consisting of a single parcel of real estate improved with a building 
commonly known as 741 First Avenue, King of Prussia, Pennsylvania, together 
with all rights, privileges, easements and appurtenances thereto,  including 
any and all mineral rights, development rights, air rights, and the like; all 
personal property owned by the Seller and located on or used in conjunction 
with the Property (specifically excluding furniture, fixtures and equipment 
owned by RREEF Management Company and located in the RREEF Management Company 
office); any and all intangible personal property owned by Seller and used in 
the operation of the Property, including the right to use the name of the 
property (but not the name "RREEF"), to the extent assignable, but excluding 
computer software and related licenses; contract rights, "Leases" of all or 
any part of the Property, all licenses, permits and other written 
authorizations necessary for the use, operation and ownership of the 
Property, records, security deposits and prepaid rent, if any, and the 
benefit of any guaranties of the Leases.

     1.   Purchase Price.  The purchase price for the Property ("Purchase 
Price") is Six Million Three Hundred Forty Thousand Dollars ($6,340,000.00), 
payable by wire transfer of immediately available funds at Closing as defined 
in Paragraph 8.1.

     2.   Deposit.  

          2.1  Purchaser has previously deposited, pursuant to this Agreement 
and pursuant to the Other Agreements (defined in Paragraph 7 below), the 
amount of Five Hundred Fifty Thousand Dollars ($550,000.00) (the "Deposit") 
with Commonwealth Land Title Insurance Company ("Escrow Holder") as earnest 
money to secure Purchaser's performance hereunder and under the Other 
Agreements.  The Deposit may be invested at the direction of Purchaser with 
the approval of Seller.  All investment income earned from the investment of 
the Deposit, less investment fees, if any, will be added to and become a part 
of the Deposit and will be applied toward the Purchase Price under the KOP 
Agreement (defined in Paragraph 7) if Closing is completed in accordance with 
this Agreement; otherwise all interest will be paid to the party entitled to 
the Deposit.  The escrow instructions to Escrow Holder will be in the form of 
Schedule 2.1 attached hereto (the "Escrow Instructions").   If Purchaser does 
not elect to terminate this Agreement pursuant to Section 3 below, prior to 
the end of the Review Period (defined in Section 3.4), on or before one 
business day after last day of the Review Period Purchaser shall deposit an 
additional $500,000 with Escrow Holder, which shall be added to and become a 
part of the Deposit for all purposes hereunder.



<PAGE>

          2.2  Of the total Deposit, the sum of $150,000 is agreed to be 
non-refundable, and shall be refunded to Purchaser only (i) if Purchaser 
terminates this Agreement under Section 3.4, under the circumstances set 
forth in Section 3.4.1, or (ii) if the Agreement is terminated or if the 
Closing fails to occur by reason of Seller's default.  Under all other 
circumstances, wherever under this Agreement and the Other Agreements the 
Deposit is to be returned to Purchaser, $150,000 out of the Deposit shall be 
paid to Seller, to be retained by Seller as fully earned.

     3.   Review of the Property. 

          3.1  From and after the "Effective Date" (as defined in Paragraph 
9.23), Seller agrees to provide Purchaser and its agents or consultants with 
access to the Property to inspect each and every part thereof to determine 
its present condition and to conduct such physical and environmental studies 
(including a mechanical and roof study and Phase I environmental assessment) 
as it deems appropriate.  

          3.2  Within three (3) business days after the Effective Date Seller 
will make available to Purchaser for inspection and copying, all to the 
extent in the possession of Seller or its managing agent, a copy of each 
existing Lease and equipment lease, service contract and maintenance or other 
contract pertaining to the operations of the Property that will survive 
Closing, a copy of each  real estate tax bills for 1994-1996, both inclusive, 
and unaudited financial statements for the Property for the years 1994-1996, 
both inclusive.

          3.3  Within three (3) business days after the Effective Date Seller 
will make available to Purchaser for inspection and copying at the office of 
Seller's managing agent, all to the extent in the possession of Seller or its 
managing agent:

               3.3.1     a copy of each environmental reports relating to the 
Property prepared by third party consultants since January 1, 1995.

               3.3.2     a copy of each current franchises, business or other 
licenses, bonds, permits, certificates, authorizations and other evidences of 
consent, approval, authorization or permission relating to or affecting the 
Project of or from any person, including any governmental authority, held by 
Seller, including any pending applications.

               3.3.3     a copy of each material third party warranties and 
guaranties, if  any, which are in effect with respect to the Property.

          3.4  Purchaser has until 5:00 p.m. CST on February 2, 1998 (the 
"Review Period"), to determine in its sole discretion whether all matters 
relating to the Property (except title and survey, which are governed by 
Paragraph 4), are acceptable, and to obtain the approval of the transaction 
contemplated herein by Seller's Board of Directors.  If Purchaser concludes 
that any matter relating to the Property is not acceptable or that its Board 
has disapproved the 

                                      2
<PAGE>

transaction, Purchaser will so notify Seller (the "Termination Notice") prior 
to the expiration of the Review Period (which notice shall contain a copy of 
Purchaser's roof/structural report and other reports or studies, other than 
environmental reports, obtained in connection with Purchaser's due 
diligence).  Upon timely delivery of the Termination Notice, this Agreement 
will terminate without liability on the part of Seller or Purchaser, other 
than Purchaser's indemnity contained in Paragraph 9.15 hereof and the 
obligation to deliver to Seller a copy of any environmental report obtained 
by Purchaser if requested by Seller within ten (10) days after receipt of the 
Termination Notice.  In the event that Purchaser does not timely so notify 
Seller, Purchaser will be deemed to have concluded that all matters relating 
to the Property are acceptable and to have elected to proceed with the 
transaction upon the terms and conditions contained in this Agreement 
(including the obligation to increase the amount of the Deposit by an 
additional $500,000) without regard to this Paragraph 3.4. 

               3.4.1     If this Agreement is terminated pursuant to 
Paragraph 3.4, the Deposit, less $150,000, will be returned to Purchaser as 
provided in the Escrow Instructions.  This $150,000 shall be paid to Seller, 
unless Purchaser's termination resulted from (i) Seller's default, (ii) a 
material deviation from the economics of the Property as presented in 
Seller's offering memorandum (it being understood and agreed that Seller 
makes no warranty or representation as to said offering memorandum), or (iii) 
any material structural or environmental defect in the Property not known or 
disclosed to Purchaser before December 22, 1997.

          3.5  Purchaser agrees that any information obtained by Purchaser or 
its authorized agents in the conduct of its due diligence will be treated as 
confidential pursuant to Paragraph 9.17.

     4.   Title and Survey.  Purchaser has ordered, at its expense (and upon 
receipt, Purchaser shall promptly deliver copies to Seller): (i) a commitment 
for a 1992 form ALTA Owner's title insurance policy with respect to the 
Property from Commonwealth Land Title Insurance Company (the "Title Insurer") 
in the amount of the Purchase Price, and (ii) copies of all documents 
relating to title exceptions referred to therein.  Seller has already 
ordered, and Purchaser has received, at Purchaser's sole expense, a plat of 
survey of the Property made in accordance with Minimum Standard Detail 
Requirements for ALTA/ACSM Land Title Surveys (1992) pursuant to the accuracy 
standards of an Urban Survey.  On or before January 30, 1998, Purchaser 
agrees to notify Seller of any objection Purchaser may have to any exceptions 
reported in the commitment or any matter shown on the plat of survey (the 
"Unacceptable Exceptions").  Seller will be responsible for satisfaction of 
the Title Insurer's Schedule B-1 seller requirements.  All other exceptions 
and survey matters will be deemed acceptable to Purchaser.  If Purchaser 
fails to give such notice to Seller, the survey and all of the exceptions in 
the title commitment will be deemed acceptable to Purchaser.  Seller will 
have ten (10) days after receipt of Purchaser's notice within which to notify 
Purchaser whether Seller elects to either (a)  eliminate or induce the Title 
Insurer to insure over (subject to Purchaser's consent, not to be 
unreasonably withheld) the Unacceptable Exceptions or (b) terminate this 
Agreement.  If Seller agrees to eliminate or induce to the Title Insurer to 
insure over (with Purchaser's consent) the 


                                      3

<PAGE>



Unacceptable Exceptions, Seller will be obligated to do so at its cost on or 
prior to Closing.   If Seller elects to terminate this Agreement, neither 
party will have any further rights or obligations hereunder, except as 
provided in Paragraph 9.15.  If Seller fails to give any timely notice, 
Seller will be deemed to have elected to terminate this Agreement.  If  any 
other recorded exception to title is discovered after the commitment is 
delivered to Purchaser, and Purchaser does not elect to waive such exception 
upon the first to occur of (a) the Closing or (b) seven (7) days after being 
notified of such exception and to proceed with the consummation of the 
Closing, Seller will have fifteen (15) days after the expiration of said 
seven (7) day period (and Closing will be delayed if necessary, so that it 
occurs not earlier than twenty-two (22) days after Purchaser is notified of 
such exception) after notifying Purchaser of such discovery in which to use 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over (subject to Purchaser's approval, not to be unreasonably 
withheld) such exception, and if such exception is not eliminated or insured 
over as aforesaid within said 15-day period, Purchaser may terminate this 
Agreement, in which event the Deposit will be returned to Purchaser and 
neither party will have any further rights or obligations hereunder except as 
provided in Paragraph 9.15, or close the sale subject to such exception.  
Seller agrees that it will pay off at Closing (and not induce the Title 
Insurer to insure over) title exceptions representing monetary liens of a 
definite or ascertainable amount voluntarily granted by Seller.  In using 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over Unacceptable Exceptions, Seller will not be required to 
litigate or to expend more than $10,000 in the aggregate.  Ad valorem real 
estate taxes not yet due and payable and all title and survey matters which 
are not Unacceptable Exceptions are hereinafter referred to as Acceptable 
Exceptions. 

     5.   Representations and Warranties.
 
          5.1  Representations and Warranties of Seller.  As used in this 
Paragraph 5.1 and elsewhere in this Agreement, the phrase "to the knowledge 
of Seller" or phrases of similar import mean and are limited to the actual 
current knowledge, without duty to investigate or inquire, of Seller's 
portfolio manager (Pamela Boneham) and Seller's local manager  having ongoing 
management responsibility with respect to the Property (Barbara Gillentine), 
and not to any constructive knowledge of any of the foregoing individuals or 
of Seller or any investment advisor to Seller, any entity that is a partner 
in such investment advisor, or any affiliates of any thereof, or to any 
officer, agent, representative, or employee of Seller or such investment 
advisor, any such constituent partner, or any such affiliate.  Seller hereby 
warrants and represents to Purchaser (with such representations and 
warranties to be re-made as of Closing pursuant to Paragraph 8.6.10) as 
follows:

               5.1.1     Pending Proceedings.  With the exception of the 
items set forth in  Schedule 5.1 (the "Disclosure Schedule") to the knowledge 
of Seller, Seller has received no written notice of special assessments, 
condemnation, environmental, zoning or other land use regulation proceedings, 
either pending or planned to be instituted, with respect to the Property or 
any part thereof.   


                                        4


<PAGE>

               5.1.2     Status of Seller and Closing Documents.  Subject to 
Paragraph 9.13, this Agreement has been, and all the closing documents to be 
delivered by Seller to Purchaser at Closing are or will be, duly authorized, 
executed, and delivered by Seller, will be sufficient to convey insurable 
title, are legal, valid, and binding obligations of Seller, are enforceable 
in accordance with their respective terms, and do not violate any provisions 
of any agreement to which Seller or the Property is subject or bound.  Seller 
is duly organized and validly existing and, if required, duly qualified to 
transact business in the State in which the Property is located.  

               5.1.3     Non-Foreign Status.  Seller is not a foreign person 
within the meaning of Section 1445(f)(3) of the Internal Revenue Code of 
1986, as amended.

               5.1.4     Compliance with Laws.  With the exception of the 
items set forth in the Disclosure Schedule, Seller has received no 
governmental notice, not heretofore corrected, alleging that the Property or 
its current uses are in violation of any zoning, building, health, traffic, 
environmental, flood control or all other applicable rules, regulations, 
codes, ordinances, or statutes of any local, state and federal authorities or 
any other governmental authority (collectively, the "Laws") asserting 
jurisdiction over the Property. 

               5.1.5     Service Contracts.  With the exception of the items 
set forth in the Disclosure Schedule, to Seller's knowledge, there are no 
agreements or contracts affecting the Property (including, without 
limitation, any management, leasing, services or maintenance agreements) 
which are not terminable at will by Seller without further liability, upon 
not more than 30 days' prior written notice.  The contracts and agreements to 
be assigned to Purchaser pursuant to Paragraph 8.6.5 are listed on Schedule 
5.1.5 attached hereto.  Seller agrees to terminate the existing management 
agreement covering the Property on or before Closing.

               5.1.6     No Default.  The execution and delivery of this 
Agreement, and consummation of the transaction described in this Agreement, 
does not and will not constitute a default under any contract, lease, or 
agreement to which Seller is a party or by which Seller is bound.

               5.1.7     No Suits.  Except as set forth in the Disclosure 
Schedule and except for personal injury or property damage actions for which 
there is adequate insurance coverage and where the insurance carrier has 
accepted the tender of the defense without reservation, to Seller's 
knowledge, there is no action, suit or proceeding  pending or threatened 
against or affecting the Property or any portion thereof, or relating to or 
arising out of the ownership, management or operation of the Property, in any 
court or before or by any federal, state, or municipal department, 
commission, board, bureau or agency or other governmental instrumentality.

               5.1.8     Environmental Condition.  Each of the following 
representations contained in this Paragraph 5.1.8 is wholly qualified and 
limited by (a) any matters disclosed in 


                                     5

<PAGE>


any materials made available or delivered to Purchaser by Seller pursuant to 
Paragraph 3 above or otherwise, (b) any matters disclosed in any 
environmental reports or studies obtained by Purchaser, and (c) any other 
matters of which Purchaser has actual knowledge. Subject to the foregoing, 
Seller represents: 

                    5.1.8.1   With the exception of items listed in the 
Disclosure Schedule, and except (i) in amounts customarily found in office 
uses and in the other uses for which the Property is suited and used and (ii) 
in compliance with applicable law, to Seller's knowledge, Seller has not 
released, generated or handled Hazardous Materials on the Property, and 
Seller has no knowledge of any release, generation or handling of Hazardous 
Materials on the Property by any tenants or the incorporation of Hazardous 
Materials by the tenants in any improvements on the Property during the time 
Seller owned the Property.  For the purposes hereof, "Hazardous Material"  
means any substance, chemical, waste or other material which is listed, 
defined or otherwise identified as "hazardous" or "toxic" under any federal, 
state, local or administrative agency ordinance or law, including, without 
limitation, the Comprehensive Environmental Response, Compensation and 
Liability Act, 42 U.S.C. Sections 9601 et seq. and the Resource Conservation 
and Recovery Act, 42 U.S.C. Sections 6901 et seq., or any regulation, order, 
rule or requirement adopted hereunder, as well as any formaldehyde, urea, 
polychlorinated biphenyls, petroleum, petroleum product or by-product, crude 
oil, natural gas, natural gas liquids, liquefied natural gas, or synthetic 
gas usable for fuel or mixture thereof, radon, asbestos, and "source," 
"special nuclear" and "by-product" material as defined in the Atomic Energy 
Act of 1985, 42 U.S.C. Sections 3011 et seq. 

                    5.1.8.2   With the exception of items listed in the 
Disclosure Schedule, to Seller's knowledge, Seller has not received any 
summons, citation, directive, letter or other communication, written or oral, 
from the United States Environmental Protection Agency or the State 
environmental protection agency having jurisdiction over the Property.

               5.1.9     Options.  Seller has granted no options or rights of 
first refusal to acquire any interest in the Property not set forth in the 
Leases delivered to Purchaser or in documents of record disclosed in the 
title commitment.

               5.1.10    Rent Roll.  To Seller's knowledge, the information 
set forth on the rent roll attached hereto as Schedule 5.1.10  is true and 
accurate in all material respects.

               5.1.11    Tenant Rights.  There are no termination, extension, 
cancellation, or expansion rights under any occupancy arrangements with 
respect to the Property except as contained in the Leases. 

               5.1.12    Leasing Commissions.  All leasing commissions, free 
rent and tenant improvement allowances due and payable as of the date hereof 
by Seller have been paid or will have been paid on or before Closing.  To 
Seller's knowledge, the only current leases as to 


                                        6

<PAGE>


which commissions, free rent and tenant improvement allowances may become due 
in the future are listed on Schedule 5.1.12, which future obligations shall 
be expressly assumed by Purchaser.

               5.1.13    There are no employees of the Property or Seller who 
will become employees of Purchaser or for which Purchaser shall be 
responsible in any way.

          5.2  Representations and Warranties of Purchaser.  Purchaser hereby 
represents and warrants to Seller that this Agreement has been, and all the 
documents to be delivered by Purchaser to Seller will be, duly authorized, 
executed, and are or will be legal, valid, and binding obligations of 
Purchaser, are or will be enforceable in accordance with their respective 
terms, and do not and will not at Closing violate any provisions of any 
agreement to which Purchaser is subject.

          5.3  Limitations.  Each of the representations and warranties of 
Seller contained in Paragraph 5.1: (i) is made as of the date of this 
Agreement; (ii) will be deemed to be remade by Seller, and to be true in all 
material respects, as of Closing, subject to other matters expressly 
permitted in this Agreement or otherwise specifically approved in writing by 
Purchaser; and (iii) will survive for a period of one (1) year after the 
Closing Date, as defined in Paragraph 8.1.  Any claim that Purchaser may have 
at any time against Seller for a breach of any such representation or 
warranty, whether known or unknown, which is not asserted by notice from 
Purchaser to Seller within such six (6) month period will not be valid or 
effective, and Seller will have no liability with respect thereto.  Nor will 
Seller have any liability to Purchaser for a breach of any representation or 
warranty unless the valid claims for all such breaches collectively aggregate 
more than One Hundred Thousand Dollars ($100,000.00), in which event the full 
amount of such valid claims shall be actionable, subject to the limitation in 
Section 9.10. The continued accuracy in all material respects of the 
aforesaid representations and warranties is a condition precedent to 
Purchaser's obligation to close.  If any of said representations and 
warranties is not correct in all material respects at the time the same is 
made or as of Closing, and Seller had no knowledge of such inaccuracy when 
the representation or warranty was made, or when remade at Closing, or if 
such warranty or representation becomes inaccurate on or prior to Closing 
other than by reason of Seller's default hereunder, Purchaser may, upon being 
notified of such occurrence on or prior to Closing either (a) terminate this 
Agreement without liability on the part of Seller or Purchaser, other than 
Purchaser's indemnity contained in Paragraph 9.15 and the Deposit will be 
returned to Purchaser, or (b) waive such matter and proceed to Closing, by 
notice to Seller given within ten (10) days after Purchaser is notified of 
such occurrence, but in no event later than Closing.  If Purchaser fails to 
give any notice within the required time period, Purchaser will be deemed to 
have elected to waive such matter and to proceed to Closing.  If any of said 
representations and warranties are not correct in all material respects at 
the time the same is made or as of Closing, and Seller had knowledge of such 
inaccuracy when the representation or warranty was made, or, by its default 
hereunder caused the representation or warranty to be inaccurate when remade 
at Closing, Purchaser may either (x) terminate this Agreement subject to its 
obligations under Paragraph 9.15, receive a return of the Deposit and recover 
from Seller all of Purchaser's actual, reasonable out-of-pocket costs 
incurred in connection with its review of 


                                    7


<PAGE>


the Property or (y) waive the breach and its rights under clause (x) and 
proceed to Closing, by notice to Seller given within ten (10) days after 
Purchaser is notified of such occurrence, but in no event later than Closing. 
 If Purchaser fails to give any notice within the required time period, 
Purchaser will be deemed to have elected to waive such matter and to proceed 
to Closing.

          5.4  Condition of Property.  Except as expressly set forth in this 
Agreement, Seller has not made and does not hereby make any representations, 
warranties or other statements as to the condition of the Property and 
Purchaser acknowledges that at Closing it is purchasing the Property on an 
"AS IS, WHERE IS" basis and without relying on any representations and 
warranties of any kind whatsoever, express or implied, from Seller, its 
agents or brokers as to any matters concerning the Property.  Except as 
expressly set forth in this Agreement, no representations or warranties have 
been made or are made and no responsibility has been or is assumed by Seller 
or by any partner, officer, person, firm, agent or representative acting or 
purporting to act on behalf of Seller as to the condition or repair of the 
Property or the value, expense of operation, or income potential thereof or 
as to any other fact or condition which has or might affect the Property or 
the condition, repair, value, expense of operation or income potential of the 
Property or any portion thereof.  The parties agree that all understandings 
and agreements heretofore made between them or their respective agents or 
representatives are merged in this Agreement and the Schedules and Exhibits 
hereto annexed, which alone fully and completely express their agreement, and 
that this Agreement has been entered into after full investigation, or with 
the parties satisfied with the opportunity afforded for investigation, 
neither party relying upon any statement or representation by the other 
unless such statement or representation is specifically embodied in this 
Agreement or the Exhibits annexed hereto.  Purchaser acknowledges that Seller 
has requested Purchaser to inspect fully the Property and investigate all 
matters relevant thereto and, with respect to the condition of the Property, 
to rely solely upon the results of Purchaser's own inspections or other 
information obtained or otherwise available to Purchaser, rather than any 
information that may have been provided by Seller to Purchaser.  

     6.   Closing Conditions.  Purchaser's obligation to proceed to Closing 
is conditioned upon Seller's performance of the following obligations and 
satisfaction of the following conditions, in addition to all of its other 
obligations and conditions contained in this Agreement, provided that 
Purchaser may in its sole discretion elect to waive failure by Seller to 
perform any particular obligation.

          6.1  Title Insurance.  The Title Insurer is prepared to issue a 
policy of title insurance insuring Purchaser's interest in the Property being 
conveyed, subject only to Acceptable Exceptions. 
     
          6.2  Estoppel Letters.  Seller has delivered to Purchaser not later 
than the date of Closing, estoppel letters substantially in the form of 
Schedule 6.2 ("Required Estoppel Form") or in form otherwise reasonably 
acceptable to Purchaser, prepared by Seller and


                                    8

<PAGE>


addressed to Purchaser, from tenants occupying in the aggregate at least 75% 
of the Property, measured by square footage.  All estoppel letters must be 
dated not more than forty-five (45) days prior to the date of Closing.  An 
estoppel letter form, even though not in the Required Estoppel Form, will be 
deemed reasonably acceptable to Purchaser if said letter contains the 
following information: confirming rent, security deposit, square footage  and 
termination date; that no rent has been paid more than one month in advance; 
that the lease is in full force and effect and that a true and correct copy 
of the lease with all amendments and modifications is attached; and that all 
work to be performed by Landlord has been performed and that the tenant has 
no knowledge of any Landlord default.

               6.2.1     If Seller is unable to obtain the requisite estoppel 
letters as described above, Seller may (but is not required to) substitute 
for any unsigned estoppel letter from a tenant other than a Major Tenant an 
estoppel letter in the Required Estoppel Form, which may be completed, 
executed and delivered by Seller and warranted and represented by Seller, 
provided that such substituted estoppel letters will not collectively 
represent in excess of 10% of all of the tenants, measured by square footage. 
 Seller's representations and warranties in the certificates will survive the 
Closing subject to the limitations of Paragraph 5.3.  In the event that, 
following the Closing Date, Seller or Purchaser obtains an estoppel letter 
complying with the requirements of Paragraph 6.2 with respect to any lease 
for which Seller delivered a substituted estoppel letter, Seller will deliver 
such estoppel letter to Purchaser and, upon such delivery, Seller will be 
automatically released from any liability or obligation under the substituted 
estoppel letter previously delivered by Seller with respect to such lease.  
Purchaser may (but shall not be required to) accept a substituted estoppel 
letter as to a Major Tenant as well.

               6.2.2     If Seller is unable to obtain and deliver sufficient 
tenant estoppel certificates as required under Paragraph 6.2, or if the 
letters received under Paragraph 6.2 or substituted estoppels permitted under 
Paragraph 6.2.1 contain information or omissions unacceptable to Purchaser in 
its reasonable discretion, then Seller will not be in default by reason 
thereof, but Purchaser may, by notice given to Seller before the Closing, 
elect (i) to waive said conditions and proceed with the Closing or (ii) to 
terminate this Agreement, and receive a refund of the Deposit.  If Purchaser 
elects to terminate this Agreement, neither party will have any further 
rights or obligations hereunder except as provided in Paragraph 9.15.

          6.3  Representations and Warranties.  All of Seller's 
representations and warranties made pursuant to Paragraph 5.1 remain true and 
correct in all material respects.

          6.4  Seller Performance.  Seller has delivered all of the documents 
and other items required pursuant to Paragraph 8.6 and has performed all 
other covenants, undertakings and obligations required by this Agreement, to 
be performed or complied with by Seller at or prior to Closing.

     7.   Other Agreements.  The obligations of Purchaser and Seller to close 
hereunder shall also be conditioned upon the simultaneous closing of (a) the 
purchase by Purchaser or an 


                                       9

<PAGE>


affiliate of Purchaser, of twelve industrial and office buildings and a 
parcel of vacant land in King of Prussia Business Park, King of Prussia, 
Pennsylvania, pursuant to that certain Agreement of Purchase and Sale of even 
date herewith ("KOP Agreement") between Purchaser, as purchaser, and RREEF 
USA Fund-I  ("KOP Owner"), as seller, and (b) the purchase by Purchaser or an 
affiliate of Purchaser, of the industrial building commonly known as 180 
Wheeler Court, Bucks County, Pennsylvania, pursuant to that certain Agreement 
of Purchase and Sale of even date herewith (the "Wheeler Court Agreement"; 
the KOP Agreement and the Wheeler Court Agreement collectively the "Other 
Agreements") between Purchaser, as purchaser, and RREEF MidAmerica East-V 
Six, Inc. ("Wheeler Court Owner"; the KOP Owner and the Wheeler Court Owner 
are collectively referred to as the "Other Owners"), as seller.  This 
condition may be waived by the parties.  Without limiting the generality of 
the foregoing, if Purchaser terminates this Agreement pursuant to Section 3 
or Section 4, the Other Owners shall have the right to terminate the Other 
Agreements as well; or, if Purchaser terminates one or more of the Other 
Agreements pursuant to Section 3 or Section 4 of the Other Agreements, Seller 
shall have the right to terminate this Agreement as well.  A default by 
Purchaser under one or more of the Other Agreements shall be deemed a 
Purchaser default hereunder, and a default by an Other Owner under one or 
more of the Other Agreements shall be deemed a Seller default hereunder.

     8.   Closing.

          8.1  Closing of Sale.  The purchase and sale contemplated herein 
shall close (herein referred to as the "Closing") at the office of the Title 
Insurer, or as otherwise mutually agreed, on a date selected by Seller, which 
date (the "Closing Date") shall not be earlier than the date which is fifteen 
(15) days after the expiration of the Review Period nor more than thirty (30) 
days after expiration of the Review Period, time being of the essence.  At 
Closing, Seller will deliver to Purchaser a Special Warranty Deed ("Deed") in 
the form of Schedule 8.6.1 and other closing documents required hereunder and 
Purchaser will cause payment of the Purchase Price to be made to Seller by 
wire transfer.  The sale (payment of the Purchase Price and delivery of the 
Deed) may, at Purchaser's option to be exercised by notice to Seller at least 
five (5) days prior to the Closing Date, be closed through escrow with the 
Title Insurer in accordance with the general provisions of the usual form of 
escrow agreement used in similar transactions by such Title Insurer with 
special provisions inserted (i) as may be required to conform with this 
Agreement and (ii) to close on a so-called "New York Style" basis.

          8.2  Prorations; Adjustments.   The parties will prorate taxes, 
rental, and other income, and operating or other expenses of the Property as 
of 12:01 a.m. on the date after Closing (i.e., Seller is entitled to the 
income and responsible for the expenses of the day of Closing).  All income 
will be prorated on the basis of income actually received by Seller, as 
opposed to income which is due or for which Seller has rendered invoices but 
which has not been paid (i.e., Seller will not be entitled to any credit for 
receivables, and there will be no proration as to such receivables).  Any 
taxes or other expenses of the Property for any period prior to Closing which 
are payable by tenants of the Property subsequent to Closing (e.g., real 
estate taxes paid in arrears and not yet billed to tenants), will reduce the 
credit to Purchaser for such items (i.e., no 


                                      10

<PAGE>


credit from Seller for pass-through items for which Purchaser will later 
collect from the tenants).  To the extent that the taxes to be prorated are 
not known with certainty, such proration will be based upon the most recent 
tax bill or county estimate, to be re-prorated upon issuance of final bills. 
Seller also agrees to give Purchaser a credit against the Purchase Price for 
all cash security deposits required to be held pursuant to the Leases (less 
portions thereof applied by Seller to tenant defaults and not subsequently 
restored by the tenant in question) and all interest due thereon and shall 
assign to Purchaser any other tenant deposits held by Seller.  Purchaser will 
pay amounts subsequently received by it from tenants constituting base rent, 
capital reimbursements or other income due from tenants and attributable to 
Seller's period of ownership, but not collected as of the date of Closing, to 
Seller promptly upon receipt; provided that amounts received from tenants by 
Purchaser will be first applied to current charges, and the balance will be 
applied to payments due to Seller.  Notwithstanding the foregoing, Seller 
shall expressly reserve the right to seek to collect, directly from the 
tenants after Closing and with Purchaser's cooperation, any delinquencies and 
other amounts attributable to Seller's period of ownership, but not collected 
as of the date of Closing.  To the extent Seller has received amounts from 
tenants for real estate taxes and 1997 and 1998 operating expenses in excess 
of amounts paid by Seller with respect to such expenses, Seller will credit 
such excess to Purchaser at Closing, and Seller will provide adequate backup 
information in connection with such credit.   On or after the Closing, Seller 
will have no further obligations with respect to any Leases or other 
agreements affecting the Property, including, without limitation, tenant 
improvement work, leasing commissions and free rent.

               8.2.1     Seller and Purchaser hereby agree to use their 
reasonable efforts to calculate prorations (including real estate tax 
prorations) so as to permit settlement thereof on the Closing Date, provided, 
however, that if any of such prorations cannot be calculated accurately on 
the Closing Date, then the same will be calculated as soon as reasonably 
practicable after the Closing Date, but in no event later than the later to 
occur of (i) thirty (30) days after Seller receives its final cost 
certification for the year in which Closing occurs, or (ii) March 31 of the 
year following the year in which Closing occurs, and either party owing the 
other party a sum of money based on such subsequent proration(s) shall 
promptly pay said sum to the other party, together with interest thereon at 
the rate of two percent (2%) per annum over the "prime rate" (as announced 
from time to time in the Wall Street Journal) from the Closing Date to the 
date of payment if payment is not made within thirty (30) days after delivery 
of a bill therefor together with reasonable back-up documentation.  This 
obligation of the parties will survive Closing.

          8.3  Proration of Service Charges.  To the extent Seller, as 
opposed to tenants, is responsible for payment of utility charges, Seller 
will attempt to have utility meters read as of the Closing Date.  To the 
extent that this is not possible and to the extent that any other obligation 
for continuing services is incurred, and statements are rendered for such 
services covering periods both before and after the Closing Date, the amount 
will be adjusted between the parties as of the Closing Date on a per-diem 
basis.  Seller will forward any such statements which it receives to 
Purchaser and Purchaser will pay the same. Seller will remit to Purchaser its 
proportionate share immediately upon demand.


                                     11

<PAGE>


          8.4  Closing Costs.  Purchaser agrees to pay (i) the Title 
Insurer's escrow and/or closing fees (including any payment to the closing 
officer of the Title Insurer as may be the local custom at the Closing), (ii) 
the cost of the title commitment and basic policy and endorsements, if any, 
required to meet Seller's obligations hereunder and the cost of any 
endorsements to the title policy required by Purchaser, including extended 
coverage, (iii) all recording fees and taxes with respect to the Deed, (iv) 
all costs of Purchaser's physical inspections of the Property (environmental, 
engineering) and other due diligence activities; (v) all costs of survey, 
including fees and charges of Gannett Fleming Associates (originally engaged 
by Seller); (vi) cancellation charges, if applicable, to Coventry Abstract 
(originally engaged by Seller); and (vii) one-half (1/2) of applicable 
transfer taxes.  Seller agrees to pay (i) all recording fees with respect to 
clearing Seller's title, and (ii) one-half (1/2) of applicable transfer 
taxes.  Except as otherwise provided in Paragraph 9.9, each party is 
responsible for its own attorneys' and other professional fees.  All other 
closing costs shall be allocated in accordance with the prevailing local 
custom.

          8.5  Possession.  Subject to the rights of tenants pursuant to 
Leases delivered to Purchaser, Seller will deliver possession of the Property 
and of any conveyed personal property to the Purchaser on the date of Closing 
and Seller will thereupon deliver to Purchaser the originals of all Leases, 
all correspondence with tenants, tenant/lease files, operating statements, 
plans and specifications, supplies and advertising materials, booklets, keys, 
and other items used in connection with operation of the Property.

          8.6  Seller's Closing Documents.  As part of the Closing, Seller 
will deliver to Purchaser:  

               8.6.1     the Deed, in the form of Schedule 8.6.1

               8.6.2     an affidavit in customary form that Seller is not a 
foreign person within the meaning of Section 1445(e) of the Internal Revenue 
Code of 1986, in the form of Schedule 8.6.2; 

               8.6.3     such affidavits as are customarily required by Title 
Insurer in connection with issuance of the owner's basic title insurance 
policy, including a mechanics' lien and judgment affidavit; 

               8.6.4     an assignment of the Leases in the form of Schedule 
8.6.4 ("Lease Assignment"); 

               8.6.5     an assignment of contracts and warranties in the 
form of Schedule 8.6.5 ("Contracts Assignment"), assigning to Purchaser all 
contracts listed on Schedule 5.1.5, other than those designated by Purchaser 
for termination by notice to Seller not less than thirty (30) days prior to 
Closing;


                                    12


<PAGE>

               8.6.6     an assignment of intangibles in the form of Schedule 
8.6.6 ("Intangibles Assignment");

               8.6.7     letters, in form to be supplied by Purchaser, to the 
tenants at the Property,  instructing the tenants to pay rent to Purchaser 
and to recognize Purchaser as landlord under their Leases; 

               8.6.8     a bill of sale conveying all personal property of 
Seller, if any, located at the Property and used in connection with the 
maintenance or operation thereof (specifically excluding furniture, fixtures 
and equipment owned by RREEF Management Company and located in the RREEF 
Management Company office), in the form of Schedule 8.6.8; 

               8.6.9     a rent roll, certified by Seller as being true and 
correct, to Seller's knowledge, as of the Closing Date, in the form 
previously delivered to Purchaser;

               8.6.10    a "bring down certificate" stating that Seller's 
representations and warranties are true and correct as of the Closing Date, 
in the form of Schedule 8.6.10;

               8.6.11    estoppel certificates as required by Paragraph 6.2 
herein; and 

               8.6.12    all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

          8.7  Purchaser's Closing Documents.  As part of the Closing, 
Purchaser will deliver to Seller:  

               8.7.1     good federal funds in an amount equal to the 
Purchase Price, less the Deposit and interest thereon and plus or minus 
prorations as provided herein and plus funds sufficient to pay Purchaser's 
closing costs hereunder; 

               8.7.2     such affidavits as are customarily required by Title 
Insurer in connection with issuance of the owner's title insurance policy; 

               8.7.3     executed counterpart of the Lease Assignment;

               8.7.4     executed counterpart of the Contracts Assignment;

               8.7.5     executed counterpart of the Intangibles Assignment;

               8.7.6     all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.


                                     13

<PAGE>


          8.8  Joint Deliveries.  At the Closing, Seller and Purchaser will 
execute and deliver to each other the following documents in proper form:

               8.8.1     Closing Statement;

               8.8.2     City, county and state transfer tax declarations or 
similar instruments; and 

               8.8.3     All other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

     9.   Miscellaneous.

          9.1  Modifications.  This Agreement can be amended only in writing 
signed by both of the parties.

          9.2  Casualty and Condemnation.  Seller agrees to keep its 
customary replacement cost insurance covering the Property in effect until 
the Closing. If between the Effective Date and the Closing the improvements 
on the Property are destroyed or damaged to the extent that repairs cost in 
excess of $250,000 in the estimate of an architect or contractor selected by 
Seller and reasonably acceptable to Purchaser, or if condemnation proceedings 
are commenced against the Property, Purchaser may (i) terminate this 
Agreement or (ii) elect to accept the Property in its then condition, in 
which event Seller will pay or assign to Purchase at Closing all proceeds of 
insurance (plus the applicable deductible) or condemnation awards payable to 
Seller by reason of such damage or condemnation.  In the event Purchaser 
makes neither election by the earlier of (a) Closing or (b) ten (10) days 
after being advised of such casualty or condemnation, Purchaser will be 
deemed to have elected to accept the Property in its then condition.  In the 
event of any other damage to the Property, Seller may either repair the 
damage or give Purchaser a reduction in the Purchase Price equal to the cost 
of repairing such damage, as certified by an architect or contractor selected 
by Seller and reasonably acceptable to Purchaser.  In the event of any damage 
where Purchaser does not have the right to terminate and Seller elects to 
repair such damage, the Closing Date shall be delayed for the number of days 
required to repair the damage, which Seller agrees to do in accordance with 
all Laws and in a good and workmanlike manner.    

          9.3  Time of Essence.  Time (including, without limitation, the 
date specified as the Closing Date) is of the essence of this Agreement.

          9.4  Notices.  All notices required or permitted hereunder must be 
in writing and shall be served on the parties at the following address:

          If to Purchaser:    Brandywine Realty Trust


                                       14

<PAGE>


                              Newtown Square Corporate Campus
                              16 Campus Blvd.
                              Suite 150
                              Newtown Square, PA 19073
                              Attn:     Gerard H. Sweeney, President & CEO
                                        Brad A. Molotsky, General Counsel
                              Facsimile: (610-325-5622)               

          If to Seller:       RREEF MidAmerica/East Fund-IV
                              c/o The RREEF Funds
                              875 N. Michigan Avenue
                              Suite 4100
                              Chicago, IL 60611
                              Attn: Mr. John Turney & Ms. Pamela Boneham
                              Facsimile: (312) 266-9346
          
          with a copy to:     RREEF MidAmerica/East Fund-IV
                              c/o The RREEF Funds
                              650 Park Avenue
                              Suite 210
                              King of Prussia, PA 19406
                              Attn: Ms. Barbara Gillentine
                              Facsimile: (610) 337-2308
          
          and a copy to:      D'Ancona & Pflaum
                              30 North LaSalle Street
                              Suite 2900
                              Chicago, Illinois  60602
                              Attn: Lawrence J. Moss
                              Facsimile: (312) 580-0923

Any such notices may be sent by (a) certified mail, return receipt requested, in
which case notice will be deemed delivered three (3) business days after
deposit, postage prepaid in the U.S. mail or (b) a nationally recognized
overnight courier, in which case notice will be deemed delivered one business
day after deposit with such courier or (c) facsimile transmission, in which case
notice will be deemed delivered upon electronic verification that transmission
to recipient was completed, provided that notices sent by facsimile transmission
on a day other than a business day, or before 9:00 a.m. or after 5:00 p.m.
recipient's time on a business day, shall be deemed given on the first business
day following the date of transmission or (d) personal delivery.  The above
addresses and facsimile numbers may be changed by notice to the other party;
provided that no notice of a change of address or facsimile number will be
effective until actual receipt of such notice.


                                       15

<PAGE>

          9.5  Parties Bound.  Neither party may assign this Agreement 
without the prior written consent of the other, and any such prohibited 
assignment shall be void; provided that Purchaser may assign this Agreement 
without Seller's consent to an Affiliate; provided that the assignee is not a 
party-in-interest as described in Paragraph 9.14.  Subject to the foregoing, 
this Agreement is binding upon and inure to the benefit of the respective 
legal representatives, successors, assigns, heirs, and devisees of the 
parties.  For the purposes of this Paragraph, the term "Affiliate" means (a) 
an entity that directly or indirectly controls, is controlled by or is under 
common control with the Purchaser or (b) an entity at least a majority of 
whose economic interest is owned by Purchaser; and the term "control" means 
the power to direct the management of such entity through voting rights, 
ownership or contractual obligations.

          9.6  Governing Law.  The performance and interpretation of this 
Agreement is controlled by the law of the Commonwealth of Pennsylvania.

          9.7  Continuation Until Closing; Leasing. 

               9.7.1      Between the Effective Date and the Closing, Seller 
agrees to keep and perform all of the obligations to be performed by landlord 
under any Leases and Laws.  Seller agrees to operate the Property in the same 
manner as before the making of this Agreement, the same as though Seller were 
retaining the Property.  Seller agrees not to convey the Property, nor to 
grant any liens or easements with respect thereto.

               9.7.2     Seller shall not permit or consent to any new 
leases, amendments, extensions, renewals (other than pursuant to tenant 
renewal options, if any) or subleases without first submitting them to 
Purchaser for Purchaser's approval on an approval form in the form attached 
hereto as Schedule 9.7.2, which approval shall not be unreasonably withheld.  
Purchaser shall have three (3) business days to notify Seller of its approval 
of such leases, amendments, extensions, renewals or subleases, and in the 
event that Purchaser does not so notify Seller, the leases, amendments, 
extensions, renewals or  subleases, as the case may be, shall be deemed 
approved.  

               9.7.3     With respect to any new lease or lease modification 
entered into by Seller after December 18, 1997 and approved by Purchaser, by 
the terms of which Seller obligates itself to perform or performs or pays or 
contracts for any tenant improvement work or additional landlord work 
required pursuant to such lease, or pays or contracts for any leasing 
commissions or grants any free rent period or other financial concessions, 
then such expenses and/or free rent or other concessions, and all other 
third-party costs incurred (including attorneys' fees) in connection with 
such lease, will be a credit to Seller at Closing to the extent Seller paid 
such amounts prior to Closing; otherwise Purchaser agrees to assume liability 
for the payment and performance of such obligations in accordance with the 
terms thereof.

          9.8  Brokers.  Seller and Purchaser each (i) represents and 
warrants to the other that it has not dealt with any broker or finder in 
connection with the transaction contemplated by 


                                      16

<PAGE>


this Agreement other than the parties, if any, to be paid a commission as 
specified in Paragraph 9.11, and (ii) agrees to defend, indemnify and hold 
the other harmless from and against any losses, damages, costs, or expenses 
(including attorneys' fees) incurred by such other party due to a breach of 
the foregoing warranty by the indemnifying party.

          9.9  Attorneys' Fees.  Notwithstanding any limitation on remedies 
or amounts recoverable set forth elsewhere herein, if any action is brought 
by either party against the other party, the party in whose favor final 
judgment is entered will be entitled to recover court costs incurred and 
reasonable attorneys' fees at trial, upon appeal and on any petition for 
review.

          9.10 Remedies for Non-Performance.  Purchaser's remedies regarding 
breach of warranty or representation by Seller are governed by Paragraph 5.3. 
In the event of any other default by Seller hereunder, Purchaser may, as its 
sole and exclusive remedy, either (i) terminate this Agreement and seek 
damages, subject to performance of Purchaser's indemnities set forth in 
Paragraph 9.15, and receive back the Deposit or (ii) seek specific 
performance.  If said sale is not consummated because of a default under this 
Agreement on the part of Purchaser, the Deposit will be paid to and retained 
by Seller as Seller's sole and exclusive remedy.  Seller and Purchaser 
acknowledge that the Deposit is a reasonable forecast of just compensation 
for the harm that could be caused by Purchaser's default and that the harm 
suffered by Seller is difficult or impossible to accurately ascertain or 
predict.  NOTWITHSTANDING ANY OTHER PROVISION OF THIS AGREEMENT TO THE 
CONTRARY, SELLER'S TOTAL LIABILITY FOR DAMAGES FOR BREACH OF THE COVENANTS, 
AGREEMENTS, WARRANTIES AND REPRESENTATIONS UNDER THIS AGREEMENT AND THE OTHER 
AGREEMENTS, COLLECTIVELY, SHALL NEVER EXCEED TWO MILLION DOLLARS 
($2,000,000.00), AND IN NO EVENT SHALL SELLER BE LIABLE FOR SPECIAL, 
EXEMPLARY, CONSEQUENTIAL OR PUNITIVE DAMAGES.

          9.11 Brokers Commission.  Seller agrees to pay the brokerage 
commission due The Flynn Company pursuant to a separate agreement.

          9.12 Survival of Covenants.  All covenants hereunder which, by 
their terms, are intended to survive Closing will survive Closing hereunder.

          9.13 Seller's Investment Committee Approval. This condition has 
been satisfied.

          9.14 ERISA.  Purchaser represents and warrants to Seller that none 
of Purchaser's assets are "plan assets," (as that term is defined by 29 CFR 
Section 2510.3-101) because all plans that are subject to the provisions of 
the Employee Retirement Income Security Act of 1974, as amended, and which 
have invested in Purchaser hold only "equity interests," (as that term is 
defined by 29 CFR Section 2510.3-101(b)(1)) that are "publicly-offered 
securities," (as that term is defined by 29 CFR Section 2510.3-101(b)(2)).  
Purchaser further represents and warrants to Seller that 


                                      17

<PAGE>


it is not any one of the types of entities listed in 29 CFR Section 
2510.3-101(h), the character of which would identify its assets as "plan 
assets."

          9.15 Entry and Indemnity.  In connection with any entry by 
Purchaser, or its agents, employees or contractors onto the Property, 
Purchaser shall give Seller reasonable advance notice of such entry and shall 
conduct such entry and any inspections in connection therewith so as to 
minimize, to the greatest extent possible, interference with Seller's 
business and the business of Seller's tenants and otherwise in a manner 
reasonably acceptable to Seller. Without limiting the foregoing, prior to any 
entry to perform any on-site testing, Purchaser shall give Seller notice 
thereof, including the identity of the company or persons who will perform 
such testing and the proposed scope of the testing.  Seller shall approve or 
disapprove the scope and methodology of such proposed testing within three 
(3) business days after receipt of such notice, such approval to be within 
the sole and unfettered discretion of Seller; Seller's failure to notify 
Purchaser of its approval or disapproval shall be deemed to be Seller's 
disapproval thereof.  If Purchaser or its agents, employees or contractors 
take any sample from the Property in connection with any such approved 
testing, upon Seller's request, Purchaser shall provide to Seller a portion 
of such sample being tested to allow Seller, if it so chooses, to perform its 
own testing.  Seller or its representative may be present to observe any 
testing or other inspection performed on the Property.  Upon Seller's 
request, Purchaser shall promptly deliver to Seller copies of any reports 
relating to any testing or other inspection of the Property performed by 
Purchaser or its agents, employees or contractors.  Purchaser shall maintain, 
and shall assure that its contractors maintain, public liability and property 
damage insurance in amounts and in form and substance adequate to insure 
against all liability of Purchaser, its agents, employees or contractors, 
arising out of any entry or inspections of the Property pursuant to the 
provisions hereof, and Purchaser shall provide Seller with evidence of such 
insurance coverage upon request by Seller.  Purchaser shall indemnify, defend 
and hold Seller harmless from and against any costs, damages, liabilities, 
losses, expenses, liens or claims (including, without limitation, reasonable 
attorney's fees) arising out of or relating to any entry on the Property by 
Purchaser, its agents, employees or contractors in the course of performing 
the inspections, testings or inquiries provided for in this Agreement, 
including without limitation damage to the Property or release of hazardous 
substances or materials onto the Property, excluding, however, any costs 
incurred by Seller in supervising Purchaser's testing.  The foregoing 
indemnity shall survive beyond the Closing, or if the sale is not 
consummated, beyond the termination of this Agreement. 

          9.16 Release.  Except to the extent of the representations and 
warranties of Seller expressly set forth in this Agreement, and except to the 
extent of a breach by Seller of applicable laws, but otherwise 
notwithstanding any other provision of this Agreement to the contrary, 
Purchaser, on behalf of itself and its successors and assigns, waives its 
right to recover from, and forever releases and discharges, Seller, Seller's 
affiliates, Seller's investment manager, the partners, trustees, 
shareholders, directors, officers, employees and agents of each of them, and 
their respective heirs, successors, personal representatives and assigns 
(collectively, the "Seller Related Parties"), from any and all demands, 
claims, legal or administrative proceedings, losses, liabilities, damages, 
penalties, fines, liens, judgments, costs or expenses whatsoever (including,

         
                                       18

<PAGE>

 
without limitation, attorneys' fees and costs), whether direct or indirect, 
known or unknown, foreseen or unforeseen, which may arise on account of or in 
any way be connected with the physical condition of the Property or any law 
or regulation applicable thereto, including, without limitation, the 
Comprehensive Environmental Response, Compensation and Liability Act of 1980, 
as amended (42 U.S.C. Sections 9601 et seq.), the Resources Conservation and 
Recovery Act of 1976 (42 U.S.C. Section 6901 et seq.), the Clean Water Act 
(33 U.S.C. Section 466 et seq.), the Safe Drinking Water Act (14 U.S.C. 
Sections 1401-1450), the Hazardous Materials Transportation Act (49 U.S.C. 
Section 1801 et seq.), and the Toxic Substance Control Act (15 U.S.C. 
Sections 2601-2629) 

          9.17 Confidential Information.  The parties acknowledge that the 
transaction described herein is of a confidential nature and shall not be 
disclosed except to consultants, investors,  advisors, and affiliates, or as 
required by law.  No party will make any public disclosure of the specific 
terms of this Agreement, except as required by law.  Without limiting the 
generality of the foregoing, any press release or other public disclosure 
regarding this Agreement or the transactions contemplated herein, and the 
wording of same, must be approved in advance by both parties.  In connection 
with the negotiation of this Agreement and the preparation for the 
consummation of the transactions contemplated hereby, each party acknowledges 
that it will have access to confidential information relating to the other 
party.  Each party shall treat such information as confidential, preserve the 
confidentiality thereof, and not duplicate or use such information, except to 
advisors, consultants, investors and affiliates in connection with the 
transactions contemplated hereby.  In the event of the termination of this 
Agreement for any reason whatsoever, Purchaser will return to Seller, at 
Seller's request, all documents, work papers, and other material (including 
all copies thereof) obtained from Seller in connection with the transactions 
contemplated hereby, and each party shall use its best efforts, including 
instructing its employees and others who have had access to such information, 
to keep confidential and not to use any such information.  The provisions of 
this Paragraph 9.17 will survive the Closing or, if the purchase and sale is 
not consummated, any termination of this Agreement.  

          9.18 Calculation of Time Periods.  Unless otherwise specified, in 
computing any period of time described herein, the day of the act or event, 
after which the designated period of time begins to run, is not to be 
included and the last day of the period so computed is to be included, unless 
such last day is a Saturday, Sunday or legal holiday, in which event the 
period shall run until the end of the next day which is neither a Saturday, 
Sunday, or legal holiday (i.e., a day on which federally chartered banks are 
not open for business in Chicago, Illinois).  The last day of any period of 
time described herein shall be deemed to end at 5 p.m. Chicago, Illinois time 
on the last day of such period of time. All days other than Saturdays, 
Sundays and legal holidays in which national banks are closed in Chicago, 
Illinois are business days hereunder.

          9.19 Entire Agreement.  This Agreement and any other document to be 
furnished pursuant to the provisions hereof embody the entire agreement and 
understanding of the parties hereto as to the subject matter contained 
herein. There are no restrictions, promises, 


                                   19

<PAGE>


representations, warranties, covenants, or undertakings other than those 
expressly set forth or referred to in such documents.  This Agreement and 
such documents supersede all prior agreements and understandings among the 
parties with respect to the subject matter hereof

          9.20 Severability.  Any term or provision of this Agreement that is 
invalid or unenforceable in any jurisdiction will, as to such jurisdiction, 
be ineffective to the extent of such invalidity or unenforceability without 
rendering invalid or unenforceable the remaining terms and provisions of this 
Agreement, or affecting the validity or enforceability of any of the terms or 
provisions of this Agreement.

          9.21 Facsimile Signatures.  Executed facsimile copies of this 
Agreement or any amendments hereto shall be binding upon the parties, and 
facsimile signatures appearing hereon or on any amendments hereto shall be 
deemed to be original signatures.

          9.22 Further Assurances.  In addition to the acts and deeds recited 
herein and contemplated to be performed, executed and/or delivered by Seller 
to Purchaser at Closing, Seller agrees to perform, execute and deliver, but 
without any obligation to incur any additional liability or expense, on or 
after the Closing any further deliveries and assurances as may be reasonably 
necessary to consummate the transactions contemplated hereby or to further 
perfect the conveyance, transfer and assignment of the Property to Purchaser.

          9.23 Offer.  Execution and delivery of this Agreement by Purchaser 
constitutes an offer to purchase the Property on the terms contained herein. 
Delivery by Seller of a copy of  the fully executed Agreement by facsimile 
transmission on or before the Expiration Date, followed by a manually signed 
copy thereof delivered the next business day after transmission of such copy, 
shall constitute acceptance by Seller as of the date of the facsimile 
transmission. The date on which Seller delivers a fully executed copy of this 
Agreement to Purchaser, or delivers a copy by facsimile transmission followed 
by a manually signed copy as provided in the preceding sentence is referred 
to herein as the "Effective Date."

          9.24 Seller Exculpation Clause.  The obligations of Seller 
contained herein are intended to be binding only on the property of the trust 
party to this Agreement of Purchase and Sale and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the trustees, investment managers, any general partners thereof, or any 
employees or agents of the trustees or investment managers.  All documents to 
be executed by Seller shall also contain the foregoing exculpation.


                                      20

<PAGE>


          9.25 Purchaser Exculpation Clause.  No recourse shall be had for 
any obligation of Brandywine Operating Partnership, L.P. and Brandywine 
Realty Trust under this Agreement or under any document executed in 
connection herewith or pursuant hereto, or for any claim based thereon or 
otherwise in respect thereof, against any past, present or future trustee, 
shareholder, officer or employee of Brandywine Operating Partnership, L.P. or 
Brandywine Realty Trust, whether by virtue of any statute or rule of law, or 
by the enforcement of any assessment or penalty or otherwise, all such 
liability being expressly waived and released by the Seller and all parties 
claiming by, through or under Seller.

          9.26 SEC Reporting (8-K) Requirements.  For the period of time 
commencing on the date hereof and continuing through the first anniversary of 
the Closing Date, and without limitation of other document production 
otherwise required of Seller hereunder, Seller shall, from time to time, upon 
reasonable advance written notice from Purchaser, provide Purchaser and its 
representatives, with (a) access to all financial information pertaining to 
the period of Seller's ownership and operation of the Property, which 
information is relevant and reasonably necessary, in the opinion of 
Purchaser's outside, third party accountants (the "Accountants"), to enable 
Purchaser and its Accountants to prepare financial statements in compliance 
with any or all of (i) Rule 3-05 or 3-15 of Regulation S-X of the Securities 
and Exchange Commission (the "Commission"), as applicable; (ii) any other 
rule issued by the Commission and applicable to Purchaser; and (iii) any 
registration statement, report or disclosure statement filed with the 
Commission, by, or on behalf of Purchaser; and (b) a representation letter, 
signed by the 




                                      21

<PAGE>


individual(s) responsible for Seller's financial reporting, substantially in 
the form of Schedule 9.26 attached hereto, which representation letter may be 
required by the Accountants in order to render an opinion concerning Seller's 
financial statements.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the dates set forth below.

SELLER:                                   PURCHASER:                      
                                                                          
RREEF MIDAMERICA/EAST FUND-IV             BRANDYWINE OPERATING            
                                          PARTNERSHIP, L.P.               
                                                                          
By:  RREEF America L.L.C., its            By:  Brandywine Realty Trust,   
     investment advisor                        its authorized general     
                                               partner                    
                                                                          
By:________________________________       By:____________________________ 
     Authorized Representative                 Gerard H. Sweeney          
                                               President and Chief        
Dated: ____________________________            Executive Officer          
                                          Dated:_________________________ 





                                     22

<PAGE>

                            List of Schedules and Exhibits

Schedules

2.1                      Escrow Instructions
5.1                      Disclosure Schedule
5.1.5                    Service Contracts
5.1.10                   Rent Roll
5.1.12                   Future Leasing Commissions, Tenant Improvements and 
                         Free Rent
6.2                      Form of Estoppel Letter
8.6.1                    Form of Deed
8.6.2                    FIRPTA Certificate
8.6.4                    Assignment and Assumption of Leases
8.6.5                    Assignment and Assumption of Contracts and Warranties
8.6.6                    Assignment of Intangibles
8.6.8                    Bill of Sale
8.6.10                   Bring-Down Certificate
9.26                     SEC Compliance Representation Letter

Exhibits

A                        Legal Description of Property
A-1                      Descriptive List of the Property 





                                       23

<PAGE>


                                     Schedule 2.1

                          EARNEST MONEY ESCROW INSTRUCTIONS


               (earnest money escrow instructions previously executed) 













<PAGE>

                                     Schedule 5.1

                                 DISCLOSURE SCHEDULE

      A 1996 Environmental Audits was  prepared by ATC Environmental, Inc. 
for the Property.  This Audit has been made available to Purchaser for 
inspection and copying, and, each of the Seller warranties of Section 5.1.8 
and its subparagraphs are qualified and limited by any matters disclosed in 
such Audit.











<PAGE>


                                    Schedule 5.1.5

                                  Service Contracts

A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING 




<PAGE>


                                   Schedule 5.1.10

                                      Rent Roll



<PAGE>


                                   Schedule 5.1.12

            Future Leasing Commissions, Tenant Improvements and Free Rent


1.   If Tozour Trane, the tenant of 741 First Avenue, does not exercise certain
     termination options, commissions may become due to The Flynn Company in the
     amounts of $20,260.50 and $16,109.00 on May 1, 2000 and May 1, 2003,
     respectively. 
<PAGE>
                                       
                                Schedule 6.2

                           TENANT ESTOPPEL LETTER
                                           
                                                       __________ __, 1998



Brandywine Realty Trust
Newtown Square Corporate Campus
16 Campus Boulevard
Newtown Square, PA  19073                                      

Attention:  Gerard H. Sweeney, 
     President and Chief Executive Officer


NationsBank, N.A.,
Real Estate Banking
8300 Greensboro Drive, Suite 300
McLean, VA 22102

Attention: Gary P.F. Carr

               Re:  Lease from ________, for Suite ____, located
                    at [BUILDING ADDRESS]  
                    [CITY/TOWNSHIP], Pennsylvania (the 
"Property")

To Whom it May Concern:

     The undersigned is the holder of the tenant's interest under the lease 
described on Exhibit A attached hereto (the "Lease") demising a portion of 
the Property (the "Leased Premises").  We understand that Brandywine Realty 
Trust, its assignee or nominee ("Brandywine") intends to acquire the 
Property, and that NationsBank, N.A., as Agent for the parties listed on 
Schedule 1 attached hereto ("Lender") may be the holder of a first mortgage 
on the Property, and that Brandywine and Lender require this certification 
from us.

     Accordingly, we hereby certify to Brandywine and Lender as follows:

     1.     The Lease is in full force and effect and has not been modified,
amended or supplemented in any way, except as follows (Insert dates of all
modifications, amendments, or supplements; if none, write "None"):____________
______________________________________________________________________________.

<PAGE>

     2.     There are no other representations, warranties, agreements,
concessions, commitments, or other understandings between the undersigned and
the Landlord regarding the Property other than as set forth in the Lease or
paragraph 1 above.

     3.     The landlord under the Lease has completed and delivered, and the
undersigned has accepted, the Leased Premises in the condition required by the
Lease and the term of the Lease commenced on _________.  The Leased Premises
consists of approximately ___________ square feet.  The undersigned has taken
possession of and is occupying the Leased Premises on a rent-paying basis and
the monthly base rent payable thereunder is $_________, payable in advance.  All
improvements and work required under the Lease to be made by the landlord
thereunder and all facilities required under the Lease to be furnished to the
Leased Premises have been completed to the satisfaction of the undersigned,
except as follows (Insert description of any improvements and work to be
completed by the landlord under the Lease; if none, write "None"):
_____________________________.

     4.     The fixed expiration date set forth in the Lease, excluding renewals
and extensions, is ________________.  The undersigned neither has any option or
right to purchase the Property or any portion thereof nor does the undersigned
have any right or option to terminate the Lease or any of its obligations
thereunder in advance of the scheduled termination date of the Lease as noted
above, except as follows (Insert description of any purchase rights or options,
and/or any early termination rights; if none, write "None"):
_______________________________.
     
     5.  All rents, additional rents and other sums due and payable under the 
Lease have been paid in full and no rents, additional rents or other sums 
payable under the Lease have been paid for more than one (1) month in advance 
of the due dates thereof.

     6.  The landlord under the Lease is not in default under any of the
requirements, provisions, terms, conditions or covenants of the Lease to be
performed or complied with by the landlord under the Lease, and no event has
occurred or situation exists which would, with the passage of time and/or the
giving of notice, constitute a default or an event of default by the landlord
under the Lease.

     7.  The undersigned is not in default under any of the requirements, 
provisions, terms, conditions, or covenants of the Lease to be performed or 
complied with by the undersigned, and no event has occurred or situation 
exists which would, with the passage of time and/or the giving of notice, 
constitute a default or an event of default by the undersigned under the 
Lease.

                                       2
<PAGE>

     8.   The undersigned has received no notice from any governmental 
authority or other person or party claiming a violation of, or requiring 
compliance with, any Federal, State or local statute, ordinance, rule, 
regulation or other requirement of law, for environmental contamination at 
the Leased Premises, to the best knowledge of the undersigned no hazardous, 
toxic or polluting substances or wastes have been generated, treated, 
manufactured, stored, refined, used, handled, transported, released, spilled, 
disposed of or deposited by Tenant on, in or under the Leased Premises.

     9.  Neither the undersigned nor the landlord under the Lease has commenced
any action or given or received any notice for the purpose of terminating the
Lease.

     10.  There are no existing defenses, offsets, claims, or credits against
the payment of rent or the performance of the undersigned's obligations under
the Lease.

     11.  The undersigned has paid to the landlord under the Lease a security
deposit of $____________. 

                                          Very truly yours,

                              


                                          By:
                                              ---------------------------------
                                             Name:
                                             Title:


                                       3

<PAGE>
 
                                      Exhibit A
                               (Description of Lease)  








                                       4

<PAGE>

                                Schedule 8.6.1

                                 Form of Deed

SPECIAL WARRANTY DEED:

THIS INDENTURE made this ____ day of ____________, 1998,

BETWEEN   RREEF MIDAMERICA/EAST FUND-IV, A CALIFORNIA GROUP TRUST
                    (hereinafter called the Grantor/s), of the one part and

          _____________________
                    (hereinafter called the Grantee/s), of the second part,

WITNESSETH That in consideration of Ten and No/100 Dollars ($10.00) in hand
paid, the receipt whereof is hereby acknowledged, the said Grantor/s do/does
hereby grant, bargain, sell and convey unto the said Grantee/s, his/her/their
successors and /or assigns,

ALL THAT CERTAIN real estate, situated in the County of Montgomery and
Commonwealth of Pennsylvania known and described on the attached Exhibit A
"Legal Description," attached hereto an hereby made a part hereof.

TOGETHER with all and singular the buildings, improvements, ways, streets,
alleys, driveways, passages, waters, water-courses, rights, liberties,
privileges, hereditaments and appurtenances whatsoever unto the hereby granted
premises belonging, or in anywise appertaining, and the reversions and
remainders, rents, issues and profits thereof; and all the estate, right, title,
interest, use, trust, property, possession, claim and demand whatsoever of
Grantor as well at law as in equity, of, in, and to the same.

TO HAVE AND TO HOLD the said lot or piece of ground described with the buildings
and improvements thereon erected, hereditaments and premises hereby granted, or
mentioned and intended so to be, with the appurtenances unto the said Grantee,
and its successors and assigns to and for the only proper use and behoof of the
said Grantee, and its successors and assigns, forever.

AND the said Grantor/s do/does hereby covenant to and with the said Grantee/s
that he/she/they, the said Grantor/s, his/her/their successors and/or assigns,
SHALL AND WILL warrant specially and forever defend the herein above described
premises, with the hereditaments and appurtenances, unto the said Grantor/s and
against every other person lawfully claiming or who shall hereafter claim the
same or any part thereof, by, from and under his/her/their successors and/or
assigns or any of them, subject to validly and legally existing encumbrances of
record.

IN WITNESS WHEREOF, the said Grantor/s has/have caused these presents to be duly
executed, the day and year first above written.


<PAGE>

ATTEST:                                RREEF MIDAMERICA/EAST FUND-IV,      
                                       a California group trust            
                                                                           
By:___________________________         By:  RREEF America L.L.C., a        
                                       Delaware limited liability company, 
                                       its investment advisor              
                                                                           
                                            By:_______________________     
                                               Authorized Representative   


[Add Pennsylvania address certification] 





                                       2

<PAGE>

STATE OF _____________________)
                              )    SS.
COUNTY OF ____________________)


     I,_______________________________________________, a notary public in and
for said County, in the State aforesaid, DO HEREBY CERTIFY that ______________
__________________ and ___________________________, personally known to me to be
the ______________________ and ______________ of RREEF MIDAMERICA/EAST FUND-IV,
a California group trust, and personally known to me to be the same persons
whose names are subscribed to the foregoing instrument, appeared before me this
day in person and acknowledged that as such __________________________ and 
_________________, they signed and delivered the said instrument as their free 
and voluntary act, and as the free and voluntary act and deed of said trust, 
for the uses and purposes therein set forth.

     GIVEN under my hand and official seal this ____ day of _________________, 
1998.




                                             ----------------------------------
                                             Notary Public


Commission expires 
                   ------------------------------------------------------------




                                       3

<PAGE>

                                   EXHIBIT A


                               Legal Description


<PAGE>
                                       
                               Schedule 8.6.2
     
                              FIRPTA CERTIFICATE
 
     Section 1445 of the Internal Revenue Code provides that a transferee of a
U.S. real property interest must withhold tax if the transferor is a foreign
person.  To inform the transferee that withholding of tax is not required upon
the disposition of a U.S. real property interest by __________________________
__________________________________________, a _______________________ ("Seller")
hereby certifies the following:

1.   Seller is not a foreign corporation, foreign partnership, foreign trust or
     foreign estate (as those terms are defined in the Internal Revenue Code and
     Income Tax Regulations);

2.   Seller's U.S. employer identification number is 94-6566801; and

3.   Seller's principal place of business is 101 California Street, 26th 
     floor, San Francisco, CA 94111-5853

     Seller understands that this certification may be disclosed to the 
Internal Revenue Service by transferee and that any false statement contained 
herein could be punished by fine, imprisonment, or both.

     Under penalties of perjury I declare that I have examined this 
certification and to the best of my knowledge and belief it is true, correct 
and complete, and I further declare that I have authority to sign this 
document on behalf of Seller. 

                                       ________________________________________

                                       ________________________________________



                                       By: ____________________________________
                                            Authorized Representative
 

Subscribed and sworn to
before me this ____ day of
______, 1998. 


______________________________
Notary Public 

                                       
<PAGE>

                                Schedule 8.6.4

                    ASSIGNMENT AND ASSUMPTION OF LEASES


          THIS ASSIGNMENT AND ASSUMPTION OF LEASES (the "Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between _________________________________________,
a Delaware corporation, ("Assignor") and ________________, a _______________
("Assignee").

     A.   Assignor is the lessor under certain leases executed with respect 
to that certain real property and improvements thereon known as 
____________________, _______________________, and more particularly 
described in Exhibit "A" attached hereto (the "Property"), which leases are 
described in Exhibit B attached hereto (the "Leases").

     B.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase the Property from Assignor and 
Assignor agreed to sell the Property to Assignee, on the terms and conditions 
contained therein.

     C.   Assignor desires to assign its interest as lessor in the Leases to
Assignee, and Assignee desires to accept the assignment thereof, on the terms
and conditions below.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date") [SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the Leases except rents and other sums due Assignor first accruing on or
prior to the Conveyance Date, and, effective as of the day following the
Conveyance Date,  Assignee hereby accepts such assignment.

     2.   Assignor hereby assumes full responsibility for all obligations and
defaults of landlord under the Leases accruing prior to and including the
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee
harmless from any claims, liabilities or costs (including reasonable attorneys'
fees) arising from Assignor's failure to perform said obligations, provided that
Assignee makes a claim hereunder on or before one (1) year following the
Conveyance Date.

     3.   Assignee hereby assumes full responsibility for all obligations of
landlord under the Leases accruing after the Conveyance Date and Assignee hereby
agrees to defend, indemnify and hold Assignor harmless from any claims,
liabilities or costs (including reasonable attorneys' fees) arising from
Assignee's failure to perform said obligations.  Without limiting the generality


<PAGE>

of the foregoing, Assignee assumes full responsibility for the free rent, unpaid
tenant improvement allowances and leasing commissions under the Leases as listed
on Exhibit C.

     4.   This Assignment shall be governed by the laws of the Commonwealth of
Pennsylvania.

     5.   This Assignment may be executed in counterparts.

     6.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers.  


    IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment and
Assumption of Leases.


ASSIGNOR:                              ASSIGNEE:                        
                                                                        
_______________________________        _______________________________  

_______________________________        _______________________________  
                                                                        
                                                                        
By:____________________________        By:____________________________  
     Authorized Representative                                          
                                       Title:_________________________  
                                                                        
Dated:_________________________        Dated:_________________________  






                                       2

<PAGE>
 
                                   EXHIBIT A

                               Legal Description















                                       3
<PAGE>
                                       
                                   EXHIBIT B

                               Existing Leases

                         (rent roll to be attached) 







                                       4

<PAGE>

                                   EXHIBIT C

      Free Rent, Tenant Improvement Allowances and Leasing Commissions 










                                       5

<PAGE>

                                Schedule 8.6.5

           ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES

          THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES (the
"Assignment") dated as the dates of execution set forth below, but effective as
of the Conveyance Date (as herein defined), is between
_____________________________ ___________________________________, ("Assignor")
and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a condition
precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date")[SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the following:

     2.   Assignor hereby grants, transfers and assigns to Assignee all the
right, title and interest of Assignor in and to the following:

          (a) All contracts listed on Exhibit B attached hereto.

          (b) All presently effective and assignable warranties, guaranties,
representations or covenants given to or made in favor of Assignor or Assignor's
affiliates in connection with the acquisition, development, construction,
maintenance, repair, renovation or inspection of the Property.

     The foregoing are collectively referred to herein as the "Contracts."

     3.   Assignor hereby assumes full responsibility for all obligations and
defaults of Assignor under the Contracts accruing to and including the
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee
harmless from any claims, liabilities or costs (including reasonable attorneys'
fees) arising from Assignor's failure to perform said obligations, provided that
Assignee makes a claim hereunder on or before one (1) year following the
Conveyance Date.


<PAGE>

     4.   Assignee hereby assumes full responsibility for all obligations of 
owner of the Property under the Contracts accruing after the Conveyance Date 
and Assignee hereby agrees to defend, indemnify and hold Assignor harmless 
from any claims, liabilities or costs (including reasonable attorneys' fees) 
arising from Assignee's failure to perform said obligations.

     5.   This Assignment shall be governed by the laws of the Commonwealth of
Pennsylvania.

     6.   This Assignment may be executed in counterparts.

     7.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers.  

      IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment
and Assumption of Contracts and Warranties.


ASSIGNOR:                              ASSIGNEE:                        
                                                                        
_______________________________        _______________________________  

_______________________________        _______________________________  
                                                                        
                                                                        
By:____________________________        By:____________________________  
     Authorized Representative                                          
                                       Title:_________________________  
                                                                        
Dated:_________________________        Dated:_________________________  
              
 
 
                                       2

<PAGE>
 
                                   EXHIBIT A

                               Legal Description








                                       3
<PAGE>

                                   EXHIBIT B

                                   Contracts


A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING 


                                       4

<PAGE>

                                Schedule 8.6.6

                           ASSIGNMENT OF INTANGIBLES

          THIS ASSIGNMENT AND ASSUMPTION OF INTANGIBLES ("Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between ______________________________________, 
("Assignor") and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a condition
precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:


     1.   As of the date on which the Property is conveyed to Assignee pursuant
to the Agreement (the "Conveyance Date")[SHOULD BE THE DAY FOLLOWING CLOSING],
Assignor hereby assigns to Assignee all of its right, title, and interest in and
to the following:

          (i)  All licenses, permits, certificates of occupancy, approvals,
     dedications, subdivision maps or plats and entitlements issued, approved or
     granted by federal, state or municipal authorities or otherwise in
     connection with the Property and its renovation, construction, use,
     maintenance, repair, leasing and operation; and all licenses, consents,
     easements, rights of way and approvals required from private parties to
     make use of utilities, to insure pedestrian ingress and egress to the
     Property and to insure continued use of any vaults under public rights-of-
     way presently used in the operation of the Property.  

          (ii)  any trade style or trade name used in connection with the
     Property; and,

          (iii)  all correspondence with the tenants under tenant leases, all
     booklets and manuals relating to the maintenance and operation of the
     Property. 

     The foregoing are collectively referred to herein as the "Intangibles".  

     2.   Assignor agrees to assume full responsibility for its obligations
under the Intangibles accruing on or prior to the Conveyance Date  and Assignor
agrees to defend, indemnify and hold Assignee harmless from any claims,
liabilities or costs arising from 


<PAGE>

Assignor's failure to perform said obligations, provided that Assignee makes 
a claim hereunder on or before one (1) year following the Conveyance Date.

     3.   Assignee assumes full responsibility for all obligations of the owner
of the property accruing under the Intangibles from the day after the Conveyance
Date  and Assignee agrees to defend, indemnify and hold Assignor and its
predecessors in title harmless from all claims, liabilities or costs arising
from Assignee's failure to perform said obligations.

     4.   This instrument may be executed in counterparts.

     5.   The obligations of Assignor contained herein are intended to be
binding only on the property of the Assignor and shall not be personally binding
upon, nor shall any resort be had to the private properties of, any of the
investment managers of Assignor, or any general partners thereof, or any
employees or agents of the  investment managers

     IN WITNESS WHEREOF, the parties have executed this Assignment of
Intangibles. 


ASSIGNOR:                              ASSIGNEE:                      
                                                                      
_______________________                ______________________________ 

_____________________________,         ______________________________ 
                                                                      
                                                                      
By:                                    By:                            
     Authorized Representative                                        
                                       Title:                         
                                                                      
Dated:                                 Dated:                         








                                       2
<PAGE>

                                   EXHIBIT A

                               Legal Description




                                       3
<PAGE>
 
                                 Schedule 8.6.8

                                  BILL OF SALE


     ________________________________________________________________________ 
("Seller"), in consideration of Ten and No/100 Dollars and other good and 
valuable consideration, the receipt and sufficiency of which is hereby 
acknowledged, hereby sells, transfers, assigns and sets over unto 
__________________ ("Purchaser"), all of its right, title and interest in and 
to any and all personal property, which personal property is owned by Seller 
and located on the real estate legally described on Exhibit A attached hereto 
(the "Personal Property"), including, but not limited to, the Personal 
Property listed on Exhibit B.

     Seller hereby represents and warrants to Purchaser that Seller is the
absolute owner of the Personal Property free and clear of all liens, charges and
encumbrances, and that Seller has full right, power and authority to sell the
Personal Property and to make this Bill of Sale. All warranties of quality,
fitness and merchantability are hereby excluded. 

     The obligations of Seller contained herein are intended to be binding only
on the property of the Seller and shall not be personally binding upon, nor
shall any resort be had to the private properties of, any of the investment
managers of Seller, or any general partners thereof, or any employees or agents
of the  investment managers


    IN WITNESS WHEREOF, Seller has executed this Bill of Sale as of the ___ day
of _______, 1998, but effective on the date on which the Property is conveyed by
Seller to Purchaser.
 


                                       ______________________________


                                       ______________________________ 
                                       

                                       By:___________________________
                                            Authorized Representative 

 


<PAGE>

STATE OF _________       )
                         )  SS
COUNTY OF ________       )


          The undersigned, a Notary Public in and for said County in the State
aforesaid, DOES HEREBY CERTIFY that ________________, authorized representative
of _________________________________________________________________, who is
personally known to me to be the same person whose name is subscribed to the
foregoing instrument as such authorized representative, appeared before me this
day in person and acknowledged that __he, being duly authorized, signed, sealed
and delivered the said instrument as h___ free and voluntary act, and as the
free and voluntary acts of said corporation, for the uses and purposes therein
set forth.

          GIVEN under my hand and Notarial Seal this _____ day of
______________, 1998.


                                        _______________________
                                          Notary Public


My Commission Expires:

____________________, 19___








                                       2
<PAGE>
 
                                   EXHIBIT A

                               Legal Description






                                       3
<PAGE>

                                   EXHIBIT B

                               Personal Property

                                     (none) 






<PAGE>

                                Schedule 8.6.10

                         SELLER'S CLOSING CERTIFICATE


     THIS CLOSING CERTIFICATE is made as of the ___ day of ________________, 
1998, by and between ______________________________________________________  
("Seller"), to and in favor of ____________________________________________, 
a __________ ("Purchaser"), under and pursuant to that certain Agreement of 
Purchase and Sale by and between Seller and __________, with an Effective 
Date as defined therein (the "Agreement"), for the purchase and sale of that 
certain Property situated in the _________, _______ County, ____________ (as 
defined in the Agreement).

     Pursuant to Paragraphs 5.3 and 8.6.10 of the Agreement and except as
disclosed on Exhibit A attached hereto and made a part hereof, Seller hereby
reconfirms, remakes and rewarrants to Purchaser as of the date hereof each of
the representations, warranties and covenants given by Seller contained in
Paragraph 5.1 of the Agreement in the same manner as such representations,
warranties and covenants were given in the Agreement, each of which is
incorporated herein and made a part hereof by this reference.  Except as
modified hereby, Seller hereby confirms that each of said representations,
warranties and covenants are true and accurate in all material respect as of the
date hereof.  Seller's reconfirming, remaking and rewarranting of its
representations, warranties and covenants is subject to the limitations set
forth in Paragraph  5.3 of the Agreement.

     The obligations of Seller contained herein are intended to be binding only
on the property of the Seller and shall not be personally binding upon, nor
shall any resort be had to the private properties of, any of the investment
managers of Seller, or any general partners thereof, or any employees or agents
of the  investment managers

     IN WITNESS WHEREOF, Seller has executed this Closing Certificate on the day
and year first above written, but effective upon the date on which the Property
is conveyed by Seller to Purchaser.

SELLER:

_____________________________

_____________________________


By: _____________________________
     Authorized Signatory

                                       
<PAGE>

                                   EXHIBIT A

                                   Disclosure
 








<PAGE>

                                 Schedule 9.7.2

New Lease Approval Form

Property: ___________________________________________________________________

Tenant: _____________________________________________________________________

Square Feet: ________________________________________________________________

Location: ___________________________

Anticipated Lease Commencement: _____________________________________________

Anticipated Rent Commencement: ______________________________________________

Term: _______________________________________________________________________

FREE RENT: __________________________________________________________________

Rental Rate:             Period            PSF Rate         Annual Income

                   ________________    ________________    ________________

                   ________________    ________________    ________________

                   ________________    ________________    ________________


Note: Above rental rates do not include Tenant Electric

Tenant Improvement Allowance: PSF ______________ Amount ___________________ T.I.

Mechanism: ___________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


OPTIONS:           ________________    ________________    ________________

                   ________________    ________________    ________________

                   ________________    ________________    ________________
               

Initial Commission:

     BROKER                %                            Amount

__________________  _______________  _________________________________________

__________________  _______________  _________________________________________

 
Broker Future Entitlements: __________________________________________________

______________________________________________________________________________

______________________________________________________________________________

                                                         
Other Comments: ______________________________________________________________

______________________________________________________________________________

______________________________________________________________________________
                                                                     

Approved By: ________________

                                       
<PAGE>
                                 Schedule 9.26

                     SEC COMPLIANCE REPRESENTATION LETTER

(Accountant Name & Address)

Dear Sirs:

     In connection with your audit of the statement of revenues and certain
expenses of the Property situated in the City of King of Prussia, Montgomery
County, Pennsylvania, commonly known as 741 First Avenue (the "Property") for
the year ended December 31, 199__ (the "Operating Statement"), prepared for the
purpose of complying with the rules and regulations of the Securities and
Exchange Commission, the undersigned ("Seller") makes the following limited,
qualified and specific representations, which are true to Seller's knowledge (as
such phrase is hereinafter defined):

     1.   Seller has made available or caused its property manager to make
          available to Brandywine Operating Partnership, L.P.  ("Buyer"), or its
          representatives, Seller's financial records and files in Seller's
          actual possession pertaining to the operation of the Property (such
          records and files being collectively referred to herein as the
          "Files").

     2.   Except as disclosed in the Files, Seller is not aware of any events or
          transactions which have occurred since December 31, 199_ and prior to
          the date hereof that would have a material effect on the Operating
          Statement for the period then ended.

     3.   We recognize that, as the Owner of the Property, we are responsible
          for directing the fair presentation of the Operating Statement.  We
          believe the Operating Statement is fairly presented in conformity with
          generally accepted accounting principals.

     As used in this letter, the words "Seller's knowledge" shall be deemed to
mean, and shall be limited to, the actual (as distinguished from implied,
imputed or constructive) knowledge of Joseph S. Cappelletti and Barbara
Gillentine without such person having any obligation to make an independent
inquiry or investigation.

     Notwithstanding any provision in this letter to the contrary, Seller is
executing this letter solely as an accommodation to and at the request of Buyer
and, except to the extent Seller is liable to Buyer for representations and
warranties expressly set forth in that certain Agreement of Purchase and Sale,
dated _________ 1998, by and between Seller and Buyer (the "Sale Agreement"),
this letter is subject to the condition that Seller shall not be liable or
responsible to Buyer, any parent, subsidiary or other affiliate of Buyer, or any
officer, director, employee, agent, representative, shareholder, partner or
principal of Buyer or any such parent, subsidiary or other affiliate thereof or
any accountant or other professionals engaged by or on behalf of any of the
foregoing, including, without limitation, [accountant] (all of the foregoing
being collectively referred to herein as the "Buyer Parties"), as a result of
the fact that any of the statements made herein are in any way inaccurate,
untrue or incorrect.  By the acceptance of this letter, except for rights and
remedies that Buyer may have under the Sale Agreement with respect to
representations and warranties expressly set forth in the Sale Agreement, each
of the Buyer Parties shall be deemed to have waived any and all rights and
remedies that any of them may have against Seller, whether at law or in equity,
as a result of the fact that any of the statements made herein are in any way
inaccurate, untrue or incorrect.

                                       4
<PAGE>

     Seller has executed this letter for the limited purposes set forth herein,
and for the use of [accountant] only.  No other parties may rely on the
statements set forth herein.

                                       Very truly yours,

                                       RREEF MIDAMERICA/EAST FUND-IV, 
                                       a California group trust

                                       By:  RREEF America L.L.C.,
                                            a Delaware limited liability company

                                       By:_______________________________
                                       Name:   Joseph S. Cappelletti
                                       Title:  Its Authorized Representative


                                       By:  __________________________________
                                       Name:   Barbara J. Gillentine
                                       Title:  Its Authorized Representative



                                       5

<PAGE>

                                      EXHIBIT A

                            Legal Description of Property







<PAGE>
                                                                  Exhibit 10.3

                            AGREEMENT OF PURCHASE AND SALE


                                       between


                  Brandywine Operating Partnership, L.P., Purchaser,


                                         and


                       RREEF MidAmerica East-V Six, Inc., Seller


                     180 Wheeler Court, Bucks County, Pennsylvania




                                           
<PAGE>

                                  Table of Contents



     1.   Purchase Price.. . . . . . . . . . . . . . . . . . . . . . . . . . .1

     2.   Deposit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

     3.   Review of the Property.. . . . . . . . . . . . . . . . . . . . . . .2

     4.   Title and Survey.. . . . . . . . . . . . . . . . . . . . . . . . . .3

     5.   Representations and Warranties.. . . . . . . . . . . . . . . . . . .4
               5.1  Representations and Warranties of Seller.. . . . . . . . .4
               5.2  Representations and Warranties of Purchaser. . . . . . . .7
               5.3  Limitations.   . . . . . . . . . . . . . . . . . . . . . .7
               5.4  Condition of Property. . . . . . . . . . . . . . . . . . .8

     6.   Closing Conditions.. . . . . . . . . . . . . . . . . . . . . . . . .8
               6.1  Title Insurance. . . . . . . . . . . . . . . . . . . . . .8
               6.2  Estoppel Letters . . . . . . . . . . . . . . . . . . . . .8
               6.3  Representations and Warranties . . . . . . . . . . . . . .9
               6.4  Seller Performance . . . . . . . . . . . . . . . . . . . .9

     7.   Other Agreements.. . . . . . . . . . . . . . . . . . . . . . . . . .9

     8.   Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
               8.1  Closing of Sale. . . . . . . . . . . . . . . . . . . . . 10
               8.2  Prorations; Adjustments. . . . . . . . . . . . . . . . . 10
               8.3  Proration of Service Charges.. . . . . . . . . . . . . . 11
               8.4  Closing Costs. . . . . . . . . . . . . . . . . . . . . . 12
               8.5  Possession.. . . . . . . . . . . . . . . . . . . . . . . 12
               8.6  Seller's Closing Documents.. . . . . . . . . . . . . . . 12
               8.7  Purchaser's Closing Documents. . . . . . . . . . . . . . 13
               8.8  Joint Deliveries.. . . . . . . . . . . . . . . . . . . . 14

     9.   Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . 14
               9.1  Modifications. . . . . . . . . . . . . . . . . . . . . . 14
               9.2  Casualty and Condemnation. . . . . . . . . . . . . . . . 14
               9.3  Time of Essence. . . . . . . . . . . . . . . . . . . . . 14
               9.4  Notices. . . . . . . . . . . . . . . . . . . . . . . . . 14
               9.5  Parties Bound. . . . . . . . . . . . . . . . . . . . . . 16
               9.6  Governing Law. . . . . . . . . . . . . . . . . . . . . . 16
     
     
     
                                          i
<PAGE>

     
     
               9.7  Continuation Until Closing; Leasing. . . . . . . . . . . 16
               9.8  Brokers. . . . . . . . . . . . . . . . . . . . . . . . . 16
               9.9  Attorneys' Fees. . . . . . . . . . . . . . . . . . . . . 17
               9.10 Remedies for Non-Performance.. . . . . . . . . . . . . . 17
               9.11 Brokers Commission.. . . . . . . . . . . . . . . . . . . 17
               9.12 Survival of Covenants. . . . . . . . . . . . . . . . . . 17
               9.13 Seller's Investment Committee Approval.. . . . . . . . . 17
               9.14 ERISA. . . . . . . . . . . . . . . . . . . . . . . . . . 17
               9.15 Entry and Indemnity. . . . . . . . . . . . . . . . . . . 18
               9.16 Release. . . . . . . . . . . . . . . . . . . . . . . . . 18
               9.17 Confidential Information.  . . . . . . . . . . . . . . . 19
               9.18 Calculation of Time Periods. . . . . . . . . . . . . . . 19
               9.19 Entire Agreement.. . . . . . . . . . . . . . . . . . . . 19
               9.20 Severability.. . . . . . . . . . . . . . . . . . . . . . 20
               9.21 Facsimile Signatures.. . . . . . . . . . . . . . . . . . 20
               9.22 Further Assurances.. . . . . . . . . . . . . . . . . . . 20
               9.23 Offer. . . . . . . . . . . . . . . . . . . . . . . . . . 20
               9.24 Seller Exculpation Clause. . . . . . . . . . . . . . . . 20
               9.25 Purchaser Exculpation Clause.. . . . . . . . . . . . . . 21
               9.26 SEC Reporting (8-K) Requirements.. . . . . . . . . . . . 21

List of Schedules and Exhibits . . . . . . . . . . . . . . . . . . . . . . . 23




                                          ii
<PAGE>

 
                            AGREEMENT OF PURCHASE AND SALE


     BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited partnership 
("Purchaser") agrees to purchase, and RREEF MIDAMERICA EAST-V SIX, INC., a 
Delaware Corporation ("Seller") agrees to sell, that certain improved real 
property, hereinafter referred to as the "Property", situated in Bucks 
County, Commonwealth of Pennsylvania, legally described on Exhibit A attached 
hereto and made a part hereof, consisting of a single parcel of real estate 
improved with a building commonly known as 180 Wheeler Court, Bucks County, 
Pennsylvania, together with all rights, privileges, easements and 
appurtenances thereto, including any and all mineral rights, development 
rights, air rights, and the like; all personal property owned by the Seller 
and located on or used in conjunction with the Property (specifically 
excluding furniture, fixtures and equipment owned by RREEF Management Company 
and located in the RREEF Management Company office); any and all intangible 
personal property owned by Seller and used in the operation of the Property, 
including the right to use the name of the property (but not the name 
"RREEF"), to the extent assignable, but excluding computer software and 
related licenses; contract rights, "Leases" of all or any part of the 
Property, all licenses, permits and other written authorizations necessary 
for the use, operation and ownership of the Property, records, security 
deposits and prepaid rent, if any, and the benefit of any guaranties of the 
Leases.

     1.   Purchase Price.  The purchase price for the Property ("Purchase
Price") is Two Million Eight Hundred Thousand Dollars ($2,800,000.00), payable
by wire transfer of immediately available funds at Closing as defined in
Paragraph 8.1.

     2.   Deposit.  

          2.1  Purchaser has previously deposited, pursuant to this Agreement 
and pursuant to the Other Agreements (defined in Paragraph 7 below) the 
amount of Five Hundred Fifty Thousand Dollars ($550,000.00) (the "Deposit") 
with Commonwealth Land Title Insurance Company ("Escrow Holder") as earnest 
money to secure Purchaser's performance hereunder and under the Other 
Agreements.  The Deposit may be invested at the direction of Purchaser with 
the approval of Seller.  All investment income earned from the investment of 
the Deposit, less investment fees, if any, will be added to and become a part 
of the Deposit and will be applied toward the Purchase Price under the KOP 
Agreement (defined in Paragraph 7) if Closing is completed in accordance with 
this Agreement; otherwise all interest will be paid to the party entitled to 
the Deposit.  The escrow instructions to Escrow Holder will be in the form of 
Schedule 2.1 attached hereto (the "Escrow Instructions").   If Purchaser does 
not elect to terminate this Agreement pursuant to Section 3 below, prior to 
the end of the Review Period (defined in Section 3.4), on or before one 
business day after last day of the Review Period Purchaser shall deposit an 
additional $500,000 with Escrow Holder, which shall be added to and become a 
part of the Deposit for all purposes hereunder.

                                           
<PAGE>




          2.2  Of the total Deposit, the sum of $150,000 is agreed to be
non-refundable, and shall be refunded to Purchaser only (i) if Purchaser
terminates this Agreement under Section 3.4, under the circumstances set forth
in Section 3.4.1, or (ii) if the Agreement is terminated or if the Closing fails
to occur by reason of Seller's default.  Under all other circumstances, wherever
under this Agreement and the Other Agreements the Deposit is to be returned to
Purchaser, $150,000 out of the Deposit shall be paid to Seller, to be retained
by Seller as fully earned.

     3.   Review of the Property. 

          3.1  From and after the "Effective Date" (as defined in Paragraph
9.23), Seller agrees to provide Purchaser and its agents or consultants with
access to the Property to inspect each and every part thereof to determine its
present condition and to conduct such physical and environmental studies
(including a mechanical and roof study and Phase I environmental assessment) as
it deems appropriate.  

          3.2  Within three (3) business days after the Effective Date Seller 
will make available to Purchaser for inspection and copying, all to the 
extent in the possession of Seller or its managing agent, a copy of each 
existing Lease and equipment lease, service contract and maintenance or other 
contract pertaining to the operations of the Property that will survive 
Closing, a copy of each  real estate tax bills for 1994-1996, both inclusive, 
and unaudited financial statements for the Property for the years 1994-1996, 
both inclusive.

          3.3  Within three (3) business days after the Effective Date Seller
will make available to Purchaser for inspection and copying at the office of
Seller's managing agent, all to the extent in the possession of Seller or its
managing agent:

               3.3.1  a copy of each environmental reports relating to the
Property prepared by third party consultants since January 1, 1995.

               3.3.2  a copy of each current franchises, business or other
licenses, bonds, permits, certificates, authorizations and other evidences of
consent, approval, authorization or permission relating to or affecting the
Project of or from any person, including any governmental authority, held by
Seller, including any pending applications.

               3.3.3  a copy of each material third party warranties and
guaranties, if  any, which are in effect with respect to the Property.

          3.4  Purchaser has until 5:00 p.m. CST on February 2, 1998 (the
"Review Period"), to determine in its sole discretion whether all matters
relating to the Property (except title and survey, which are governed by
Paragraph 4), are acceptable, and to obtain the approval of the transaction
contemplated herein by Seller's Board of Directors.  If Purchaser concludes that
any matter relating to the Property is not acceptable or that its Board has
disapproved the 



                                          2
<PAGE>


transaction, Purchaser will so notify Seller (the "Termination Notice") prior to
the expiration of the Review Period (which notice shall contain a copy of
Purchaser's roof/structural report and other reports or studies, other than
environmental reports, obtained in connection with Purchaser's due diligence). 
Upon timely delivery of the Termination Notice,  this Agreement will terminate
without liability on the part of Seller or Purchaser, other than Purchaser's
indemnity contained in Paragraph 9.15 hereof and the obligation to deliver to
Seller a copy of any environmental report obtained by Purchaser if requested by
Seller within ten (10) days after receipt of the Termination Notice.  In the
event that Purchaser does not timely so notify Seller, Purchaser will be deemed
to have concluded that all matters relating to the Property are acceptable and
to have elected to proceed with the transaction upon the terms and conditions
contained in this Agreement (including the obligation to increase the amount of
the Deposit by an additional $500,000) without regard to this Paragraph 3.4. 

               3.4.1  If this Agreement is terminated pursuant to Paragraph
3.4, the Deposit, less $150,000, will be returned to Purchaser as provided in
the Escrow Instructions.  This $150,000 shall be paid to Seller, unless
Purchaser's termination resulted from (i) Seller's default, (ii) a material
deviation from the economics of the Property as presented in Seller's offering
memorandum (it being understood and agreed that Seller makes no warranty or
representation as to said offering memorandum), or (iii) any material structural
or environmental defect in the Property not known or disclosed to Purchaser
before December 22, 1997.

          3.5  Purchaser agrees that any information obtained by Purchaser or
its authorized agents in the conduct of its due diligence will be treated as
confidential pursuant to Paragraph 9.17.

     4.   Title and Survey.  Purchaser has ordered, at its expense (and upon
receipt, Purchaser shall promptly deliver copies to Seller): (i) a commitment
for a 1992 form ALTA Owner's title insurance policy with respect to the Property
from Commonwealth Land Title Insurance Company (the "Title Insurer") in the
amount of the Purchase Price, and (ii) copies of all documents relating to title
exceptions referred to therein.  Seller has already ordered, and Purchaser has
received, at Purchaser's sole expense, a plat of survey of the Property made in
accordance with Minimum Standard Detail Requirements for ALTA/ACSM Land Title
Surveys (1992) pursuant to the accuracy standards of an Urban Survey.  On or
before January 30, 1998, Purchaser agrees to notify Seller of any objection
Purchaser may have to any exceptions reported in the commitment or any matter
shown on the plat of survey (the "Unacceptable Exceptions").  Seller will be
responsible for satisfaction of the Title Insurer's Schedule B-1 seller
requirements.  All other exceptions and survey matters will be deemed acceptable
to Purchaser.  If Purchaser fails to give such notice to Seller, the survey and
all of the exceptions in the title commitment will be deemed acceptable to
Purchaser.  Seller will have ten (10) days after receipt of Purchaser's notice
within which to notify Purchaser whether Seller elects to either (a)  eliminate
or induce the Title Insurer to insure over (subject to Purchaser's consent, not
to be unreasonably withheld) the Unacceptable Exceptions or (b) terminate this
Agreement.  If Seller agrees to eliminate or induce to the Title Insurer to
insure over (with Purchaser's consent) the 



                                          3
<PAGE>



Unacceptable Exceptions, Seller will be obligated to do so at its cost on or
prior to Closing.   If Seller elects to terminate this Agreement, neither party
will have any further rights or obligations hereunder, except as provided in
Paragraph 9.15.  If Seller fails to give any timely notice, Seller will be
deemed to have elected to terminate this Agreement.  If  any other recorded
exception to title is discovered after the commitment is delivered to Purchaser,
and Purchaser does not elect to waive such exception upon the first to occur of
(a) the Closing or (b) seven (7) days after being notified of such exception and
to proceed with the consummation of the Closing, Seller will have fifteen (15)
days after the expiration of said seven (7) day period (and Closing will be
delayed if necessary, so that it occurs not earlier than twenty-two (22) days
after Purchaser is notified of such exception) after notifying Purchaser of such
discovery in which to use commercially reasonable efforts to eliminate or to
induce the Title Insurer to insure over (subject to Purchaser's approval, not to
be unreasonably withheld) such exception, and if such exception is not
eliminated or insured over as aforesaid within said 15-day period, Purchaser may
terminate this Agreement, in which event the Deposit will be returned to
Purchaser and neither party will have any further rights or obligations
hereunder except as provided in Paragraph 9.15, or close the sale subject to
such exception.  Seller agrees that it will pay off at Closing (and not induce
the Title Insurer to insure over) title exceptions representing monetary liens
of a definite or ascertainable amount voluntarily granted by Seller.  In using
commercially reasonable efforts to eliminate or to induce the Title Insurer to
insure over Unacceptable Exceptions, Seller will not be required to litigate or
to expend more than $10,000 in the aggregate.  Ad valorem real estate taxes not
yet due and payable and all title and survey matters which are not Unacceptable
Exceptions are hereinafter referred to as Acceptable Exceptions. 

     5.   Representations and Warranties.
 
          5.1  Representations and Warranties of Seller.  As used in this
Paragraph 5.1 and elsewhere in this Agreement, the phrase "to the knowledge of
Seller" or phrases of similar import mean and are limited to the actual current 
knowledge, without duty to investigate or inquire, of Seller's portfolio manager
(Pamela Boneham) and Seller's local manager  having ongoing management
responsibility with respect to the Property (Barbara Gillentine), and not to any
constructive knowledge of any of the foregoing individuals or of Seller or any
investment advisor to Seller, any entity that is a partner in such investment
advisor, or any affiliates of any thereof, or to any officer, agent,
representative, or employee of Seller or such investment advisor, any such
constituent partner, or any such affiliate.  Seller hereby warrants and
represents to Purchaser (with such representations and warranties to be re-made
as of Closing pursuant to Paragraph 8.6.10) as follows:

               5.1.1  Pending Proceedings.  With the exception of the items
set forth in  Schedule 5.1 (the "Disclosure Schedule") to the knowledge of
Seller, Seller has received no written notice of special assessments,
condemnation, environmental, zoning or other land use regulation proceedings,
either pending or planned to be instituted, with respect to the Property or any
part thereof.   


                                          4
<PAGE>



               5.1.2  Status of Seller and Closing Documents.  Subject to
Paragraph 9.13, this Agreement has been, and all the closing documents to be
delivered by Seller to Purchaser at Closing are or will be, duly authorized,
executed, and delivered by Seller, will be sufficient to convey insurable title,
are legal, valid, and binding obligations of Seller, are enforceable in
accordance with their respective terms, and do not violate any provisions of any
agreement to which Seller or the Property is subject or bound.  Seller is duly
organized and validly existing and, if required, duly qualified to transact
business in the State in which the Property is located.  

               5.1.3  Non-Foreign Status.  Seller is not a foreign person
within the meaning of Section 1445(f)(3) of the Internal Revenue Code of 1986,
as amended.

               5.1.4  Compliance with Laws.  With the exception of the items
set forth in the Disclosure Schedule, Seller has received no governmental
notice, not heretofore corrected, alleging that the Property or its current uses
are in violation of any zoning, building, health, traffic, environmental, flood
control or all other applicable rules, regulations, codes, ordinances, or
statutes of any local, state and federal authorities or any other governmental
authority (collectively, the "Laws") asserting jurisdiction over the Property. 

               5.1.5  Service Contracts.  With the exception of the items set
forth in the Disclosure Schedule, to Seller's knowledge, there are no agreements
or contracts affecting the Property (including, without limitation, any
management, leasing, services or maintenance agreements) which are not
terminable at will by Seller without further liability, upon not more than 30
days' prior written notice.  The contracts and agreements to be assigned to
Purchaser pursuant to Paragraph 8.6.5 are listed on Schedule 5.1.5 attached
hereto.  Seller agrees to terminate the existing management agreement covering
the Property on or before Closing.

               5.1.6  No Default.  The execution and delivery of this
Agreement, and consummation of the transaction described in this Agreement, does
not and will not constitute a default under any contract, lease, or agreement to
which Seller is a party or by which Seller is bound.

               5.1.7  No Suits.  Except as set forth in the Disclosure
Schedule and except for personal injury or property damage actions for which
there is adequate insurance coverage and where the insurance carrier has
accepted the tender of the defense without reservation, to Seller's knowledge,
there is no action, suit or proceeding  pending or threatened against or
affecting the Property or any portion thereof, or relating to or arising out of
the ownership, management or operation of the Property, in any court or before
or by any federal, state, or municipal department, commission, board, bureau or
agency or other governmental instrumentality.

               5.1.8  Environmental Condition.  Each of the following
representations contained in this Paragraph 5.1.8 is wholly qualified and
limited by (a) any matters disclosed in 


                                          5
<PAGE>


any materials made available or delivered to Purchaser by Seller pursuant to
Paragraph 3 above or otherwise, (b) any matters disclosed in any environmental
reports or studies obtained by Purchaser, and (c) any other matters of which
Purchaser has actual knowledge. Subject to the foregoing, Seller represents: 

                    5.1.8.1   With the exception of items listed in the
Disclosure Schedule, and except (i) in amounts customarily found in office uses
and in the other uses for which the Property is suited and used and (ii) in
compliance with applicable law, to Seller's knowledge, Seller has not released,
generated or handled Hazardous Materials on the Property, and Seller has no
knowledge of any release, generation or handling of Hazardous Materials on the
Property by any tenants or the incorporation of Hazardous Materials by the
tenants in any improvements on the Property during the time Seller owned the
Property.  For the purposes hereof, "Hazardous Material"  means any substance,
chemical, waste or other material which is listed, defined or otherwise
identified as "hazardous" or "toxic" under any federal, state, local or
administrative agency ordinance or law, including, without limitation, the
Comprehensive Environmental Response, Compensation and Liability Act, 42 U.S.C.
Sections 9601 et seq. and the Resource Conservation and Recovery Act, 42 U.S.C.
Sections 6901 et seq., or any regulation, order, rule or requirement adopted
hereunder, as well as any formaldehyde, urea, polychlorinated biphenyls,
petroleum, petroleum product or by-product, crude oil, natural gas, natural gas
liquids, liquefied natural gas, or synthetic gas usable for fuel or mixture
thereof, radon, asbestos, and "source," "special nuclear" and "by-product"
material as defined in the Atomic Energy Act of 1985, 42 U.S.C. Sections 3011 et
seq. 

                    5.1.8.2   With the exception of items listed in the
Disclosure Schedule, to Seller's knowledge, Seller has not received any summons,
citation, directive, letter or other communication, written or oral, from the
United States Environmental Protection Agency or the State environmental
protection agency having jurisdiction over the Property.

               5.1.9  Options.  Seller has granted no options or rights of
first refusal to acquire any interest in the Property not set forth in the
Leases delivered to Purchaser or in documents of record disclosed in the title
commitment.

               5.1.10 Rent Roll.  To Seller's knowledge, the information set
forth on the rent roll attached hereto as Schedule 5.1.10  is true and accurate
in all material respects.

               5.1.11 Tenant Rights.  There are no termination, extension,
cancellation, or expansion rights under any occupancy arrangements with respect
to the Property except as contained in the Leases. 

               5.1.12 Leasing Commissions.  All leasing commissions, free
rent and tenant improvement allowances due and payable as of the date hereof by
Seller have been paid or will have been paid on or before Closing.  To Seller's
knowledge, the only current leases as to 



                                          6
<PAGE>


which commissions, free rent and tenant improvement allowances may become due in
the future are listed on Schedule 5.1.12, which future obligations shall be
expressly assumed by Purchaser.

               5.1.13 There are no employees of the Property or Seller who
will become employees of Purchaser or for which Purchaser shall be responsible
in any way.

          5.2  Representations and Warranties of Purchaser.  Purchaser hereby
represents and warrants to Seller that this Agreement has been, and all the
documents to be delivered by Purchaser to Seller will be, duly authorized,
executed, and are or will be legal, valid, and binding obligations of Purchaser,
are or will be enforceable in accordance with their respective terms, and do not
and will not at Closing violate any provisions of any agreement to which
Purchaser is subject.

          5.3  Limitations.  Each of the representations and warranties of
Seller contained in Paragraph 5.1: (i) is made as of the date of this Agreement;
(ii) will be deemed to be remade by Seller, and to be true in all material
respects, as of Closing, subject to other matters expressly permitted in this
Agreement or otherwise specifically approved in writing by Purchaser; and (iii)
will survive for a period of one (1) year after the Closing Date, as defined in
Paragraph 8.1.  Any claim that Purchaser may have at any time against Seller for
a breach of any such representation or warranty, whether known or unknown, which
is not asserted by notice from Purchaser to Seller within such six (6) month
period will not be valid or effective, and Seller will have no liability with
respect thereto.  Nor will Seller have any liability to Purchaser for a breach
of any representation or warranty unless the valid claims for all such breaches
collectively aggregate more than One Hundred Thousand Dollars ($100,000.00), in
which event the full amount of such valid claims shall be actionable, subject to
the limitation in Section 9.10. The continued accuracy in all material respects
of the aforesaid representations and warranties is a condition precedent to
Purchaser's obligation to close.  If any of said representations and warranties
is not correct in all material respects at the time the same is made or as of
Closing, and Seller had no knowledge of such inaccuracy when the representation
or warranty was made, or when remade at Closing, or if such warranty or
representation becomes inaccurate on or prior to Closing other than by reason of
Seller's default hereunder, Purchaser may, upon being notified of such
occurrence on or prior to Closing either (a) terminate this Agreement without
liability on the part of Seller or Purchaser, other than Purchaser's indemnity
contained in Paragraph 9.15 and the Deposit will be returned to Purchaser, or
(b) waive such matter and proceed to Closing, by notice to Seller given within
ten (10) days after Purchaser is notified of such occurrence, but in no event
later than Closing.  If Purchaser fails to give any notice within the required
time period, Purchaser will be deemed to have elected to waive such matter and
to proceed to Closing.  If any of said representations and warranties are not
correct in all material respects at the time the same is made or as of Closing,
and Seller had knowledge of such inaccuracy when the representation or warranty
was made, or, by its default hereunder caused the representation or warranty to
be inaccurate when remade at Closing, Purchaser may either (x) terminate this
Agreement subject to its obligations under Paragraph 9.15, receive a return of
the Deposit and recover from Seller all of Purchaser's actual, reasonable
out-of-pocket costs incurred in connection with its review of 



                                          7
<PAGE>


the Property or (y) waive the breach and its rights under clause (x) and proceed
to Closing, by notice to Seller given within ten (10) days after Purchaser is
notified of such occurrence, but in no event later than Closing.  If Purchaser
fails to give any notice within the required time period, Purchaser will be
deemed to have elected to waive such matter and to proceed to Closing.

          5.4  Condition of Property.  Except as expressly set forth in this
Agreement, Seller has not made and does not hereby make any representations,
warranties or other statements as to the condition of the Property and Purchaser
acknowledges that at Closing it is purchasing the Property on an "AS IS, WHERE
IS" basis and without relying on any representations and warranties of any kind
whatsoever, express or implied, from Seller, its agents or brokers as to any
matters concerning the Property.  Except as expressly set forth in this
Agreement, no representations or warranties have been made or are made and no
responsibility has been or is assumed by Seller or by any partner, officer,
person, firm, agent or representative acting or purporting to act on behalf of
Seller as to the condition or repair of the Property or the value, expense of
operation, or income potential thereof or as to any other fact or condition
which has or might affect the Property or the condition, repair, value, expense
of operation or income potential of the Property or any portion thereof.  The
parties agree that all understandings and agreements heretofore made between
them or their respective agents or representatives are merged in this Agreement
and the Schedules and Exhibits hereto annexed, which alone fully and completely
express their agreement, and that this Agreement has been entered into after
full investigation, or with the parties satisfied with the opportunity afforded
for investigation, neither party relying upon any statement or representation by
the other unless such statement or representation is specifically embodied in
this Agreement or the Exhibits annexed hereto.  Purchaser acknowledges that
Seller has requested Purchaser to inspect fully the Property and investigate all
matters relevant thereto and, with respect to the condition of the Property, to
rely solely upon the results of Purchaser's own inspections or other information
obtained or otherwise available to Purchaser, rather than any information that
may have been provided by Seller to Purchaser.  

     6.   Closing Conditions.  Purchaser's obligation to proceed to Closing is
conditioned upon Seller's performance of the following obligations and
satisfaction of the following conditions, in addition to all of its other
obligations and conditions contained in this Agreement, provided that Purchaser
may in its sole discretion elect to waive failure by Seller to perform any
particular obligation.

          6.1  Title Insurance.  The Title Insurer is prepared to issue a policy
of title insurance insuring Purchaser's interest in the Property being conveyed,
subject only to Acceptable Exceptions. 
     
          6.2  Estoppel Letters.  Seller has delivered to Purchaser not later
than the date of Closing, estoppel letters substantially in the form of Schedule
6.2 ("Required Estoppel Form") or in form otherwise reasonably acceptable to
Purchaser, prepared by Seller and 



                                          8
<PAGE>



addressed to Purchaser, from tenants occupying in the aggregate at least 75% of
the Property, measured by square footage.  All estoppel letters must be dated
not more than forty-five (45) days prior to the date of Closing.  An estoppel
letter form, even though not in the Required Estoppel Form, will be deemed
reasonably acceptable to Purchaser if said letter contains the following
information: confirming rent, security deposit, square footage  and termination
date; that no rent has been paid more than one month in advance; that the lease
is in full force and effect and that a true and correct copy of the lease with
all amendments and modifications is attached; and that all work to be performed
by Landlord has been performed and that the tenant has no knowledge of any
Landlord default.

               6.2.1  If Seller is unable to obtain the requisite estoppel
letters as described above, Seller may (but is not required to) substitute for
any unsigned estoppel letter from a tenant other than a Major Tenant an estoppel
letter in the Required Estoppel Form, which may be completed, executed and
delivered by Seller and warranted and represented by Seller, provided that such
substituted estoppel letters will not collectively represent in excess of 10% of
all of the tenants, measured by square footage.  Seller's representations and
warranties in the certificates will survive the Closing subject to the
limitations of Paragraph 5.3.  In the event that, following the Closing Date,
Seller or Purchaser obtains an estoppel letter complying with the requirements
of Paragraph 6.2 with respect to any lease for which Seller delivered a
substituted estoppel letter, Seller will deliver such estoppel letter to
Purchaser and, upon such delivery, Seller will be automatically released from
any liability or obligation under the substituted estoppel letter previously
delivered by Seller with respect to such lease.  Purchaser may (but shall not be
required to) accept a substituted estoppel letter as to a Major Tenant as well.

               6.2.2  If Seller is unable to obtain and deliver sufficient
tenant estoppel certificates as required under Paragraph 6.2, or if the letters
received under Paragraph 6.2 or substituted estoppels permitted under Paragraph
6.2.1 contain information or omissions unacceptable to Purchaser in its
reasonable discretion, then Seller will not be in default by reason thereof, but
Purchaser may, by notice given to Seller before the Closing, elect (i) to waive
said conditions and proceed with the Closing or (ii) to terminate this
Agreement, and receive a refund of the Deposit.  If Purchaser elects to
terminate this Agreement, neither party will have any further rights or
obligations hereunder except as provided in Paragraph 9.15.

          6.3  Representations and Warranties.  All of Seller's representations
and warranties made pursuant to Paragraph 5.1 remain true and correct in all
material respects.

          6.4  Seller Performance.  Seller has delivered all of the documents
and other items required pursuant to Paragraph 8.6 and has performed all other
covenants, undertakings and obligations required by this Agreement, to be
performed or complied with by Seller at or prior to Closing.

     7.   Other Agreements.  The obligations of Purchaser and Seller to close
hereunder shall also be conditioned upon the simultaneous closing of (a) the
purchase by Purchaser or an 



                                          9
<PAGE>


affiliate of Purchaser, of twelve industrial and office buildings and a parcel
of vacant land in King of Prussia Business Park, King of Prussia, Pennsylvania,
pursuant to that certain Agreement of Purchase and Sale of even date herewith
("KOP Agreement") between Purchaser, as purchaser, and RREEF USA Fund-I  ("KOP
Owner"), as seller, and (b) the purchase by Purchaser or an affiliate of
Purchaser, of the industrial building commonly known as 741 First Avenue, King
of Prussia, Pennsylvania, pursuant to that certain Agreement of Purchase and
Sale of even date herewith (the "741 Agreement"; the KOP Agreement and the
741Agreement collectively the "Other Agreements") between Purchaser, as
purchaser, and RREEF MidAmerica/East Fund-IV ("741 Owner"; the KOP Owner and the
741 Owner are collectively referred to as the "Other Owners"), as seller.  This
condition may be waived by the parties.  Without limiting the generality of the
foregoing, if Purchaser terminates this Agreement pursuant to Section 3 or
Section 4, the Other Owners shall have the right to terminate the Other
Agreements as well; or, if Purchaser terminates one or more of the Other
Agreements pursuant to Section 3 or Section 4 of the Other Agreements, Seller
shall have the right to terminate this Agreement as well.  A default by
Purchaser under one or more of the Other Agreements shall be deemed a Purchaser
default hereunder, and a default by an Other Owner under one or more of the
Other Agreements shall be deemed a Seller default hereunder.

     8.   Closing.

          8.1  Closing of Sale.  The purchase and sale contemplated herein shall
close (herein referred to as the "Closing") at the office of the Title Insurer,
or as otherwise mutually agreed, on a date selected by Seller, which date (the
"Closing Date") shall not be earlier than the date which is fifteen (15) days
after the expiration of the Review Period nor more than thirty (30) days after
expiration of the Review Period, time being of the essence.  At Closing, Seller
will deliver to Purchaser a Special Warranty Deed ("Deed") in the form of
Schedule 8.6.1 and other closing documents required hereunder and Purchaser will
cause payment of the Purchase Price to be made to Seller by wire transfer.  The
sale (payment of the Purchase Price and delivery of the Deed) may, at
Purchaser's option to be exercised by notice to Seller at least five (5) days
prior to the Closing Date, be closed through escrow with the Title Insurer in
accordance with the general provisions of the usual form of escrow agreement
used in similar transactions by such Title Insurer with special provisions
inserted (i) as may be required to conform with this Agreement and (ii) to close
on a so-called "New York Style" basis.

          8.2  Prorations; Adjustments.   The parties will prorate taxes,
rental, and other income, and operating or other expenses of the Property as of
12:01 a.m. on the date after Closing (i.e., Seller is entitled to the income and
responsible for the expenses of the day of Closing).  All income will be
prorated on the basis of income actually received by Seller, as opposed to
income which is due or for which Seller has rendered invoices but which has not
been paid (i.e., Seller will not be entitled to any credit for receivables, and
there will be no proration as to such receivables).  Any taxes or other expenses
of the Property for any period prior to Closing which are payable by tenants of
the Property subsequent to Closing (e.g., real estate taxes paid in arrears and
not yet billed to tenants), will reduce the credit to Purchaser for such items
(i.e., no 




                                          10
<PAGE>



credit from Seller for pass-through items for which Purchaser will later collect
from the tenants).  To the extent that the taxes to be prorated are not known
with certainty, such proration will be based upon the most recent tax bill or
county estimate, to be re-prorated upon issuance of final bills.  Seller also
agrees to give Purchaser a credit against the Purchase Price for all cash
security deposits required to be held pursuant to the Leases (less portions
thereof applied by Seller to tenant defaults and not subsequently restored by
the tenant in question) and all interest due thereon and shall assign to
Purchaser any other tenant deposits held by Seller.  Purchaser will pay amounts
subsequently received by it from tenants constituting base rent, capital
reimbursements or other income due from tenants and attributable to Seller's
period of ownership, but not collected as of the date of Closing, to Seller
promptly upon receipt; provided that amounts received from tenants by Purchaser
will be first applied to current charges, and the balance will be applied to
payments due to Seller.  Notwithstanding the foregoing, Seller shall expressly
reserve the right to seek to collect, directly from the tenants after Closing
and with Purchaser's cooperation, any delinquencies and other amounts
attributable to Seller's period of ownership, but not collected as of the date
of Closing.  To the extent Seller has received amounts from tenants for real
estate taxes and 1997 and 1998 operating expenses in excess of amounts paid by
Seller with respect to such expenses, Seller will credit such excess to
Purchaser at Closing, and Seller will provide adequate backup information in
connection with such credit. On or after the Closing, Seller will have no
further obligations with respect to any Leases or other agreements affecting the
Property, including, without limitation, tenant improvement work, leasing
commissions and free rent.

               8.2.1  Seller and Purchaser hereby agree to use their
reasonable efforts to calculate prorations (including real estate tax
prorations) so as to permit settlement thereof on the Closing Date, provided,
however, that if any of such prorations cannot be calculated accurately on the
Closing Date, then the same will be calculated as soon as reasonably practicable
after the Closing Date, but in no event later than the later to occur of (i)
thirty (30) days after Seller receives its final cost certification for the year
in which Closing occurs, or (ii) March 31 of the year following the year in
which Closing occurs, and either party owing the other party a sum of money
based on such subsequent proration(s) shall promptly pay said sum to the other
party, together with interest thereon at the rate of two percent (2%) per annum
over the "prime rate" (as announced from time to time in the Wall Street
Journal) from the Closing Date to the date of payment if payment is not made
within thirty (30) days after delivery of a bill therefor together with
reasonable back-up documentation.  This obligation of the parties will survive
Closing.

          8.3  Proration of Service Charges.  To the extent Seller, as opposed
to tenants, is responsible for payment of utility charges, Seller will attempt
to have utility meters read as of the Closing Date.  To the extent that this is
not possible and to the extent that any other obligation for continuing services
is incurred, and statements are rendered for such services covering periods both
before and after the Closing Date, the amount will be adjusted between the
parties as of the Closing Date on a per-diem basis.  Seller will forward any
such statements which it receives to Purchaser and Purchaser will pay the same. 
Seller will remit to Purchaser its proportionate share immediately upon demand.


                                          11
<PAGE>



          8.4  Closing Costs.  Purchaser agrees to pay (i) the Title Insurer's
escrow and/or closing fees (including any payment to the closing officer of the
Title Insurer as may be the local custom at the Closing), (ii) the cost of the
title commitment and basic policy and endorsements, if any, required to meet
Seller's obligations hereunder and the cost of any endorsements to the title
policy required by Purchaser, including extended coverage, (iii) all recording
fees and taxes with respect to the Deed, (iv) all costs of Purchaser's physical
inspections of the Property (environmental, engineering) and other due diligence
activities; (v) all costs of survey, including fees and charges of Gannett
Fleming Associates (originally engaged by Seller); (vi) cancellation charges, if
applicable, to Coventry Abstract (originally engaged by Seller); and (vii)
one-half (1/2) of applicable transfer taxes.  Seller agrees to pay (i) all
recording fees with respect to clearing Seller's title, and (ii) one-half (1/2)
of applicable transfer taxes.  Except as otherwise provided in Paragraph 9.9,
each party is responsible for its own attorneys' and other professional fees. 
All other closing costs shall be allocated in accordance with the prevailing
local custom.

          8.5  Possession.  Subject to the rights of tenants pursuant to Leases
delivered to Purchaser, Seller will deliver possession of the Property and of
any conveyed personal property to the Purchaser on the date of Closing and
Seller will thereupon deliver to Purchaser the originals of all Leases, all
correspondence with tenants, tenant/lease files, operating statements, plans and
specifications, supplies and advertising materials, booklets, keys, and other
items used in connection with operation of the Property.

          8.6  Seller's Closing Documents.  As part of the Closing, Seller will
deliver to Purchaser:  

               8.6.1  the Deed, in the form of Schedule 8.6.1

               8.6.2  an affidavit in customary form that Seller is not a
foreign person within the meaning of Section 1445(e) of the Internal Revenue
Code of 1986, in the form of Schedule 8.6.2; 

               8.6.3  such affidavits as are customarily required by Title
Insurer in connection with issuance of the owner's basic title insurance policy,
including a mechanics' lien and judgment affidavit; 

               8.6.4  an assignment of the Leases in the form of Schedule
8.6.4 ("Lease Assignment"); 

               8.6.5  an assignment of contracts and warranties in the form
of Schedule 8.6.5 ("Contracts Assignment"), assigning to Purchaser all contracts
listed on Schedule 5.1.5, other than those designated by Purchaser for
termination by notice to Seller not less than thirty (30) days prior to Closing;


                                          12
<PAGE>


               8.6.6  an assignment of intangibles in the form of Schedule
8.6.6 ("Intangibles Assignment");

               8.6.7  letters, in form to be supplied by Purchaser, to the
tenants at the Property,  instructing the tenants to pay rent to Purchaser and
to recognize Purchaser as landlord under their Leases; 

               8.6.8  a bill of sale conveying all personal property of
Seller, if any, located at the Property and used in connection with the
maintenance or operation thereof (specifically excluding furniture, fixtures and
equipment owned by RREEF Management Company and located in the RREEF Management
Company office), in the form of Schedule 8.6.8; 

               8.6.9  a rent roll, certified by Seller as being true and
correct, to Seller's knowledge, as of the Closing Date, in the form previously
delivered to Purchaser;

               8.6.10 a "bring down certificate" stating that Seller's
representations and warranties are true and correct as of the Closing Date, in
the form of Schedule 8.6.10;

               8.6.11 estoppel certificates as required by Paragraph 6.2
herein; and 

               8.6.12 all other documents, instruments or writings which may
be reasonably required to consummate the transactions contemplated herein.

          8.7  Purchaser's Closing Documents.  As part of the Closing, Purchaser
will deliver to Seller:  

               8.7.1  good federal funds in an amount equal to the Purchase
Price, less the Deposit and interest thereon and plus or minus prorations as
provided herein and plus funds sufficient to pay Purchaser's closing costs
hereunder; 

               8.7.2  such affidavits as are customarily required by Title
Insurer in connection with issuance of the owner's title insurance policy; 

               8.7.3  executed counterpart of the Lease Assignment;

               8.7.4  executed counterpart of the Contracts Assignment;

               8.7.5  executed counterpart of the Intangibles Assignment;

               8.7.6  all other documents, instruments or writings which may
be reasonably required to consummate the transactions contemplated herein.

                                          13
<PAGE>



          8.8  Joint Deliveries.  At the Closing, Seller and Purchaser will
execute and deliver to each other the following documents in proper form:

               8.8.1  Closing Statement;

               8.8.2  City, county and state transfer tax declarations or
similar instruments; and 

               8.8.3  All other documents, instruments or writings which may
be reasonably required to consummate the transactions contemplated herein.

     9.   Miscellaneous.

          9.1  Modifications.  This Agreement can be amended only in writing
signed by both of the parties.

          9.2  Casualty and Condemnation.  Seller agrees to keep its customary
replacement cost insurance covering the Property in effect until the Closing. 
If between the Effective Date and the Closing the improvements on the Property
are destroyed or damaged to the extent that repairs cost in excess of $250,000
in the estimate of an architect or contractor selected by Seller and reasonably
acceptable to Purchaser, or if condemnation proceedings are commenced against
the Property, Purchaser may (i) terminate this Agreement or (ii) elect to accept
the Property in its then condition, in which event Seller will pay or assign to
Purchase at Closing all proceeds of insurance (plus the applicable deductible)
or condemnation awards payable to Seller by reason of such damage or
condemnation.  In the event Purchaser makes neither election by the earlier of
(a) Closing or (b) ten (10) days after being advised of such casualty or
condemnation, Purchaser will be deemed to have elected to accept the Property in
its then condition.  In the event of any other damage to the Property, Seller
may either repair the damage or give Purchaser a reduction in the Purchase Price
equal to the cost of repairing such damage, as certified by an architect or
contractor selected by Seller and reasonably acceptable to Purchaser.  In the
event of any damage where Purchaser does not have the right to terminate and
Seller elects to repair such damage, the Closing Date shall be delayed for the
number of days required to repair the damage, which Seller agrees to do in
accordance with all Laws and in a good and workmanlike manner.    

          9.3  Time of Essence.  Time (including, without limitation, the date
specified as the Closing Date) is of the essence of this Agreement.

          9.4  Notices.  All notices required or permitted hereunder must be in
writing and shall be served on the parties at the following address:

          If to Purchaser:         Brandywine Realty Trust






                                          14
<PAGE>


                                   Newtown Square Corporate Campus
                                   16 Campus Blvd.
                                   Suite 150
                                   Newtown Square, PA 19073
                                   Attn: Gerard H. Sweeney, President & CEO
                                   Brad A. Molotsky, General Counsel
                                   Facsimile: (610-325-5622)  

          If to Seller:            RREEF MidAmerica East-V Six, Inc.
                                   c/o The RREEF Funds
                                   875 N. Michigan Avenue
                                   Suite 4100
                                   Chicago, IL 60611
                                   Attn: Mr. John Turney & Ms. Pamela Boneham
                                   Facsimile: (312) 266-9346
          
          with a copy to:          RREEF MidAmerica East-V Six, Inc.
                                   c/o The RREEF Funds
                                   650 Park Avenue
                                   Suite 210
                                   King of Prussia, PA 19406
                                   Attn: Ms. Barbara Gillentine
                                   Facsimile: (610) 337-2308
          
          and a copy to:           D'Ancona & Pflaum
                                   30 North LaSalle Street
                                   Suite 2900
                                   Chicago, Illinois  60602
                                   Attn: Lawrence J. Moss
                                   Facsimile: (312) 580-0923

Any such notices may be sent by (a) certified mail, return receipt requested, in
which case notice will be deemed delivered three (3) business days after
deposit, postage prepaid in the U.S. mail or (b) a nationally recognized
overnight courier, in which case notice will be deemed delivered one business
day after deposit with such courier or (c) facsimile transmission, in which case
notice will be deemed delivered upon electronic verification that transmission
to recipient was completed, provided that notices sent by facsimile transmission
on a day other than a business day, or before 9:00 a.m. or after 5:00 p.m.
recipient's time on a business day, shall be deemed given on the first business
day following the date of transmission or (d) personal delivery.  The above
addresses and facsimile numbers may be changed by notice to the other party;
provided that no notice of a change of address or facsimile number will be
effective until actual receipt of such notice.


                                          15
<PAGE>



          9.5  Parties Bound.  Neither party may assign this Agreement without
the prior written consent of the other, and any such prohibited assignment shall
be void; provided that Purchaser may assign this Agreement without Seller's
consent to an Affiliate; provided that the assignee is not a party-in-interest
as described in Paragraph 9.14.  Subject to the foregoing, this Agreement is
binding upon and inure to the benefit of the respective legal representatives,
successors, assigns, heirs, and devisees of the parties.  For the purposes of
this Paragraph, the term "Affiliate" means (a) an entity that directly or
indirectly controls, is controlled by or is under common control with the
Purchaser or (b) an entity at least a majority of whose economic interest is
owned by Purchaser; and the term "control" means the power to direct the
management of such entity through voting rights, ownership or contractual
obligations.

          9.6  Governing Law.  The performance and interpretation of this
Agreement is controlled by the law of the Commonwealth of Pennsylvania.

          9.7  Continuation Until Closing; Leasing. 

               9.7.1  Between the Effective Date and the Closing, Seller
agrees to keep and perform all of the obligations to be performed by landlord
under any Leases and Laws.  Seller agrees to operate the Property in the same
manner as before the making of this Agreement, the same as though Seller were
retaining the Property.  Seller agrees not to convey the Property, nor to grant
any liens or easements with respect thereto.

               9.7.2  Seller shall not permit or consent to any new leases,
amendments, extensions, renewals (other than pursuant to tenant renewal options,
if any) or subleases without first submitting them to Purchaser for Purchaser's
approval on an approval form in the form attached hereto as Schedule 9.7.2,
which approval shall not be unreasonably withheld.  Purchaser shall have three
(3) business days to notify Seller of its approval of such leases, amendments,
extensions, renewals or subleases, and in the event that Purchaser does not so
notify Seller, the leases, amendments, extensions, renewals or  subleases, as
the case may be, shall be deemed approved.  

               9.7.3  With respect to any new lease or lease modification
entered into by Seller after December 18, 1997 and approved by Purchaser, by the
terms of which Seller obligates itself to perform or performs or pays or
contracts for any tenant improvement work or additional landlord work required
pursuant to such lease, or pays or contracts for any leasing commissions or
grants any free rent period or other financial concessions, then such expenses
and/or free rent or other concessions, and all other third-party costs incurred
(including attorneys' fees) in connection with such lease, will be a credit to
Seller at Closing to the extent Seller paid such amounts prior to Closing;
otherwise Purchaser agrees to assume liability for the payment and performance
of such obligations in accordance with the terms thereof.

          9.8  Brokers.  Seller and Purchaser each (i) represents and warrants
to the other that it has not dealt with any broker or finder in connection with
the transaction contemplated by 


                                          16
<PAGE>


this Agreement other than the parties, if any, to be paid a commission as
specified in Paragraph 9.11, and (ii) agrees to defend, indemnify and hold the
other harmless from and against any losses, damages, costs, or expenses
(including attorneys' fees) incurred by such other party due to a breach of the
foregoing warranty by the indemnifying party.

          9.9  Attorneys' Fees.  Notwithstanding any limitation on remedies or
amounts recoverable set forth elsewhere herein, if any action is brought by
either party against the other party, the party in whose favor final judgment is
entered will be entitled to recover court costs incurred and reasonable
attorneys' fees at trial, upon appeal and on any petition for review.

          9.10 Remedies for Non-Performance.  Purchaser's remedies regarding
breach of warranty or representation by Seller are governed by Paragraph 5.3. 
In the event of any other default by Seller hereunder, Purchaser may, as its
sole and exclusive remedy, either (i) terminate this Agreement and seek damages,
subject to performance of Purchaser's indemnities set forth in Paragraph 9.15,
and receive back the Deposit or (ii) seek specific performance.  If said sale is
not consummated because of a default under this Agreement on the part of
Purchaser, the Deposit will be paid to and retained by Seller as Seller's sole
and exclusive remedy.  Seller and Purchaser acknowledge that the Deposit is a
reasonable forecast of just compensation for the harm that could be caused by
Purchaser's default and that the harm suffered by Seller is difficult or
impossible to accurately ascertain or predict.  NOTWITHSTANDING ANY OTHER
PROVISION OF THIS AGREEMENT TO THE CONTRARY, SELLER'S TOTAL LIABILITY FOR
DAMAGES FOR BREACH OF THE COVENANTS, AGREEMENTS, WARRANTIES AND REPRESENTATIONS
UNDER THIS AGREEMENT AND THE OTHER AGREEMENTS, COLLECTIVELY, SHALL NEVER EXCEED
TWO MILLION DOLLARS ($2,000,000.00), AND IN NO EVENT SHALL SELLER BE LIABLE FOR
SPECIAL, EXEMPLARY, CONSEQUENTIAL OR PUNITIVE DAMAGES.

          9.11 Brokers Commission.  Seller agrees to pay the brokerage
commission due The Flynn Company pursuant to a separate agreement.

          9.12 Survival of Covenants.  All covenants hereunder which, by their
terms, are intended to survive Closing will survive Closing hereunder.

          9.13 Seller's Investment Committee Approval. This condition has been
satisfied.

          9.14 ERISA.  Purchaser represents and warrants to Seller that none of
Purchaser's assets are "plan assets," (as that term is defined by 29 CFR Section
2510.3-101) because all plans that are subject to the provisions of the Employee
Retirement Income Security Act of 1974, as amended, and which have invested in
Purchaser hold only "equity interests," (as that term is defined by 29 CFR
Section 2510.3-101(b)(1)) that are "publicly-offered securities," (as that term
is defined by 29 CFR Section 2510.3-101(b)(2)).  Purchaser further represents
and warrants to Seller that 


                                          17
<PAGE>


it is not any one of the types of entities listed in 29 CFR Section
2510.3-101(h), the character of which would identify its assets as "plan
assets."

          9.15 Entry and Indemnity.  In connection with any entry by Purchaser,
or its agents, employees or contractors onto the Property, Purchaser shall give
Seller reasonable advance notice of such entry and shall conduct such entry and
any inspections in connection therewith so as to minimize, to the greatest
extent possible, interference with Seller's business and the business of
Seller's tenants and otherwise in a manner reasonably acceptable to Seller. 
Without limiting the foregoing, prior to any entry to perform any on-site
testing, Purchaser shall give Seller notice thereof, including the identity of
the company or persons who will perform such testing and the proposed scope of
the testing.  Seller shall approve or disapprove the scope and methodology of
such proposed testing within three (3) business days after receipt of such
notice, such approval to be within the sole and unfettered discretion of Seller;
Seller's failure to notify Purchaser of its approval or disapproval shall be
deemed to be Seller's disapproval thereof.  If Purchaser or its agents,
employees or contractors take any sample from the Property in connection with
any such approved testing, upon Seller's request, Purchaser shall provide to
Seller a portion of such sample being tested to allow Seller, if it so chooses,
to perform its own testing.  Seller or its representative may be present to
observe any testing or other inspection performed on the Property.  Upon
Seller's request, Purchaser shall promptly deliver to Seller copies of any
reports relating to any testing or other inspection of the Property performed by
Purchaser or its agents, employees or contractors.  Purchaser shall maintain,
and shall assure that its contractors maintain, public liability and property
damage insurance in amounts and in form and substance adequate to insure against
all liability of Purchaser, its agents, employees or contractors, arising out of
any entry or inspections of the Property pursuant to the provisions hereof, and
Purchaser shall provide Seller with evidence of such insurance coverage upon
request by Seller.  Purchaser shall indemnify, defend and hold Seller harmless
from and against any costs, damages, liabilities, losses, expenses, liens or
claims (including, without limitation, reasonable attorney's fees) arising out
of or relating to any entry on the Property by Purchaser, its agents, employees
or contractors in the course of performing the inspections, testings or
inquiries provided for in this Agreement, including without limitation damage to
the Property or release of hazardous substances or materials onto the Property,
excluding, however, any costs incurred by Seller in supervising Purchaser's
testing.  The foregoing indemnity shall survive beyond the Closing, or if the
sale is not consummated, beyond the termination of this Agreement. 

          9.16 Release.  Except to the extent of the representations and
warranties of Seller expressly set forth in this Agreement, and except to the
extent of a breach by Seller of applicable laws, but otherwise notwithstanding
any other provision of this Agreement to the contrary, Purchaser, on behalf of
itself and its successors and assigns, waives its right to recover from, and
forever releases and discharges, Seller, Seller's affiliates, Seller's
investment manager, the partners, trustees, shareholders, directors, officers,
employees and agents of each of them, and their respective heirs, successors,
personal representatives and assigns (collectively, the "Seller Related
Parties"), from any and all demands, claims, legal or administrative
proceedings, losses, liabilities, damages, penalties, fines, liens, judgments,
costs or expenses whatsoever (including, 


                                          18
<PAGE>


without limitation, attorneys' fees and costs), whether direct or indirect,
known or unknown, foreseen or unforeseen, which may arise on account of or in
any way be connected with the physical condition of the Property or any law or
regulation applicable thereto, including, without limitation, the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, as amended (42
U.S.C. Sections 9601 et seq.), the Resources Conservation and Recovery Act of
1976 (42 U.S.C. Section 6901 et seq.), the Clean Water Act (33 U.S.C. Section
466 et seq.), the Safe Drinking Water Act (14 U.S.C. Sections 1401-1450), the
Hazardous Materials Transportation Act (49 U.S.C. Section 1801 et seq.), and the
Toxic Substance Control Act (15 U.S.C. Sections 2601-2629) 

          9.17 Confidential Information.  The parties acknowledge that the
transaction described herein is of a confidential nature and shall not be
disclosed except to consultants, investors,  advisors, and affiliates, or as
required by law.  No party will make any public disclosure of the specific terms
of this Agreement, except as required by law.  Without limiting the generality
of the foregoing, any press release or other public disclosure regarding this
Agreement or the transactions contemplated herein, and the wording of same, must
be approved in advance by both parties.  In connection with the negotiation of
this Agreement and the preparation for the consummation of the transactions
contemplated hereby, each party acknowledges that it will have access to
confidential information relating to the other party.  Each party shall treat
such information as confidential, preserve the confidentiality thereof, and not
duplicate or use such information, except to advisors, consultants, investors
and affiliates in connection with the transactions contemplated hereby.  In the
event of the termination of this Agreement for any reason whatsoever, Purchaser
will return to Seller, at Seller's request, all documents, work papers, and
other material (including all copies thereof) obtained from Seller in connection
with the transactions contemplated hereby, and each party shall use its best
efforts, including instructing its employees and others who have had access to
such information, to keep confidential and not to use any such information.  The
provisions of this Paragraph 9.17 will survive the Closing or, if the purchase
and sale is not consummated, any termination of this Agreement.  

          9.18 Calculation of Time Periods.  Unless otherwise specified, in
computing any period of time described herein, the day of the act or event,
after which the designated period of time begins to run, is not to be included
and the last day of the period so computed is to be included, unless such last
day is a Saturday, Sunday or legal holiday, in which event the period shall run
until the end of the next day which is neither a Saturday, Sunday, or legal
holiday (i.e., a day on which federally chartered banks are not open for
business in Chicago, Illinois).  The last day of any period of time described
herein shall be deemed to end at 5 p.m. Chicago, Illinois time on the last day
of such period of time. All days other than Saturdays, Sundays and legal
holidays in which national banks are closed in Chicago, Illinois are business
days hereunder.

          9.19 Entire Agreement.  This Agreement and any other document to be
furnished pursuant to the provisions hereof embody the entire agreement and
understanding of the parties hereto as to the subject matter contained herein. 
There are no restrictions, promises, 



                                          19
<PAGE>


representations, warranties, covenants, or undertakings other than those
expressly set forth or referred to in such documents.  This Agreement and such
documents supersede all prior agreements and understandings among the parties
with respect to the subject matter hereof

          9.20 Severability.  Any term or provision of this Agreement that is
invalid or unenforceable in any jurisdiction will, as to such jurisdiction, be
ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement, or affecting the validity or enforceability of any of the terms or
provisions of this Agreement.

          9.21 Facsimile Signatures.  Executed facsimile copies of this
Agreement or any amendments hereto shall be binding upon the parties, and
facsimile signatures appearing hereon or on any amendments hereto shall be
deemed to be original signatures.

          9.22 Further Assurances.  In addition to the acts and deeds recited
herein and contemplated to be performed, executed and/or delivered by Seller to
Purchaser at Closing, Seller agrees to perform, execute and deliver, but without
any obligation to incur any additional liability or expense, on or after the
Closing any further deliveries and assurances as may be reasonably necessary to
consummate the transactions contemplated hereby or to further perfect the
conveyance, transfer and assignment of the Property to Purchaser.

          9.23 Offer.  Execution and delivery of this Agreement by Purchaser
constitutes an offer to purchase the Property on the terms contained herein. 
Delivery by Seller of a copy of  the fully executed Agreement by facsimile
transmission on or before the Expiration Date, followed by a manually signed
copy thereof delivered the next business day after transmission of such copy,
shall constitute acceptance by Seller as of the date of the facsimile
transmission. The date on which Seller delivers a fully executed copy of this
Agreement to Purchaser, or delivers a copy by facsimile transmission followed by
a manually signed copy as provided in the preceding sentence is referred to
herein as the "Effective Date."

          9.24 Seller Exculpation Clause.  The obligations of Seller contained
herein are intended to be binding only on the property of the trust party to
this Agreement of Purchase and Sale and shall not be personally binding upon,
nor shall any resort be had to the private properties of, any of the trustees,
investment managers, any general partners thereof, or any employees or agents of
the trustees or investment managers.  All documents to be executed by Seller
shall also contain the foregoing exculpation.




                                          20
<PAGE>


          9.25 Purchaser Exculpation Clause.  No recourse shall be had for any
obligation of Brandywine Operating Partnership, L.P. and Brandywine Realty Trust
under this Agreement or under any document executed in connection herewith or
pursuant hereto, or for any claim based thereon or otherwise in respect thereof,
against any past, present or future trustee, shareholder, officer or employee of
Brandywine Operating Partnership, L.P. or Brandywine Realty Trust, whether by
virtue of any statute or rule of law, or by the enforcement of any assessment or
penalty or otherwise, all such liability being expressly waived and released by
the Seller and all parties claiming by, through or under Seller.

          9.26 SEC Reporting (8-K) Requirements.  For the period of time
commencing on the date hereof and continuing through the first anniversary of
the Closing Date, and without limitation of other document production otherwise
required of Seller hereunder, Seller shall, from time to time, upon reasonable
advance written notice from Purchaser, provide Purchaser and its
representatives, with (a) access to all financial information pertaining to the
period of Seller's ownership and operation of the Property, which information is
relevant and reasonably necessary, in the opinion of Purchaser's outside, third
party accountants (the "Accountants"), to enable Purchaser and its Accountants
to prepare financial statements in compliance with any or all of (i) Rule 3-05
or 3-15 of Regulation S-X of the Securities and Exchange Commission (the
"Commission"), as applicable; (ii) any other rule issued by the Commission and
applicable to Purchaser; and (iii) any registration statement, report or
disclosure statement filed with the Commission, by, or on behalf of Purchaser;
and (b) a representation letter, signed by the



                                          21
<PAGE>


individual(s) responsible for Seller's financial reporting, substantially in the
form of Schedule 9.26 attached hereto, which representation letter may be
required by the Accountants in order to render an opinion concerning Seller's
financial statements.


     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the dates set forth below.

SELLER:                                         PURCHASER:

RREEF MIDAMERICA EAST-V SIX, INC.               BRANDYWINE OPERATING    
                                                PARTNERSHIP, L.P.


By:  RREEF America L.L.C., its
     investment advisor                        By: Brandywine Realty Trust, its
                                                   authorized general partner



By: ---------------------------                By: ---------------------------
     Authorized Representative                     Gerard H. Sweeney
                                                   President and Chief Executive
                                                   Officer

Dated:--------------------------              Dated:---------------------------



                                          22
<PAGE>

                            List of Schedules and Exhibits

Schedules

2.1         Escrow Instructions
5.1         Disclosure Schedule
5.1.5       Service Contracts
5.1.10      Rent Roll
5.1.12      Future Leasing Commissions, Tenant Improvements and
             Free Rent
6.2         Form of Estoppel Letter
8.6.1       Form of Deed
8.6.2       FIRPTA Certificate
8.6.4       Assignment and Assumption of Leases
8.6.5       Assignment and Assumption of Contracts and Warranties
8.6.6       Assignment of Intangibles
8.6.8       Bill of Sale
8.6.10      Bring-Down Certificate
9.26        SEC Compliance Representation Letter

Exhibits

A           Legal Description of Property
A-1         Descriptive List of the Property 


                                          23
<PAGE>

                                     Schedule 2.1

                          EARNEST MONEY ESCROW INSTRUCTIONS


               (earnest money escrow instructions previously executed)

<PAGE>

                                     Schedule 5.1

                                 DISCLOSURE SCHEDULE

     1.   A 1996 Environmental Audits was  prepared by ATC Environmental, 
Inc. for the Property.  This Audit has been made available to Purchaser for 
inspection and copying, and, each of the Seller warranties of Section 5.1.8 
and its subparagraphs are qualified and limited by any matters disclosed in 
such Audit.

     2.   Possible building code violations disclosed by Seller to Purchaser 
by letter dated January 21, 1997 from Lawrence J. Moss to Brad A. Molotsky.

     3.   Bell Atlantic has requested an easement for laying underground 
telephone lines, as disclosed by Seller to Purchaser by letter dated January 
21, 1997 from Lawrence J. Moss to Brad A. Molotsky.

<PAGE>

                                    Schedule 5.1.5

                                  Service Contracts

A.T. BUILDERS
CROWN CONTRACTORS, INC
ELDREDGE, INC.
OLIVER SPRINKLER CO.
DOUGLAS SCOTT LANDSCAPING
PHOENIX MECHANICAL INC.
WAYMAN FIRE PROTECTION

<PAGE>

                                   Schedule 5.1.10

                                      Rent Roll

<PAGE>

                                   Schedule 5.1.12

            Future Leasing Commissions, Tenant Improvements and Free Rent


                                        (none)

<PAGE>

                                     Schedule 6.2

                                TENANT ESTOPPEL LETTER

                                                            ________ __, 1998


Brandywine Realty Trust
Newtown Square Corporate Campus
16 Campus Boulevard
Newtown Square, PA  19073

Attention:  Gerard H. Sweeney, 
     President and Chief Executive Officer


NationsBank, N.A.,
Real Estate Banking
8300 Greensboro Drive, Suite 300
McLean, VA 22102

Attention: Gary P.F. Carr

               Re:  Lease from ________, for Suite ____, located at 
                    [BUILDING ADDRESS]  
                    [CITY/TOWNSHIP], Pennsylvania (the "Property")

To Whom it May Concern:

     The undersigned is the holder of the tenant's interest under the lease 
described on Exhibit A attached hereto (the "Lease") demising a portion of 
the Property (the "Leased Premises").  We understand that Brandywine Realty 
Trust, its assignee or nominee ("Brandywine") intends to acquire the 
Property, and that NationsBank, N.A., as Agent for the parties listed on 
Schedule 1 attached hereto ("Lender") may be the holder of a first mortgage 
on the Property, and that Brandywine and Lender require this certification 
from us.

     Accordingly, we hereby certify to Brandywine and Lender as follows:

     1.   The Lease is in full force and effect and has not been modified, 
amended or supplemented in any way, except as follows (Insert dates of all 
modifications, amendments, or supplements; if none, write "None"):

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

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

<PAGE>

     2.   There are no other representations, warranties, agreements, 
concessions, commitments, or other understandings between the undersigned and 
the Landlord regarding the Property other than as set forth in the Lease or 
paragraph 1 above.

     3.   The landlord under the Lease has completed and delivered, and the 
undersigned has accepted, the Leased Premises in the condition required by 
the Lease and the term of the Lease commenced on _________.  The Leased 
Premises consists of approximately ___________ square feet.  The undersigned 
has taken possession of and is occupying the Leased Premises on a rent-paying 
basis and the monthly base rent payable thereunder is $_________, payable in 
advance.  All improvements and work required under the Lease to be made by 
the landlord thereunder and all facilities required under the Lease to be 
furnished to the Leased Premises have been completed to the satisfaction of 
the undersigned, except as follows (Insert description of any improvements 
and work to be completed by the landlord under the Lease; if none, write 
"None"): 
        ---------------------------------------------------------------------

     4.   The fixed expiration date set forth in the Lease, excluding 
renewals and extensions, is ________________.  The undersigned neither has 
any option or right to purchase the Property or any portion thereof nor does 
the undersigned have any right or option to terminate the Lease or any of its 
obligations thereunder in advance of the scheduled termination date of the 
Lease as noted above, except as follows (Insert description of any purchase 
rights or options, and/or any early termination rights; if none, write 
"None"):
        ---------------------------------------------------------------------

     5.   All rents, additional rents and other sums due and payable under 
the Lease have been paid in full and no rents, additional rents or other sums 
payable under the Lease have been paid for more than one (1) month in advance 
of the due dates thereof.

     6.   The landlord under the Lease is not in default under any of the 
requirements, provisions, terms, conditions or covenants of the Lease to be 
performed or complied with by the landlord under the Lease, and no event has 
occurred or situation exists which would, with the passage of time and/or the 
giving of notice, constitute a default or an event of default by the landlord 
under the Lease.

     7.   The undersigned is not in default under any of the requirements, 
provisions, terms, conditions, or covenants of the Lease to be performed or 
complied with by the undersigned, and no event has occurred or situation 
exists which would, with the passage of time and/or the giving of notice, 
constitute a default or an event of default by the undersigned under the 
Lease.

                                          2

<PAGE>

     8.   The undersigned has received no notice from any governmental 
authority or other person or party claiming a violation of, or requiring 
compliance with, any Federal, State or local statute, ordinance, rule, 
regulation or other requirement of law, for environmental contamination at 
the Leased Premises, to the best knowledge of the undersigned no hazardous, 
toxic or polluting substances or wastes have been generated, treated, 
manufactured, stored, refined, used, handled, transported, released, spilled, 
disposed of or deposited by Tenant on, in or under the Leased Premises.

     9.   Neither the undersigned nor the landlord under the Lease has 
commenced any action or given or received any notice for the purpose of 
terminating the Lease.

     10.  There are no existing defenses, offsets, claims, or credits against 
the payment of rent or the performance of the undersigned's obligations under 
the Lease.

     11.  The undersigned has paid to the landlord under the Lease a security 
deposit of $____________. 

                                       Very truly yours,


                                       By:
                                          --------------------------------
                                          Name:
                                          Title:

                                          3
<PAGE>

                                      Exhibit A
                               (Description of Lease) 

                                          4

<PAGE>

                                    Schedule 8.6.1

                                     Form of Deed

SPECIAL WARRANTY DEED:

THIS INDENTURE made this ____ day of ___________, 1998,

BETWEEN   RREEF MIDAMERICA EAST-V SIX, INC., A Delaware corporation
                    (hereinafter called the Grantor/s), of the one part and

          ---------------------
                    (hereinafter called the Grantee/s), of the second part,

WITNESSETH That in consideration of Ten and No/100 Dollars ($10.00) in hand 
paid, the receipt whereof is hereby acknowledged, the said Grantor/s do/does 
hereby grant, bargain, sell and convey unto the said Grantee/s, his/her/their 
successors and /or assigns,

ALL THAT CERTAIN real estate, situated in the County of Montgomery and 
Commonwealth of Pennsylvania known and described on the attached Exhibit A 
"Legal Description," attached hereto an hereby made a part hereof.

TOGETHER with all and singular the buildings, improvements, ways, streets, 
alleys, driveways, passages, waters, water-courses, rights, liberties, 
privileges, hereditaments and appurtenances whatsoever unto the hereby 
granted premises belonging, or in anywise appertaining, and the reversions 
and remainders, rents, issues and profits thereof; and all the estate, right, 
title, interest, use, trust, property, possession, claim and demand 
whatsoever of Grantor as well at law as in equity, of, in, and to the same.

TO HAVE AND TO HOLD the said lot or piece of ground described with the 
buildings and improvements thereon erected, hereditaments and premises hereby 
granted, or mentioned and intended so to be, with the appurtenances unto the 
said Grantee, and its successors and assigns to and for the only proper use 
and behoof of the said Grantee, and its successors and assigns, forever.

AND the said Grantor/s do/does hereby covenant to and with the said Grantee/s 
that he/she/they, the said Grantor/s, his/her/their successors and/or 
assigns, SHALL AND WILL warrant specially and forever defend the herein above 
described premises, with the hereditaments and appurtenances, unto the said 
Grantor/s and against every other person lawfully claiming or who shall 
hereafter claim the same or any part thereof, by, from and under 
his/her/their successors and/or assigns or any of them, subject to validly 
and legally existing encumbrances of record.

IN WITNESS WHEREOF, the said Grantor/s has/have caused these presents to be 
duly executed, the day and year first above written.

<PAGE>

ATTEST:                                RREEF MIDAMERICA EAST-V SIX, 
                                       INC., a Delaware corporation

By:                                    By:  RREEF America L.L.C., a Delaware
   --------------------------------    limited liability company, its investment
                                       advisor

                                             By:
                                                --------------------------
                                                Authorized Representative 


[Add Pennsylvania address certification]


                                          2
<PAGE>

STATE OF----------------------)
                              )    SS.
COUNTY OF---------------------)


     I, _________________________________________, a notary public in and for 
said County, in the State aforesaid, DO HEREBY CERTIFY that _________________ 
and _________________, personally known to me to be the _________________ and 
_________________ of RREEF MidAmerica East-V Six, Inc., a Delaware 
corporation, and personally known to me to be the same persons whose names 
are subscribed to the foregoing instrument, appeared before me this day in 
person and acknowledged that as such _________________ and _________________, 
they signed and delivered the said instrument as their free and voluntary 
act, and as the free and voluntary act and deed of said trust, for the uses 
and purposes therein set forth.

     GIVEN under my hand and official seal this ____ day of _________, 1998.


                                       -----------------------------------
                                                Notary Public

Commission expires 
                   --------------------------------------------------------

                                          3
<PAGE>

                                      EXHIBIT A

                                  Legal Description

<PAGE>

                                    Schedule 8.6.2

                                  FIRPTA CERTIFICATE

     Section 1445 of the Internal Revenue Code provides that a transferee of 
a U.S. real property interest must withhold tax if the transferor is a 
foreign person.  To inform the transferee that withholding of tax is not 
required upon the disposition of a U.S. real property interest by 
__________________________________________, a _______________________ 
("Seller") hereby certifies the following:

1.   Seller is not a foreign corporation, foreign partnership, foreign trust or
     foreign estate (as those terms are defined in the Internal Revenue Code and
     Income Tax Regulations);

2.   Seller's U.S. employer identification number is 94-3082895; and

3.   Seller's principal place of business is 101 California Street, 26th floor,
     San Francisco, CA 94111-5853

     Seller understands that this certification may be disclosed to the 
Internal Revenue Service by transferee and that any false statement contained 
herein could be punished by fine, imprisonment, or both.

     Under penalties of perjury I declare that I have examined this 
certification and to the best of my knowledge and belief it is true, correct 
and complete, and I further declare that I have authority to sign this 
document on behalf of Seller. 

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

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

                                       By:
                                          ---------------------------------
                                          Authorized Representative


Subscribed and sworn to
before me this ____ day of
__________, 1998. 



- ------------------------------------
Notary Public

<PAGE>

                                    Schedule 8.6.4

                         ASSIGNMENT AND ASSUMPTION OF LEASES

          THIS ASSIGNMENT AND ASSUMPTION OF LEASES (the "Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between ___________________________, a Delaware 
corporation, ("Assignor") and ________________, a ______________ ("Assignee").

     A.   Assignor is the lessor under certain leases executed with respect 
to that certain real property and improvements thereon known as 
______________________, _______________________, and more particularly 
described in Exhibit "A" attached hereto (the "Property"), which leases are 
described in Exhibit B attached hereto (the "Leases").

     B.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase the Property from Assignor and 
Assignor agreed to sell the Property to Assignee, on the terms and conditions 
contained therein.

     C.   Assignor desires to assign its interest as lessor in the Leases to 
Assignee, and Assignee desires to accept the assignment thereof, on the terms 
and conditions below.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance Date") [SHOULD BE THE DAY FOLLOWING 
CLOSING], Assignor hereby assigns to Assignee all of its right, title, and 
interest in and to the Leases except rents and other sums due Assignor first 
accruing on or prior to the Conveyance Date, and, effective as of the day 
following the Conveyance Date,  Assignee hereby accepts such assignment.

     2.   Assignor hereby assumes full responsibility for all obligations and 
defaults of landlord under the Leases accruing prior to and including the 
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee 
harmless from any claims, liabilities or costs (including reasonable 
attorneys' fees) arising from Assignor's failure to perform said obligations, 
provided that Assignee makes a claim hereunder on or before one (1) year 
following the Conveyance Date.

     3.   Assignee hereby assumes full responsibility for all obligations of 
landlord under the Leases accruing after the Conveyance Date and Assignee 
hereby agrees to defend, indemnify and hold Assignor harmless from any 
claims, liabilities or costs (including reasonable attorneys' fees) arising 
from Assignee's failure to perform said obligations.  Without limiting the 
generality 

<PAGE>

of the foregoing, Assignee assumes full responsibility for the free rent, 
unpaid tenant improvement allowances and leasing commissions under the Leases 
as listed on Exhibit C.

     4.   This Assignment shall be governed by the laws of the Commonwealth 
of Pennsylvania.

     5.   This Assignment may be executed in counterparts.

     6.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers.  

    IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment 
and Assumption of Leases.


ASSIGNOR:                              ASSIGNEE:

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

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

By:                                    By:
   ----------------------------           ----------------------------
    Authorized Representative

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

Dated:                                 Dated:
      -------------------------              -------------------------


                                          2

<PAGE>

                                      EXHIBIT A

                                  Legal Description


                                          3

<PAGE>
 
                                      EXHIBIT B

                                   Existing Leases

                              (rent roll to be attached)


                                          4

<PAGE>

                                      EXHIBIT C

           Free Rent, Tenant Improvement Allowances and Leasing Commissions


                                          5

<PAGE>

                                    Schedule 8.6.5

                ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES

          THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES (the 
"Assignment") dated as the dates of execution set forth below, but effective 
as of the Conveyance Date (as herein defined), is between ____________________ 
_____________________, ("Assignor") and ________________, a 
___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a 
condition precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance Date")[SHOULD BE THE DAY FOLLOWING 
CLOSING] , Assignor hereby assigns to Assignee all of its right, title, and 
interest in and to the following:

     2.   Assignor hereby grants, transfers and assigns to Assignee all the 
right, title and interest of Assignor in and to the following:

          (a) All contracts listed on Exhibit B attached hereto.

          (b) All presently effective and assignable warranties, guaranties, 
representations or covenants given to or made in favor of Assignor or 
Assignor's affiliates in connection with the acquisition, development, 
construction, maintenance, repair, renovation or inspection of the Property.

     The foregoing are collectively referred to herein as the "Contracts."

     3.   Assignor hereby assumes full responsibility for all obligations and 
defaults of Assignor under the Contracts accruing to and including the 
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee 
harmless from any claims, liabilities or costs (including reasonable 
attorneys' fees) arising from Assignor's failure to perform said obligations, 
provided that Assignee makes a claim hereunder on or before one (1) year 
following the Conveyance Date.

<PAGE>

     4.   Assignee hereby assumes full responsibility for all obligations of 
owner of the Property under the Contracts accruing after the Conveyance Date 
and Assignee hereby agrees to defend, indemnify and hold Assignor harmless 
from any claims, liabilities or costs (including reasonable attorneys' fees) 
arising from Assignee's failure to perform said obligations.

     5.   This Assignment shall be governed by the laws of the Commonwealth 
of Pennsylvania.

     6.   This Assignment may be executed in counterparts.

     7.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers.  

      IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment 
and Assumption of Contracts and Warranties.


ASSIGNOR:                              ASSIGNEE:

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

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


By:                                    By:
   ----------------------------           ----------------------------
   Authorized Representative
                                       Title: 
                                             -------------------------

Dated:                                 Dated:
      -------------------------              -------------------------


                                          2

<PAGE>

                                      EXHIBIT A

                                  Legal Description






                                          3

<PAGE>

                                      EXHIBIT B

                                      Contracts


A.T. BUILDERS
CROWN CONTRACTORS, INC
ELDREDGE, INC.
OLIVER SPRINKLER CO.
DOUGLAS SCOTT LANDSCAPING
PHOENIX MECHANICAL INC.
WAYMAN FIRE PROTECTION


                                          4

<PAGE>

                                    Schedule 8.6.6

                              ASSIGNMENT OF INTANGIBLES

          THIS ASSIGNMENT AND ASSUMPTION OF INTANGIBLES ("Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), 
is between ____________________________________________________________________
("Assignor") and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a 
condition precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance 
Date")[SHOULD BE THE DAY FOLLOWING CLOSING], Assignor hereby assigns to 
Assignee all of its right, title, and interest in and to the following:

          (i)  All licenses, permits, certificates of occupancy, approvals,
     dedications, subdivision maps or plats and entitlements issued, approved or
     granted by federal, state or municipal authorities or otherwise in
     connection with the Property and its renovation, construction, use,
     maintenance, repair, leasing and operation; and all licenses, consents,
     easements, rights of way and approvals required from private parties to
     make use of utilities, to insure pedestrian ingress and egress to the
     Property and to insure continued use of any vaults under public
     rights-of-way presently used in the operation of the Property.  

          (ii)  any trade style or trade name used in connection with the
     Property; and,

          (iii)  all correspondence with the tenants under tenant leases, all
     booklets and manuals relating to the maintenance and operation of the
     Property. 

     The foregoing are collectively referred to herein as the "Intangibles".  

     2.   Assignor agrees to assume full responsibility for its obligations 
under the Intangibles accruing on or prior to the Conveyance Date  and 
Assignor agrees to defend, indemnify and hold Assignee harmless from any 
claims, liabilities or costs arising from 

<PAGE>

Assignor's failure to perform said obligations, provided that Assignee makes 
a claim hereunder on or before one (1) year following the Conveyance Date.

     3.   Assignee assumes full responsibility for all obligations of the 
owner of the property accruing under the Intangibles from the day after the 
Conveyance Date  and Assignee agrees to defend, indemnify and hold Assignor 
and its predecessors in title harmless from all claims, liabilities or costs 
arising from Assignee's failure to perform said obligations.

     4.   This instrument may be executed in counterparts.

     5.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers

     IN WITNESS WHEREOF, the parties have executed this Assignment of 
Intangibles. 


ASSIGNOR:                              ASSIGNEE:   

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

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

By:                                    By:
   ----------------------------           ----------------------------
   Authorized Representative
                                       Title:
                                             -------------------------

Dated:                                 Dated:
      -------------------------              -------------------------


                                          2

<PAGE>
                                      EXHIBIT A

                                  Legal Description


                                          3

<PAGE>

                                    Schedule 8.6.8

                                     BILL OF SALE

      __________________________________________________________ ("Seller"), in
consideration of Ten and No/100 Dollars and other good and valuable 
consideration, the receipt and sufficiency of which is hereby acknowledged, 
hereby sells, transfers, assigns and sets over unto __________________ 
("Purchaser"), all of its right, title and interest in and to any and all 
personal property, which personal property is owned by Seller and located on 
the real estate legally described on Exhibit A attached hereto (the "Personal 
Property"), including, but not limited to, the Personal Property listed on 
Exhibit B.

     Seller hereby represents and warrants to Purchaser that Seller is the 
absolute owner of the Personal Property free and clear of all liens, charges 
and encumbrances, and that Seller has full right, power and authority to sell 
the Personal Property and to make this Bill of Sale. ALL WARRANTIES OF 
QUALITY, FITNESS AND MERCHANTABILITY ARE HEREBY EXCLUDED. 

     The obligations of Seller contained herein are intended to be binding 
only on the property of the Seller and shall not be personally binding upon, 
nor shall any resort be had to the private properties of, any of the 
investment managers of Seller, or any general partners thereof, or any 
employees or agents of the  investment managers

    IN WITNESS WHEREOF, Seller has executed this Bill of Sale as of the ___ 
day of _______, 1998, but effective on the date on which the Property is 
conveyed by Seller to Purchaser.


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

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


                                       By:
                                          ----------------------------
                                          Authorized Representative

<PAGE>

STATE OF _________       )
                         )  SS
COUNTY OF _______        )

          The undersigned, a Notary Public in and for said County in the 
State aforesaid, DOES HEREBY CERTIFY that ________________, authorized 
representative of ____________________________________________________________,
who is personally known to me to be the same person whose name is subscribed 
to the foregoing instrument as such authorized representative, appeared 
before me this day in person and acknowledged that __he, being duly 
authorized, signed, sealed and delivered the said instrument as h___ free and 
voluntary act, and as the free and voluntary acts of said corporation, for 
the uses and purposes therein set forth.

          GIVEN under my hand and Notarial Seal this ___ day of _________, 1998.


                                       -------------------------------
                                       Notary Public


My Commission Expires:

__________________, 19___


                                          2

<PAGE>

                                      EXHIBIT A

                                  Legal Description


                                          3

<PAGE>

                                      EXHIBIT B

                                  Personal Property

                                        (none)


                                          4

<PAGE>

                                   Schedule 8.6.10

                             SELLER'S CLOSING CERTIFICATE

     THIS CLOSING CERTIFICATE is made as of the ________ day of _______________,
1998, by and between ___________________________ ("Seller"), to and in favor of 
______________________, a _________________ ("Purchaser"), under and pursuant to
that certain Agreement of Purchase and Sale by and between Seller and 
_________________, with an Effective Date as defined therein (the 
"Agreement"), for the purchase and sale of that certain Property situated in 
the _________________, _________________ County,_________________ (as defined 
in the Agreement).

     Pursuant to Paragraphs 5.3 and 8.6.10 of the Agreement and except as 
disclosed on Exhibit A attached hereto and made a part hereof, Seller hereby 
reconfirms, remakes and rewarrants to Purchaser as of the date hereof each of 
the representations, warranties and covenants given by Seller contained in 
Paragraph 5.1 of the Agreement in the same manner as such representations, 
warranties and covenants were given in the Agreement, each of which is 
incorporated herein and made a part hereof by this reference.  Except as 
modified hereby, Seller hereby confirms that each of said representations, 
warranties and covenants are true and accurate in all material respect as of 
the date hereof.  Seller's reconfirming, remaking and rewarranting of its 
representations, warranties and covenants is subject to the limitations set 
forth in Paragraph  5.3 of the Agreement.

     The obligations of Seller contained herein are intended to be binding 
only on the property of the Seller and shall not be personally binding upon, 
nor shall any resort be had to the private properties of, any of the 
investment managers of Seller, or any general partners thereof, or any 
employees or agents of the  investment managers

     IN WITNESS WHEREOF, Seller has executed this Closing Certificate on the 
day and year first above written, but effective upon the date on which the 
Property is conveyed by Seller to Purchaser.


SELLER:

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

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


By:
   --------------------------
    Authorized Signatory

<PAGE>

                                      EXHIBIT A

                                      Disclosure

<PAGE>

                                    Schedule 9.7.2

New Lease Approval Form

Property:
         ---------------------------------------------------------------------
Tenant:
       -----------------------------------------------------------------------
Square Feet:
            ------------------------------------------------------------------
Location:
         ---------------------------------------------------------------------
Anticipated Lease Commencement:
                               -----------------------------------------------
Anticipated Rent Commencement: 
                               -----------------------------------------------
Term:
     -------------------------------------------------------------------------
FREE RENT:
          --------------------------------------------------------------------
Rental Rate:             Period         PSF Rate       Annual Income
            -------------------  ---------------  ------------------

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

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

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

Note: Above rental rates do not include Tenant Electric

Tenant Improvement Allowance: PSF                       Amount
                                 ---------------------        ----------------
T.I. Mechanism:
               ---------------------------------------------------------------

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

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

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

OPTIONS: --------------------------------------------------------------------
        ---------------------------------------------------------------------
- -----------------------------------------------------------------------------
Initial Commission:

     BROKER               %                            Amount
- ------------------------------------------------------------------------------

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

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

Broker Future Entitlements:
                           ---------------------------------------------------

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

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

Other Comments: 
               ---------------------------------------------------------------

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

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

Approved By: 
            -----------------

<PAGE>

                                    Schedule 9.26

                         SEC COMPLIANCE REPRESENTATION LETTER

(Accountant Name & Address)

Dear Sirs:

     In connection with your audit of the statement of revenues and certain 
expenses of the Property situated in the Bucks County, Pennsylvania, commonly 
known as 180 Wheeler Court (the "Property") for the year ended December 31, 
199__ (the "Operating Statement"), prepared for the purpose of complying with 
the rules and regulations of the Securities and Exchange Commission, the 
undersigned ("Seller") makes the following limited, qualified and specific 
representations, which are true to Seller's knowledge (as such phrase is 
hereinafter defined):

     1.   Seller has made available or caused its property manager to make
          available to Brandywine Operating Partnership, L.P.  ("Buyer"), or its
          representatives, Seller's financial records and files in Seller's
          actual possession pertaining to the operation of the Property (such
          records and files being collectively referred to herein as the
          "Files").

     2.   Except as disclosed in the Files, Seller is not aware of any events or
          transactions which have occurred since December 31, 199_ and prior to
          the date hereof that would have a material effect on the Operating
          Statement for the period then ended.

     3.   We recognize that, as the Owner of the Property, we are responsible
          for directing the fair presentation of the Operating Statement.  We
          believe the Operating Statement is fairly presented in conformity with
          generally accepted accounting principals.

     As used in this letter, the words "Seller's knowledge" shall be deemed 
to mean, and shall be limited to, the actual (as distinguished from implied, 
imputed or constructive) knowledge of Joseph S. Cappelletti and Barbara 
Gillentine without such person having any obligation to make an independent 
inquiry or investigation.

     Notwithstanding any provision in this letter to the contrary, Seller is 
executing this letter solely as an accommodation to and at the request of 
Buyer and, except to the extent Seller is liable to Buyer for representations 
and warranties expressly set forth in that certain Agreement of Purchase and 
Sale, dated _________ 1998, by and between Seller and Buyer (the "Sale 
Agreement'), this letter is subject to the condition that Seller shall not be 
liable or responsible to Buyer, any parent, subsidiary or other affiliate of 
Buyer, or any officer, director, employee, agent, representative, 
shareholder, partner or principal of Buyer or any such parent, subsidiary or 
other affiliate thereof or any accountant or other professionals engaged by 
or on behalf of any of the foregoing, including, without limitation, 
[accountant] (all of the foregoing being collectively referred to herein as 
the "Buyer Parties"), as a result of the fact that any of the statements made 
herein are in any way inaccurate, untrue or incorrect.  By the acceptance of 
this letter, except for rights and remedies that Buyer may have under the 
Sale Agreement with respect to representations and warranties expressly set 
forth in the Sale Agreement, each of the Buyer Parties shall be deemed to 
have waived any and all rights and remedies that any of them may have against 
Seller, whether at law or in equity, as a result of the fact that any of the 
statements made herein are in any way inaccurate, untrue or incorrect.

                                          4

<PAGE>

     Seller has executed this letter for the limited purposes set forth 
herein, and for the use of [accountant] only.  No other parties may rely on 
the statements set forth herein.

                                       Very truly yours,

                                       RREEF MIDAMERICA EAST-V SIX, INC., 
                                       a Delaware corporation

                                       By: RREEF America L.L.C.,
                                           a Delaware limited liability company

                                       By:
                                          --------------------------------
                                       Name:  Joseph S. Cappelletti
                                       Title: Its Authorized Representative

                                       By: 
                                          --------------------------------
                                       Name:  Barbara J. Gillentine
                                       Title: Its Authorized Representative


                                          5

<PAGE>

                                      EXHIBIT A

                            Legal Description of Property


<PAGE>




                         AGREEMENT OF PURCHASE AND SALE


                                    between


               Brandywine Operating Partnership, L.P., Purchaser,


                                      and


                            RREEF USA Fund-I, Seller


                         King of Prussia Business Park
    King of Prussia, Upper Merion Township, Montgomery County, Pennsylvania


<PAGE>

                               Table of Contents



1.   Purchase Price. . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

2.   Deposit.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

3.   Review of the Property. . . . . . . . . . . . . . . . . . . . . . . .   2

4.   Title and Survey. . . . . . . . . . . . . . . . . . . . . . . . . . .   3

5.   Representations and Warranties. . . . . . . . . . . . . . . . . . . .   4
          5.1   Representations and Warranties of Seller.. . . . . . . . .   4
          5.2   Representations and Warranties of Purchaser. . . . . . . .   7
          5.3   Limitations.   . . . . . . . . . . . . . . . . . . . . . .   7
          5.4   Condition of Property. . . . . . . . . . . . . . . . . . .   8

6.   Closing Conditions. . . . . . . . . . . . . . . . . . . . . . . . . .   8
          6.1   Title Insurance. . . . . . . . . . . . . . . . . . . . . .   9
          6.2   Estoppel Letters . . . . . . . . . . . . . . . . . . . . .   9
          6.3   Representations and Warranties . . . . . . . . . . . . . .  10
          6.4   Seller Performance . . . . . . . . . . . . . . . . . . . .  10

7.   Other Agreements. . . . . . . . . . . . . . . . . . . . . . . . . . .  10

8.   Closing.    . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
          8.1   Closing of Sale. . . . . . . . . . . . . . . . . . . . . .  10
          8.2   Prorations; Adjustments. . . . . . . . . . . . . . . . . .  11
          8.3   Proration of Service Charges.. . . . . . . . . . . . . . .  12
          8.4   Closing Costs. . . . . . . . . . . . . . . . . . . . . . .  12
          8.5   Possession.. . . . . . . . . . . . . . . . . . . . . . . .  12
          8.6   Seller's Closing Documents.. . . . . . . . . . . . . . . .  12
          8.7   Purchaser's Closing Documents. . . . . . . . . . . . . . .  13
          8.8   Joint Deliveries.. . . . . . . . . . . . . . . . . . . . .  14

9.   Miscellaneous.. . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
          9.1   Modifications. . . . . . . . . . . . . . . . . . . . . . .  14
          9.2   Casualty and Condemnation. . . . . . . . . . . . . . . . .  14
          9.3   Time of Essence. . . . . . . . . . . . . . . . . . . . . .  15
          9.4   Notices. . . . . . . . . . . . . . . . . . . . . . . . . .  15
          9.5   Parties Bound. . . . . . . . . . . . . . . . . . . . . . .  16

                                       i

<PAGE>

          9.6   Governing Law. . . . . . . . . . . . . . . . . . . . . . .  16
          9.7   Continuation Until Closing; Leasing. . . . . . . . . . . .  16
          9.8   Brokers. . . . . . . . . . . . . . . . . . . . . . . . . .  17
          9.9   Attorneys' Fees. . . . . . . . . . . . . . . . . . . . . .  17
          9.10  Remedies for Non-Performance.. . . . . . . . . . . . . . .  17
          9.11  Brokers Commission.. . . . . . . . . . . . . . . . . . . .  17
          9.12  Survival of Covenants. . . . . . . . . . . . . . . . . . .  18
          9.13  Seller's Investment Committee Approval.. . . . . . . . . .  18
          9.14  ERISA. . . . . . . . . . . . . . . . . . . . . . . . . . .  18
          9.15  Entry and Indemnity. . . . . . . . . . . . . . . . . . . .  18
          9.16  Release. . . . . . . . . . . . . . . . . . . . . . . . . .  19
          9.17  Confidential Information.  . . . . . . . . . . . . . . . .  19
          9.18  Calculation of Time Periods. . . . . . . . . . . . . . . .  20
          9.19  Entire Agreement.. . . . . . . . . . . . . . . . . . . . .  20
          9.20  Severability.. . . . . . . . . . . . . . . . . . . . . . .  20
          9.21  Facsimile Signatures.. . . . . . . . . . . . . . . . . . .  20
          9.22  Further Assurances.. . . . . . . . . . . . . . . . . . . .  20
          9.23  Offer. . . . . . . . . . . . . . . . . . . . . . . . . . .  20
          9.24  Seller Exculpation Clause. . . . . . . . . . . . . . . . .  21
          9.25  Purchaser Exculpation Clause.. . . . . . . . . . . . . . .  21
          9.26  SEC Reporting (8-K) Requirements.. . . . . . . . . . . . .  21

List of Schedules and Exhibits . . . . . . . . . . . . . . . . . . . . . .  23

                                       ii

<PAGE>

                         AGREEMENT OF PURCHASE AND SALE


     BRANDYWINE OPERATING PARTNERSHIP, L.P., a Delaware limited partnership 
("Purchaser") agrees to purchase, and RREEF USA FUND-I, a California group 
trust ("Seller") agrees to sell, that certain improved real property, 
hereinafter referred to as the "Property", situated in the City of King of 
Prussia, Upper Merion Township, Montgomery County, Commonwealth of 
Pennsylvania, legally described on Exhibit A attached hereto and made a part 
hereof, consisting of twelve (12) buildings and one vacant parcel, all as 
listed on Exhibit A-1 attached hereto and hereby made a part hereof, together 
with all rights, privileges, easements and appurtenances thereto,  including 
any and all mineral rights, development rights, air rights, and the like; all 
personal property owned by the Seller and located on or used in conjunction 
with the Property (specifically excluding furniture, fixtures and equipment 
owned by RREEF Management Company and located in the RREEF Management Company 
office, as well as the 650 Park Avenue canopy and canopy structure); any and 
all intangible personal property owned by Seller and used in the operation of 
the Property, including the right to use the name of the property (but not 
the name "RREEF"), to the extent assignable, but excluding computer software 
and related licenses; contract rights, "Leases" of all or any part of the 
Property, all licenses, permits and other written authorizations necessary 
for the use, operation and ownership of the Property, records, security 
deposits and prepaid rent, if any, and the benefit of any guaranties of the 
Leases.

     1.   Purchase Price.  The purchase price for the Property ("Purchase 
Price") is Forty-Six Million Three Hundred Sixty Thousand Dollars 
($46,360,000.00), payable by wire transfer of immediately available funds at 
Closing as defined in Paragraph 8.1.

     2.   Deposit.

          2.1    Purchaser has previously deposited, pursuant to this 
Agreement and pursuant to the Other Agreements (defined in Paragraph 7 
below), the amount of Five Hundred Fifty Thousand Dollars ($550,000.00) (the 
"Deposit") with Commonwealth Land Title Insurance Company ("Escrow Holder") 
as earnest money to secure Purchaser's performance hereunder and under the 
Other Agreements.  The Deposit may be invested at the direction of Purchaser 
with the approval of Seller.  All investment income earned from the 
investment of the Deposit, less investment fees, if any, will be added to and 
become a part of the Deposit and will be applied toward the Purchase Price if 
Closing is completed in accordance with this Agreement; otherwise all 
interest will be paid to the party entitled to the Deposit.  The escrow 
instructions to Escrow Holder will be in the form of Schedule 2.1 attached 
hereto (the "Escrow Instructions").   If Purchaser does not elect to 
terminate this Agreement pursuant to Section 3 below, prior to the end of the 
Review Period (defined in Section 3.4), on or before one business day after 
last day of the Review Period Purchaser shall deposit an additional $500,000 
with Escrow Holder, which shall be added to and become a part of the Deposit 
for all purposes hereunder.

<PAGE>

          2.2    Of the total Deposit, the sum of $150,000 is agreed to be 
non-refundable, and shall be refunded to Purchaser only (i) if Purchaser 
terminates this Agreement under Section 3.4, under the circumstances set 
forth in Section 3.4.1, or (ii) if the Agreement is terminated or if the 
Closing fails to occur by reason of Seller's default.  Under all other 
circumstances, wherever under this Agreement and the Other Agreements the 
Deposit is to be returned to Purchaser, $150,000 out of the Deposit shall be 
paid to Seller, to be retained by Seller as fully earned.

     3.   Review of the Property.

          3.1    From and after the "Effective Date" (as defined in Paragraph 
9.23), Seller agrees to provide Purchaser and its agents or consultants with 
access to the Property to inspect each and every part thereof to determine 
its present condition and to conduct such physical and environmental studies 
(including a mechanical and roof study and Phase I environmental assessment) 
as it deems appropriate.

          3.2    Within three (3) business days after the Effective Date 
Seller will make available to Purchaser for inspection and copying, all to 
the extent in the possession of Seller or its managing agent, a copy of each 
existing Lease  and equipment lease, service contract and maintenance or 
other contract pertaining to the operations of the Property that will survive 
Closing, a copy of each  real estate tax bills for 1994-1996, both inclusive, 
and unaudited financial statements for the Property for the years 1994-1996, 
both inclusive.

          3.3    Within three (3) business days after the Effective Date 
Seller will make available to Purchaser for inspection and copying at the 
office of Seller's managing agent, all to the extent in the possession of 
Seller or its managing agent:

                 3.3.1    a copy of each environmental reports relating to 
the Property prepared by third party consultants since January 1, 1995.

                 3.3.2    a copy of each current franchises, business or 
other licenses, bonds, permits, certificates, authorizations and other 
evidences of consent, approval, authorization or permission relating to or 
affecting the Project of or from any person, including any governmental 
authority, held by Seller, including any pending applications.

                 3.3.3    a copy of each material third party warranties and 
guaranties, if  any, which are in effect with respect to the Property.

          3.4    Purchaser has until 5:00 p.m. CST on February 2, 1998 (the 
"Review Period"), to determine in its sole discretion whether all matters 
relating to the Property (except title and survey, which are governed by 
Paragraph 4), are acceptable, and to obtain the approval of the transaction 
contemplated herein by Seller's Board of Directors.  If Purchaser concludes 
that any matter relating to the Property is not acceptable or that its Board 
has disapproved the

                                       2
<PAGE>

transaction, Purchaser will so notify Seller (the "Termination Notice") prior 
to the expiration of the Review Period (which notice shall contain a copy of 
Purchaser's roof/structural report and other reports or studies, other than 
environmental reports, obtained in connection with Purchaser's due 
diligence). Upon timely delivery of the Termination Notice,  this Agreement 
will terminate without liability on the part of Seller or Purchaser, other 
than Purchaser's indemnity contained in Paragraph 9.15 hereof and the 
obligation to deliver to Seller a copy of any environmental report obtained 
by Purchaser if requested by Seller within ten (10) days after receipt of the 
Termination Notice.  In the event that Purchaser does not timely so notify 
Seller, Purchaser will be deemed to have concluded that all matters relating 
to the Property are acceptable and to have elected to proceed with the 
transaction upon the terms and conditions contained in this Agreement 
(including the obligation to increase the amount of the Deposit by an 
additional $500,000) without regard to this Paragraph 3.4.

                 3.4.1    If this Agreement is terminated pursuant to 
Paragraph 3.4, the Deposit, less $150,000, will be returned to Purchaser as 
provided in the Escrow Instructions.  This $150,000 shall be paid to Seller, 
unless Purchaser's termination resulted from (i) Seller's default, (ii) a 
material deviation from the economics of the Property as presented in 
Seller's offering memorandum (it being understood and agreed that Seller 
makes no warranty or representation as to said offering memorandum), or (iii) 
any material structural or environmental defect in the Property not known or 
disclosed to Purchaser before December 22, 1997.

          3.5    Purchaser agrees that any information obtained by Purchaser 
or its authorized agents in the conduct of its due diligence will be treated 
as confidential pursuant to Paragraph 9.17.

     4.   Title and Survey.  Purchaser has ordered, at its expense (and upon 
receipt, Purchaser shall promptly deliver copies to Seller): (i) a commitment 
for a 1992 form ALTA Owner's title insurance policy with respect to the 
Property from Commonwealth Land Title Insurance Company (the "Title Insurer") 
in the amount of the Purchase Price, and (ii) copies of all documents 
relating to title exceptions referred to therein.  Seller has already 
ordered, and Purchaser has received, at Purchaser's sole expense, a plat of 
survey of the Property made in accordance with Minimum Standard Detail 
Requirements for ALTA/ACSM Land Title Surveys (1992) pursuant to the accuracy 
standards of an Urban Survey.  On or before January 30, 1998, Purchaser 
agrees to notify Seller of any objection Purchaser may have to any exceptions 
reported in the commitment or any matter shown on the plat of survey (the 
"Unacceptable Exceptions").  Seller will be responsible for satisfaction of 
the Title Insurer's Schedule B-1 seller requirements.  All other exceptions 
and survey matters will be deemed acceptable to Purchaser.  If Purchaser 
fails to give such notice to Seller, the survey and all of the exceptions in 
the title commitment will be deemed acceptable to Purchaser.  Seller will 
have ten (10) days after receipt of Purchaser's notice within which to notify 
Purchaser whether Seller elects to either (a)  eliminate or induce the Title 
Insurer to insure over (subject to Purchaser's consent, not to be 
unreasonably withheld) the Unacceptable Exceptions or (b) terminate this 
Agreement.  If Seller agrees to eliminate or induce to the Title Insurer to 
insure over (with Purchaser's consent) the

                                       3
<PAGE>

Unacceptable Exceptions, Seller will be obligated to do so at its cost on or 
prior to Closing.   If Seller elects to terminate this Agreement, neither 
party will have any further rights or obligations hereunder, except as 
provided in Paragraph 9.15.  If Seller fails to give any timely notice, 
Seller will be deemed to have elected to terminate this Agreement.  If  any 
other recorded exception to title is discovered after the commitment is 
delivered to Purchaser, and Purchaser does not elect to waive such exception 
upon the first to occur of (a) the Closing or (b) seven (7) days after being 
notified of such exception and to proceed with the consummation of the 
Closing, Seller will have fifteen (15) days after the expiration of said 
seven (7) day period (and Closing will be delayed if necessary, so that it 
occurs not earlier than twenty-two (22) days after Purchaser is notified of 
such exception) after notifying Purchaser of such discovery in which to use 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over (subject to Purchaser's approval, not to be unreasonably 
withheld) such exception, and if such exception is not eliminated or insured 
over as aforesaid within said 15-day period, Purchaser may terminate this 
Agreement, in which event the Deposit will be returned to Purchaser and 
neither party will have any further rights or obligations hereunder except as 
provided in Paragraph 9.15, or close the sale subject to such exception.  
Seller agrees that it will pay off at Closing (and not induce the Title 
Insurer to insure over) title exceptions representing monetary liens of a 
definite or ascertainable amount voluntarily granted by Seller.  In using 
commercially reasonable efforts to eliminate or to induce the Title Insurer 
to insure over Unacceptable Exceptions, Seller will not be required to 
litigate or to expend more than $10,000 in the aggregate.  Ad valorem real 
estate taxes not yet due and payable and all title and survey matters which 
are not Unacceptable Exceptions are hereinafter referred to as Acceptable 
Exceptions.

     5.   Representations and Warranties.

          5.1    Representations and Warranties of Seller.  As used in this 
Paragraph 5.1 and elsewhere in this Agreement, the phrase "to the knowledge 
of Seller" or phrases of similar import mean and are limited to the actual 
current  knowledge, without duty to investigate or inquire, of Seller's 
portfolio manager (Pamela Boneham) and Seller's local manager  having ongoing 
management responsibility with respect to the Property (Barbara Gillentine), 
and not to any constructive knowledge of any of the foregoing individuals or 
of Seller or any investment advisor to Seller, any entity that is a partner 
in such investment advisor, or any affiliates of any thereof, or to any 
officer, agent, representative, or employee of Seller or such investment 
advisor, any such constituent partner, or any such affiliate.  Seller hereby 
warrants and represents to Purchaser (with such representations and 
warranties to be re-made as of Closing pursuant to Paragraph 8.6.10) as 
follows:

                 5.1.1    Pending Proceedings.  With the exception of the 
items set forth in  Schedule 5.1 (the "Disclosure Schedule") to the knowledge 
of Seller, Seller has received no written notice of special assessments, 
condemnation, environmental, zoning or other land use regulation proceedings, 
either pending or planned to be instituted, with respect to the Property or 
any part thereof.

                                       4
<PAGE>

                 5.1.2    Status of Seller and Closing Documents.  Subject to 
Paragraph 9.13, this Agreement has been, and all the closing documents to be 
delivered by Seller to Purchaser at Closing are or will be, duly authorized, 
executed, and delivered by Seller, will be sufficient to convey insurable 
title, are legal, valid, and binding obligations of Seller, are enforceable 
in accordance with their respective terms, and do not violate any provisions 
of any agreement to which Seller or the Property is subject or bound.  Seller 
is duly organized and validly existing and, if required, duly qualified to 
transact business in the State in which the Property is located.

                 5.1.3    Non-Foreign Status.  Seller is not a foreign person 
within the meaning of Section 1445(f)(3) of the Internal Revenue Code of 
1986, as amended.

                 5.1.4    Compliance with Laws.  With the exception of the 
items set forth in the Disclosure Schedule, Seller has received no 
governmental notice, not heretofore corrected, alleging that the Property or 
its current uses are in violation of any zoning, building, health, traffic, 
environmental, flood control or all other applicable rules, regulations, 
codes, ordinances, or statutes of any local, state and federal authorities or 
any other governmental authority (collectively, the "Laws") asserting 
jurisdiction over the Property.

                 5.1.5    Service Contracts.  With the exception of the items 
set forth in the Disclosure Schedule, to Seller's knowledge, there are no 
agreements or contracts affecting the Property (including, without 
limitation, any management, leasing, services or maintenance agreements) 
which are not terminable at will by Seller without further liability, upon 
not more than 30 days' prior written notice.  The contracts and agreements to 
be assigned to Purchaser pursuant to Paragraph 8.6.5 are listed on Schedule 
5.1.5 attached hereto.  Seller agrees to terminate the existing management 
agreement covering the Property on or before Closing.

                 5.1.6    No Default.  The execution and delivery of this 
Agreement, and consummation of the transaction described in this Agreement, 
does not and will not constitute a default under any contract, lease, or 
agreement to which Seller is a party or by which Seller is bound.

                 5.1.7    No Suits.  Except as set forth in the Disclosure 
Schedule and except for personal injury or property damage actions for which 
there is adequate insurance coverage and where the insurance carrier has 
accepted the tender of the defense without reservation, to Seller's 
knowledge, there is no action, suit or proceeding  pending or threatened 
against or affecting the Property or any portion thereof, or relating to or 
arising out of the ownership, management or operation of the Property, in any 
court or before or by any federal, state, or municipal department, 
commission, board, bureau or agency or other governmental instrumentality.

                 5.1.8    Environmental Condition.  Each of the following 
representations contained in this Paragraph 5.1.8 is wholly qualified and 
limited by (a) any matters disclosed in

                                       5
<PAGE>

any materials made available or delivered to Purchaser by Seller pursuant to 
Paragraph 3 above or otherwise, (b) any matters disclosed in any 
environmental reports or studies obtained by Purchaser, and (c) any other 
matters of which Purchaser has actual knowledge. Subject to the foregoing, 
Seller represents:

                          5.1.8.1  With the exception of items listed in the 
Disclosure Schedule, and except (i) in amounts customarily found in office 
uses and in the other uses for which the Property is suited and used and (ii) 
in compliance with applicable law, to Seller's knowledge, Seller has not 
released, generated or handled Hazardous Materials on the Property, and 
Seller has no knowledge of any release, generation or handling of Hazardous 
Materials on the Property by any tenants or the incorporation of Hazardous 
Materials by the tenants in any improvements on the Property during the time 
Seller owned the Property.  For the purposes hereof, "Hazardous Material"  
means any substance, chemical, waste or other material which is listed, 
defined or otherwise identified as "hazardous" or "toxic" under any federal, 
state, local or administrative agency ordinance or law, including, without 
limitation, the Comprehensive Environmental Response, Compensation and 
Liability Act, 42 U.S.C. Sections 9601 et seq. and the Resource Conservation 
and Recovery Act, 42 U.S.C. Sections 6901 et seq., or any regulation, order, 
rule or requirement adopted hereunder, as well as any formaldehyde, urea, 
polychlorinated biphenyls, petroleum, petroleum product or by-product, crude 
oil, natural gas, natural gas liquids, liquefied natural gas, or synthetic 
gas usable for fuel or mixture thereof, radon, asbestos, and "source," 
"special nuclear" and "by-product" material as defined in the Atomic Energy 
Act of 1985, 42 U.S.C. Sections 3011 et seq.

                          5.1.8.2  With the exception of items listed in the 
Disclosure Schedule, to Seller's knowledge, Seller has not received any 
summons, citation, directive, letter or other communication, written or oral, 
from the United States Environmental Protection Agency or the State 
environmental protection agency having jurisdiction over the Property.

                 5.1.9    Options.  Seller has granted no options or rights 
of first refusal to acquire any interest in the Property not set forth in the 
Leases delivered to Purchaser or in documents of record disclosed in the 
title commitment.  The purchase rights of the U.S. Postal Service under its 
lease have expired without exercise.

                 5.1.10   Rent Roll.  To Seller's knowledge, the information 
set forth on the rent roll attached hereto as Schedule 5.1.10  is true and 
accurate in all material respects.

                 5.1.11   Tenant Rights.  There are no termination, 
extension, cancellation, or expansion rights under any occupancy arrangements 
with respect to the Property except as contained in the Leases.

                 5.1.12   Leasing Commissions.  All leasing commissions, free 
rent and tenant improvement allowances due and payable as of the date hereof 
by Seller have been paid or will have been paid on or before Closing.  To 
Seller's knowledge, the only current leases as to

                                       6
<PAGE>

which commissions, free rent and tenant improvement allowances may become due 
in the future are listed on Schedule 5.1.12, which future obligations shall 
be expressly assumed by Purchaser.

                 5.1.13   There are no employees of the Property or Seller 
who will become employees of Purchaser or for which Purchaser shall be 
responsible in any way.

          5.2    Representations and Warranties of Purchaser.  Purchaser 
hereby represents and warrants to Seller that this Agreement has been, and 
all the documents to be delivered by Purchaser to Seller will be, duly 
authorized, executed, and are or will be legal, valid, and binding 
obligations of Purchaser, are or will be enforceable in accordance with their 
respective terms, and do not and will not at Closing violate any provisions 
of any agreement to which Purchaser is subject.

          5.3    Limitations.  Each of the representations and warranties of 
Seller contained in Paragraph 5.1: (i) is made as of the date of this 
Agreement; (ii) will be deemed to be remade by Seller, and to be true in all 
material respects, as of Closing, subject to other matters expressly 
permitted in this Agreement or otherwise specifically approved in writing by 
Purchaser; and (iii) will survive for a period of one (1) year after the 
Closing Date, as defined in Paragraph 8.1.  Any claim that Purchaser may have 
at any time against Seller for a breach of any such representation or 
warranty, whether known or unknown, which is not asserted by notice from 
Purchaser to Seller within such six (6) month period will not be valid or 
effective, and Seller will have no liability with respect thereto.  Nor will 
Seller have any liability to Purchaser for a breach of any representation or 
warranty unless the valid claims for all such breaches collectively aggregate 
more than One Hundred Thousand Dollars ($100,000.00), in which event the full 
amount of such valid claims shall be actionable, subject to the limitation in 
Section 9.10. The continued accuracy in all material respects of the 
aforesaid representations and warranties is a condition precedent to 
Purchaser's obligation to close.  If any of said representations and 
warranties is not correct in all material respects at the time the same is 
made or as of Closing, and Seller had no knowledge of such inaccuracy when 
the representation or warranty was made, or when remade at Closing, or if 
such warranty or representation becomes inaccurate on or prior to Closing 
other than by reason of Seller's default hereunder, Purchaser may, upon being 
notified of such occurrence on or prior to Closing either (a) terminate this 
Agreement without liability on the part of Seller or Purchaser, other than 
Purchaser's indemnity contained in Paragraph 9.15 and the Deposit will be 
returned to Purchaser, or (b) waive such matter and proceed to Closing, by 
notice to Seller given within ten (10) days after Purchaser is notified of 
such occurrence, but in no event later than Closing.  If Purchaser fails to 
give any notice within the required time period, Purchaser will be deemed to 
have elected to waive such matter and to proceed to Closing.  If any of said 
representations and warranties are not correct in all material respects at 
the time the same is made or as of Closing, and Seller had knowledge of such 
inaccuracy when the representation or warranty was made, or, by its default 
hereunder caused the representation or warranty to be inaccurate when remade 
at Closing, Purchaser may either (x) terminate this Agreement subject to its 
obligations under Paragraph 9.15, receive a return of the Deposit and recover 
from Seller all of Purchaser's actual, reasonable out-of-pocket costs 
incurred in connection with its review of

                                       7
<PAGE>

the Property or (y) waive the breach and its rights under clause (x) and 
proceed to Closing, by notice to Seller given within ten (10) days after 
Purchaser is notified of such occurrence, but in no event later than Closing. 
If Purchaser fails to give any notice within the required time period, 
Purchaser will be deemed to have elected to waive such matter and to proceed 
to Closing.

          5.4    Condition of Property.  Except as expressly set forth in 
this Agreement, Seller has not made and does not hereby make any 
representations, warranties or other statements as to the condition of the 
Property and Purchaser acknowledges that at Closing it is purchasing the 
Property on an "AS IS, WHERE IS" basis and without relying on any 
representations and warranties of any kind whatsoever, express or implied, 
from Seller, its agents or brokers as to any matters concerning the Property. 
 Except as expressly set forth in this Agreement, no representations or 
warranties have been made or are made and no responsibility has been or is 
assumed by Seller or by any partner, officer, person, firm, agent or 
representative acting or purporting to act on behalf of Seller as to the 
condition or repair of the Property or the value, expense of operation, or 
income potential thereof or as to any other fact or condition which has or 
might affect the Property or the condition, repair, value, expense of 
operation or income potential of the Property or any portion thereof.  The 
parties agree that all understandings and agreements heretofore made between 
them or their respective agents or representatives are merged in this 
Agreement and the Schedules and Exhibits hereto annexed, which alone fully 
and completely express their agreement, and that this Agreement has been 
entered into after full investigation, or with the parties satisfied with the 
opportunity afforded for investigation, neither party relying upon any 
statement or representation by the other unless such statement or 
representation is specifically embodied in this Agreement or the Exhibits 
annexed hereto.  Purchaser acknowledges that Seller has requested Purchaser 
to inspect fully the Property and investigate all matters relevant thereto 
and, with respect to the condition of the Property, to rely solely upon the 
results of Purchaser's own inspections or other information obtained or 
otherwise available to Purchaser, rather than any information that may have 
been provided by Seller to Purchaser.

     6.   Closing Conditions.  Purchaser's obligation to proceed to Closing 
is conditioned upon Seller's performance of the following obligations and 
satisfaction of the following conditions, in addition to all of its other 
obligations and conditions contained in this Agreement, provided that 
Purchaser may in its sole discretion elect to waive failure by Seller to 
perform any particular obligation.

          6.1    Title Insurance.  The Title Insurer is prepared to issue a 
policy of title insurance insuring Purchaser's interest in the Property being 
conveyed, subject only to Acceptable Exceptions.

          6.2    Estoppel Letters.  Seller has delivered to Purchaser not 
later than the date of Closing, estoppel letters substantially in the form of 
Schedule 6.2 ("Required Estoppel Form") or in form otherwise reasonably 
acceptable to Purchaser, prepared by Seller and

                                       8
<PAGE>

addressed to Purchaser, from tenants occupying in the aggregate at least 75% 
of the Property, measured by square footage.  All estoppel letters must be 
dated not more than forty-five (45) days prior to the date of Closing.  An 
estoppel letter form, even though not in the Required Estoppel Form, will be 
deemed reasonably acceptable to Purchaser if said letter contains the 
following information: confirming rent, security deposit, square footage  and 
termination date; that no rent has been paid more than one month in advance; 
that the lease is in full force and effect and that a true and correct copy 
of the lease with all amendments and modifications is attached; and that all 
work to be performed by Landlord has been performed and that the tenant has 
no knowledge of any Landlord default.

                 6.2.1    If Seller is unable to obtain the requisite 
estoppel letters as described above, Seller may (but is not required to) 
substitute for any unsigned estoppel letter from a tenant other than a Major 
Tenant an estoppel letter in the Required Estoppel Form, which may be 
completed, executed and delivered by Seller and warranted and represented by 
Seller, provided that such substituted estoppel letters will not collectively 
represent in excess of 10% of all of the tenants, measured by square footage. 
Seller's representations and warranties in the certificates will survive the 
Closing subject to the limitations of Paragraph 5.3.  In the event that, 
following the Closing Date, Seller or Purchaser obtains an estoppel letter 
complying with the requirements of Paragraph 6.2 with respect to any lease 
for which Seller delivered a substituted estoppel letter, Seller will deliver 
such estoppel letter to Purchaser and, upon such delivery, Seller will be 
automatically released from any liability or obligation under the substituted 
estoppel letter previously delivered by Seller with respect to such lease. 
Purchaser may (but shall not be required to) accept a substituted estoppel 
letter as to a Major Tenant as well.

                 6.2.2    If Seller is unable to obtain and deliver 
sufficient tenant estoppel certificates as required under Paragraph 6.2, or 
if the letters received under Paragraph 6.2 or substituted estoppels 
permitted under Paragraph 6.2.1 contain information or omissions unacceptable 
to Purchaser in its reasonable discretion, then Seller will not be in default 
by reason thereof, but Purchaser may, by notice given to Seller before the 
Closing, elect (i) to waive said conditions and proceed with the Closing or 
(ii) to terminate this Agreement, and receive a refund of the Deposit.  If 
Purchaser elects to terminate this Agreement. neither party will have any 
further rights or obligations hereunder except as provided in Paragraph 9.15.

          6.3    Representations and Warranties.  All of Seller's 
representations and warranties made pursuant to Paragraph 5.1 remain true and 
correct in all material respects.

          6.4    Seller Performance.  Seller has delivered all of the 
documents and other items required pursuant to Paragraph 8.6 and has 
performed all other covenants, undertakings and obligations required by this 
Agreement, to be performed or complied with by Seller at or prior to Closing.

     7.   Other Agreements.  The obligations of Purchaser and Seller to close 
hereunder shall also be conditioned upon the simultaneous closing of (a) the 
purchase by Purchaser or an

                                       9
<PAGE>

affiliate of Purchaser, of the industrial building commonly known as 741 
First Avenue, King of Prussia, Pennsylvania, pursuant to that certain 
Agreement of Purchase and Sale of even date herewith (the "741 First Avenue 
Agreement") between Purchaser, as purchaser, and RREEF MidAmerica/East 
Fund-IV  ("741 First Avenue Owner"), as seller, and (b) the purchase by 
Purchaser or an affiliate of Purchaser, of the industrial building commonly 
known as 180 Wheeler Court, Bucks County, Pennsylvania, pursuant to that 
certain Agreement of Purchase and Sale of even date herewith (the "Wheeler 
Court Agreement"; the 741 First Avenue Agreement and the Wheeler Court 
Agreement collectively the "Other Agreements") between Purchaser, as 
purchaser, and RREEF MidAmerica East-V Six, Inc. ("Wheeler Court Owner"; the 
741 First Avenue Owner and the Wheeler Court Owner are collectively referred 
to as the "Other Owners"), as seller.  This condition may be waived by the 
parties.  Without limiting the generality of the foregoing, if Purchaser 
terminates this Agreement pursuant to Section 3 or Section 4, the Other 
Owners shall have the right to terminate the Other Agreements as well; or, if 
Purchaser terminates one or more of the Other Agreements pursuant to Section 
3 or Section 4 of the Other Agreements, Seller shall have the right to 
terminate this Agreement as well.  A default by Purchaser under one or more 
of the Other Agreements shall be deemed a Purchaser default hereunder, and a 
default by an Other Owner under one or more of the Other Agreements shall be 
deemed a Seller default hereunder.

     8.   Closing.

          8.1    Closing of Sale.  The purchase and sale contemplated herein 
shall close (herein referred to as the "Closing") at the office of the Title 
Insurer, or as otherwise mutually agreed, on a date selected by Seller, which 
date (the "Closing Date") shall not be earlier than the date which is fifteen 
(15) days after the expiration of the Review Period nor more than thirty (30) 
days after expiration of the Review Period, time being of the essence.  At 
Closing, Seller will deliver to Purchaser a Special Warranty Deed ("Deed") in 
the form of Schedule 8.6.1 and other closing documents required hereunder and 
Purchaser will cause payment of the Purchase Price to be made to Seller by 
wire transfer.  The sale (payment of the Purchase Price and delivery of the 
Deed) may, at Purchaser's option to be exercised by notice to Seller at least 
five (5) days prior to the Closing Date, be closed through escrow with the 
Title Insurer in accordance with the general provisions of the usual form of 
escrow agreement used in similar transactions by such Title Insurer with 
special provisions inserted (i) as may be required to conform with this 
Agreement and (ii) to close on a so-called "New York Style" basis.

          8.2    Prorations; Adjustments.   The parties will prorate taxes, 
rental, and other income, and operating or other expenses of the Property as 
of 12:01 a.m. on the date after Closing (i.e., Seller is entitled to the 
income and responsible for the expenses of the day of Closing).  All income 
will be prorated on the basis of income actually received by Seller, as 
opposed to income which is due or for which Seller has rendered invoices but 
which has not been paid (i.e., Seller will not be entitled to any credit for 
receivables, and there will be no proration as to such receivables).  Any 
taxes or other expenses of the Property for any period prior to Closing which 
are payable by tenants of the Property subsequent to Closing (e.g., real 
estate taxes paid in

                                       10
<PAGE>

arrears and not yet billed to tenants), will reduce the credit to Purchaser 
for such items (i.e., no credit from Seller for pass-through items for which 
Purchaser will later collect from the tenants).  To the extent that the taxes 
to be prorated are not known with certainty, such proration will be based 
upon the most recent tax bill or county estimate, to be re-prorated upon 
issuance of final bills.  Seller also agrees to give Purchaser a credit 
against the Purchase Price for all cash security deposits required to be held 
pursuant to the Leases (less portions thereof applied by Seller to tenant 
defaults and not subsequently restored by the tenant in question) and all 
interest due thereon and shall assign to Purchaser any other tenant deposits 
held by Seller. Purchaser will pay amounts subsequently received by it from 
tenants constituting base rent, capital reimbursements or other income due 
from tenants and attributable to Seller's period of ownership, but not 
collected as of the date of Closing, to Seller promptly upon receipt; 
provided that amounts received from tenants by Purchaser will be first 
applied to current charges, and the balance will be applied to payments due 
to Seller.  Notwithstanding the foregoing, Seller shall expressly reserve the 
right to seek to collect, directly from the tenants after Closing and with 
Purchaser's cooperation, any delinquencies and other amounts attributable to 
Seller's period of ownership, but not collected as of the date of Closing.  
To the extent Seller has received amounts from tenants for real estate taxes 
and 1997 and 1998 operating expenses in excess of amounts paid by Seller with 
respect to such expenses, Seller will credit such excess to Purchaser at 
Closing, and Seller will provide adequate backup information in connection 
with such credit.   On or after the Closing, Seller will have no further 
obligations with respect to any Leases or other agreements affecting the 
Property, including, without limitation, tenant improvement work, leasing 
commissions and free rent.

                 8.2.1    Seller and Purchaser hereby agree to use their 
reasonable efforts to calculate prorations (including real estate tax 
prorations) so as to permit settlement thereof on the Closing Date, provided, 
however, that if any of such prorations cannot be calculated accurately on 
the Closing Date, then the same will be calculated as soon as reasonably 
practicable after the Closing Date, but in no event later than the later to 
occur of (i) thirty (30) days after Seller receives its final cost 
certification for the year in which Closing occurs, or (ii) March 31 of the 
year following the year in which Closing occurs, and either party owing the 
other party a sum of money based on such subsequent proration(s) shall 
promptly pay said sum to the other party, together with interest thereon at 
the rate of two percent (2%) per annum over the "prime rate" (as announced 
from time to time in the Wall Street Journal) from the Closing Date to the 
date of payment if payment is not made within thirty (30) days after delivery 
of a bill therefor together with reasonable back-up documentation.  This 
obligation of the parties will survive Closing.

          8.3    Proration of Service Charges.  To the extent Seller, as 
opposed to tenants, is responsible for payment of utility charges, Seller 
will attempt to have utility meters read as of the Closing Date.  To the 
extent that this is not possible and to the extent that any other obligation 
for continuing services is incurred, and statements are rendered for such 
services covering periods both before and after the Closing Date, the amount 
will be adjusted between the parties as of the Closing Date on a per-diem 
basis. Seller will forward any such statements

                                       11
<PAGE>

which it receives to Purchaser and Purchaser will pay the same.  Seller will 
remit to Purchaser its proportionate share immediately upon demand.

          8.4    Closing Costs.  Purchaser agrees to pay (i) the Title 
Insurer's escrow and/or closing fees (including any payment to the closing 
officer of the Title Insurer as may be the local custom at the Closing), (ii) 
the cost of the title commitment and basic policy and endorsements, if any, 
required to meet Seller's obligations hereunder and the cost of any 
endorsements to the title policy required by Purchaser, including extended 
coverage, (iii) all recording fees and taxes with respect to the Deed, (iv) 
all costs of Purchaser's physical inspections of the Property (environmental, 
engineering) and other due diligence activities; (v) all costs of survey, 
including fees and charges of Gannett Fleming Associates (originally engaged 
by Seller); (vi) cancellation charges, if applicable, to Coventry Abstract 
(originally engaged by Seller); and (vii) one-half (1/2) of applicable 
transfer taxes.  Seller agrees to pay (i) all recording fees with respect to 
clearing Seller's title, and (ii) one-half (1/2) of applicable transfer 
taxes. Except as otherwise provided in Paragraph 9.9, each party is 
responsible for its own attorneys' and other professional fees.  All other 
closing costs shall be allocated in accordance with the prevailing local 
custom.

          8.5    Possession.  Subject to the rights of tenants pursuant to 
Leases delivered to Purchaser, Seller will deliver possession of the Property 
and of any conveyed personal property to the Purchaser on the date of Closing 
and Seller will thereupon deliver to Purchaser the originals of all Leases, 
all correspondence with tenants, tenant/lease files, operating statements, 
plans and specifications, supplies and advertising materials, booklets, keys, 
and other items used in connection with operation of the Property.

          8.6    Seller's Closing Documents.  As part of the Closing, Seller 
will deliver to Purchaser:

                 8.6.1    the Deed, in the form of Schedule 8.6.1

                 8.6.2    an affidavit in customary form that Seller is not a 
foreign person within the meaning of Section 1445(e) of the Internal Revenue 
Code of 1986, in the form of Schedule 8.6.2;

                 8.6.3    such affidavits as are customarily required by 
Title Insurer in connection with issuance of the owner's basic title 
insurance policy, including a mechanics' lien and judgment affidavit;

                 8.6.4    an assignment of the Leases in the form of Schedule 
8.6.4 ("Lease Assignment");

                 8.6.5    an assignment of contracts and warranties in the 
form of Schedule 8.6.5 ("Contracts Assignment"), assigning to Purchaser all 
contracts listed on Schedule 5.1.5,

                                       12
<PAGE>


other than those designated by Purchaser for termination by notice to Seller 
not less than thirty (30) days prior to Closing;

                 8.6.6    an assignment of intangibles in the form of 
Schedule 8.6.6 ("Intangibles Assignment");

                 8.6.7    letters, in form to be supplied by Purchaser, to 
the tenants at the Property,  instructing the tenants to pay rent to 
Purchaser and to recognize Purchaser as landlord under their Leases;

                 8.6.8    a bill of sale conveying all personal property of 
Seller, if any, located at the Property and used in connection with the 
maintenance or operation thereof (specifically excluding furniture, fixtures 
and equipment owned by RREEF Management Company and located in the RREEF 
Management Company office), in the form of Schedule 8.6.8;

                 8.6.9    a rent roll, certified by Seller as being true and 
correct, to Seller's knowledge, as of the Closing Date, in the form 
previously delivered to Purchaser;

                 8.6.10   a "bring down certificate" stating that Seller's 
representations and warranties are true and correct as of the Closing Date, 
in the form of Schedule 8.6.10;

                 8.6.11   estoppel certificates as required by Paragraph 6.2 
herein; and

                 8.6.12   all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

          8.7    Purchaser's Closing Documents.  As part of the Closing, 
Purchaser will deliver to Seller:

                 8.7.1    good federal funds in an amount equal to the 
Purchase Price, less the Deposit and interest thereon and plus or minus 
prorations as provided herein and plus funds sufficient to pay Purchaser's 
closing costs hereunder;

                 8.7.2    such affidavits as are customarily required by 
Title Insurer in connection with issuance of the owner's title insurance 
policy;

                 8.7.3    executed counterpart of the Lease Assignment;

                 8.7.4    executed counterpart of the Contracts Assignment;

                 8.7.5    executed counterpart of the Intangibles Assignment;

                                       13
<PAGE>

                 8.7.6    all other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

          8.8    Joint Deliveries.  At the Closing, Seller and Purchaser will 
execute and deliver to each other the following documents in proper form:

                 8.8.1    Closing Statement;

                 8.8.2    City, county and state transfer tax declarations or 
similar instruments; and

                 8.8.3    All other documents, instruments or writings which 
may be reasonably required to consummate the transactions contemplated herein.

     9.   Miscellaneous.

          9.1    Modifications.  This Agreement can be amended only in 
writing signed by both of the parties.

          9.2    Casualty and Condemnation.  Seller agrees to keep its 
customary replacement cost insurance covering the Property in effect until 
the Closing.  If between the Effective Date and the Closing the improvements 
on the Property are destroyed or damaged to the extent that repairs cost in 
excess of $1,000,000 in the estimate of an architect or contractor selected 
by Seller and reasonably acceptable to Purchaser, or if condemnation 
proceedings are commenced against the Property, Purchaser may (i) terminate 
this Agreement or (ii) elect to accept the Property in its then condition, in 
which event Seller will pay or assign to Purchase at Closing all proceeds of 
insurance (plus the applicable deductible) or condemnation awards payable to 
Seller by reason of such damage or condemnation.  In the event Purchaser 
makes neither election by the earlier of (a) Closing or (b) ten (10) days 
after being advised of such casualty or condemnation, Purchaser will be 
deemed to have elected to accept the Property in its then condition.  In the 
event of any other damage to the Property, Seller may either repair the 
damage or give Purchaser a reduction in the Purchase Price equal to the cost 
of repairing such damage, as certified by an architect or contractor selected 
by Seller and reasonably acceptable to Purchaser.  In the event of any damage 
where Purchaser does not have the right to terminate and Seller elects to 
repair such damage, the Closing Date shall be delayed for the number of days 
required to repair the damage, which Seller agrees to do in accordance with 
all Laws and in a good and workmanlike manner.

          9.3    Time of Essence.  Time (including, without limitation, the 
date specified as the Closing Date) is of the essence of this Agreement.

          9.4    Notices.  All notices required or permitted hereunder must 
be in writing and shall be served on the parties at the following address:

                                       14
<PAGE>

          If to Purchaser:    Brandywine Realty Trust
                              Newtown Square Corporate Campus
                              16 Campus Blvd.
                              Suite 150
                              Newtown Square, PA 19073
                              Attn:    Gerard H. Sweeney, President & CEO
                                       Brad A. Molotsky, General Counsel
                              Facsimile: (610-325-5622)

          If to Seller:       RREEF USA FUND-I
                              c/o The RREEF Funds
                              875 N. Michigan Avenue
                              Suite 4100
                              Chicago, IL 60611
                              Attn: Mr. John Turney & Ms. Pamela Boneham
                              Facsimile: (312) 266-9346

          with a copy to:     RREEF USA FUND-I
                              c/o The RREEF Funds
                              650 Park Avenue
                              Suite 210
                              King of Prussia, PA 19406
                              Attn: Ms. Barbara Gillentine
                              Facsimile: (610) 337-2308

          and a copy to:      D'Ancona & Pflaum
                              30 North LaSalle Street
                              Suite 2900
                              Chicago, Illinois  60602
                              Attn: Lawrence J. Moss
                              Facsimile: (312) 580-0923

Any such notices may be sent by (a) certified mail, return receipt requested, 
in which case notice will be deemed delivered three (3) business days after 
deposit, postage prepaid in the U.S. mail or (b) a nationally recognized 
overnight courier, in which case notice will be deemed delivered one business 
day after deposit with such courier or (c) facsimile transmission, in which 
case notice will be deemed delivered upon electronic verification that 
transmission to recipient was completed, provided that notices sent by 
facsimile transmission on a day other than a business day, or before 9:00 
a.m. or after 5:00 p.m. recipient's time on a business day, shall be deemed 
given on the first business day following the date of transmission or (d) 
personal delivery.  The above addresses and facsimile numbers may be changed 
by notice to the other party; provided

                                       15
<PAGE>

that no notice of a change of address or facsimile number will be effective 
until actual receipt of such notice.

          9.5    Parties Bound.  Neither party may assign this Agreement 
without the prior written consent of the other, and any such prohibited 
assignment shall be void; provided that Purchaser may assign this Agreement 
without Seller's consent to an Affiliate; provided that the assignee is not a 
party-in-interest as described in Paragraph 9.14.  Subject to the foregoing, 
this Agreement is binding upon and inure to the benefit of the respective 
legal representatives, successors, assigns, heirs, and devisees of the 
parties.  For the purposes of this Paragraph, the term "Affiliate" means (a) 
an entity that directly or indirectly controls, is controlled by or is under 
common control with the Purchaser or (b) an entity at least a majority of 
whose economic interest is owned by Purchaser; and the term "control" means 
the power to direct the management of such entity through voting rights, 
ownership or contractual obligations.

          9.6    Governing Law.  The performance and interpretation of this 
Agreement is controlled by the law of the Commonwealth of Pennsylvania.

          9.7    Continuation Until Closing; Leasing.

                 9.7.1     Between the Effective Date and the Closing, Seller 
agrees to keep and perform all of the obligations to be performed by landlord 
under any Leases and Laws.  Seller agrees to operate the Property in the same 
manner as before the making of this Agreement, the same as though Seller were 
retaining the Property.  Seller agrees not to convey the Property, nor to 
grant any liens or easements with respect thereto.

                 9.7.2    Seller shall not permit or consent to any new 
leases, amendments, extensions, renewals (other than pursuant to tenant 
renewal options, if any) or subleases without first submitting them to 
Purchaser for Purchaser's approval on an approval form in the form attached 
hereto as Schedule 9.7.2, which approval shall not be unreasonably withheld. 
Purchaser shall have three (3) business days to notify Seller of its approval 
of such leases, amendments, extensions, renewals or subleases, and in the 
event that Purchaser does not so notify Seller, the leases, amendments, 
extensions, renewals or  subleases, as the case may be, shall be deemed 
approved.

                 9.7.3    With respect to any new lease or lease modification 
entered into by Seller after December 18, 1997 and approved by Purchaser, by 
the terms of which Seller obligates itself to perform or performs or pays or 
contracts for any tenant improvement work or additional landlord work 
required pursuant to such lease, or pays or contracts for any leasing 
commissions or grants any free rent period or other financial concessions, 
then such expenses and/or free rent or other concessions, and all other 
third-party costs incurred (including attorneys' fees) in connection with 
such lease, will be a credit to Seller at Closing to the extent Seller paid 
such amounts prior to Closing; otherwise Purchaser agrees to assume liability 
for the payment and performance of such obligations in accordance with the 
terms thereof.

                                       16
<PAGE>

          9.8    Brokers.  Seller and Purchaser each (i) represents and 
warrants to the other that it has not dealt with any broker or finder in 
connection with the transaction contemplated by this Agreement other than the 
parties, if any, to be paid a commission as specified in Paragraph 9.11, and 
(ii) agrees to defend, indemnify and hold the other harmless from and against 
any losses, damages, costs, or expenses (including attorneys' fees) incurred 
by such other party due to a breach of the foregoing warranty by the 
indemnifying party.

          9.9    Attorneys' Fees.  Notwithstanding any limitation on remedies 
or amounts recoverable set forth elsewhere herein, if any action is brought 
by either party against the other party, the party in whose favor final 
judgment is entered will be entitled to recover court costs incurred and 
reasonable attorneys' fees at trial, upon appeal and on any petition for 
review.

          9.10   Remedies for Non-Performance.  Purchaser's remedies 
regarding breach of warranty or representation by Seller are governed by 
Paragraph 5.3. In the event of any other default by Seller hereunder, 
Purchaser may, as its sole and exclusive remedy, either (i) terminate this 
Agreement and seek damages, subject to performance of Purchaser's indemnities 
set forth in Paragraph 9.15, and receive back the Deposit or (ii) seek 
specific performance.  If said sale is not consummated because of a default 
under this Agreement on the part of Purchaser, the Deposit will be paid to 
and retained by Seller as Seller's sole and exclusive remedy.  Seller and 
Purchaser acknowledge that the Deposit is a reasonable forecast of just 
compensation for the harm that could be caused by Purchaser's default and 
that the harm suffered by Seller is difficult or impossible to accurately 
ascertain or predict.  NOTWITHSTANDING ANY OTHER PROVISION OF THIS AGREEMENT 
TO THE CONTRARY, SELLER'S TOTAL LIABILITY FOR DAMAGES FOR BREACH OF THE 
COVENANTS, AGREEMENTS, WARRANTIES AND REPRESENTATIONS UNDER THIS AGREEMENT 
AND THE OTHER AGREEMENTS, COLLECTIVELY, SHALL NEVER EXCEED TWO MILLION 
DOLLARS ($2,000,000.00), AND IN NO EVENT SHALL SELLER BE LIABLE FOR SPECIAL, 
EXEMPLARY, CONSEQUENTIAL OR PUNITIVE DAMAGES.

          9.11   Brokers Commission.  Seller agrees to pay the brokerage 
commission due The Flynn Company pursuant to a separate agreement.

          9.12   Survival of Covenants.  All covenants hereunder which, by 
their terms, are intended to survive Closing will survive Closing hereunder.

          9.13   Seller's Investment Committee Approval. This condition has 
been satisfied.

          9.14   ERISA.  Purchaser represents and warrants to Seller that 
none of Purchaser's assets are "plan assets," (as that term is defined by 29 
CFR Section 2510.3-101) because all plans that are subject to the provisions 
of the Employee Retirement Income Security Act of 1974,

                                       17
<PAGE>

as amended, and which have invested in Purchaser hold only "equity 
interests," (as that term is defined by 29 CFR Section 2510.3-101(b)(1)) that 
are "publicly-offered securities," (as that term is defined by 29 CFR Section 
2510.3-101(b)(2)).  Purchaser further represents and warrants to Seller that 
it is not any one of the types of entities listed in 29 CFR Section 
2510.3-101(h), the character of which would identify its assets as "plan 
assets."

          9.15   Entry and Indemnity.  In connection with any entry by 
Purchaser, or its agents, employees or contractors onto the Property, 
Purchaser shall give Seller reasonable advance notice of such entry and shall 
conduct such entry and any inspections in connection therewith so as to 
minimize, to the greatest extent possible, interference with Seller's 
business and the business of Seller's tenants and otherwise in a manner 
reasonably acceptable to Seller.  Without limiting the foregoing, prior to 
any entry to perform any on-site testing, Purchaser shall give Seller notice 
thereof, including the identity of the company or persons who will perform 
such testing and the proposed scope of the testing.  Seller shall approve or 
disapprove the scope and methodology of such proposed testing within three 
(3) business days after receipt of such notice, such approval to be within 
the sole and unfettered discretion of Seller; Seller's failure to notify 
Purchaser of its approval or disapproval shall be deemed to be Seller's 
disapproval thereof. If Purchaser or its agents, employees or contractors 
take any sample from the Property in connection with any such approved 
testing, upon Seller's request, Purchaser shall provide to Seller a portion 
of such sample being tested to allow Seller, if it so chooses, to perform its 
own testing.  Seller or its representative may be present to observe any 
testing or other inspection performed on the Property.  Upon Seller's 
request, Purchaser shall promptly deliver to Seller copies of any reports 
relating to any testing or other inspection of the Property performed by 
Purchaser or its agents, employees or contractors.  Purchaser shall maintain, 
and shall assure that its contractors maintain, public liability and property 
damage insurance in amounts and in form and substance adequate to insure 
against all liability of Purchaser, its agents, employees or contractors, 
arising out of any entry or inspections of the Property pursuant to the 
provisions hereof, and Purchaser shall provide Seller with evidence of such 
insurance coverage upon request by Seller. Purchaser shall indemnify, defend 
and hold Seller harmless from and against any costs, damages, liabilities, 
losses, expenses, liens or claims (including, without limitation, reasonable 
attorney's fees) arising out of or relating to any entry on the Property by 
Purchaser, its agents, employees or contractors in the course of performing 
the inspections, testings or inquiries provided for in this Agreement, 
including without limitation damage to the Property or release of hazardous 
substances or materials onto the Property, excluding, however, any costs 
incurred by Seller in supervising Purchaser's testing.  The foregoing 
indemnity shall survive beyond the Closing, or if the sale is not 
consummated, beyond the termination of this Agreement.

          9.16   Release.  Except to the extent of the representations and 
warranties of Seller expressly set forth in this Agreement, and except to the 
extent of a breach by Seller of applicable laws, but otherwise 
notwithstanding any other provision of this Agreement to the contrary, 
Purchaser, on behalf of itself and its successors and assigns, waives its 
right to recover from, and forever releases and discharges, Seller, Seller's 
affiliates, Seller's investment manager, the partners, trustees, 
shareholders, directors, officers, employees and agents of each of them,

                                       18
<PAGE>

and their respective heirs, successors, personal representatives and assigns 
(collectively, the "Seller Related Parties"), from any and all demands, 
claims, legal or administrative proceedings, losses, liabilities, damages, 
penalties, fines, liens, judgments, costs or expenses whatsoever (including, 
without limitation, attorneys' fees and costs), whether direct or indirect, 
known or unknown, foreseen or unforeseen, which may arise on account of or in 
any way be connected with the physical condition of the Property or any law 
or regulation applicable thereto, including, without limitation, the 
Comprehensive Environmental Response, Compensation and Liability Act of 1980, 
as amended (42 U.S.C. Sections 9601 et seq.), the Resources Conservation and 
Recovery Act of 1976 (42 U.S.C. Section 6901 et seq.), the Clean Water Act 
(33 U.S.C. Section 466 et seq.), the Safe Drinking Water Act (14 U.S.C. 
Sections 1401-1450), the Hazardous Materials Transportation Act (49 U.S.C. 
Section 1801 et seq.), and the Toxic Substance Control Act (15 U.S.C. 
Sections 2601-2629)

          9.17   Confidential Information.  The parties acknowledge that the 
transaction described herein is of a confidential nature and shall not be 
disclosed except to consultants, investors,  advisors, and affiliates, or as 
required by law.  No party will make any public disclosure of the specific 
terms of this Agreement, except as required by law.  Without limiting the 
generality of the foregoing, any press release or other public disclosure 
regarding this Agreement or the transactions contemplated herein, and the 
wording of same, must be approved in advance by both parties.  In connection 
with the negotiation of this Agreement and the preparation for the 
consummation of the transactions contemplated hereby, each party acknowledges 
that it will have access to confidential information relating to the other 
party.  Each party shall treat such information as confidential, preserve the 
confidentiality thereof, and not duplicate or use such information, except to 
advisors, consultants, investors and affiliates in connection with the 
transactions contemplated hereby.  In the event of the termination of this 
Agreement for any reason whatsoever, Purchaser will return to Seller, at 
Seller's request, all documents, work papers, and other material (including 
all copies thereof) obtained from Seller in connection with the transactions 
contemplated hereby, and each party shall use its best efforts, including 
instructing its employees and others who have had access to such information, 
to keep confidential and not to use any such information.  The provisions of 
this Paragraph 9.17 will survive the Closing or, if the purchase and sale is 
not consummated, any termination of this Agreement.

          9.18   Calculation of Time Periods.  Unless otherwise specified, in 
computing any period of time described herein, the day of the act or event, 
after which the designated period of time begins to run, is not to be 
included and the last day of the period so computed is to be included, unless 
such last day is a Saturday, Sunday or legal holiday, in which event the 
period shall run until the end of the next day which is neither a Saturday, 
Sunday, or legal holiday (i.e., a day on which federally chartered banks are 
not open for business in Chicago, Illinois).  The last day of any period of 
time described herein shall be deemed to end at 5 p.m. Chicago, Illinois time 
on the last day of such period of time. All days other than Saturdays, 
Sundays and legal holidays in which national banks are closed in Chicago, 
Illinois are business days hereunder.

                                       19
<PAGE>

          9.19   Entire Agreement.  This Agreement and any other document to 
be furnished pursuant to the provisions hereof embody the entire agreement 
and understanding of the parties hereto as to the subject matter contained 
herein. There are no restrictions, promises, representations, warranties, 
covenants, or undertakings other than those expressly set forth or referred 
to in such documents.  This Agreement and such documents supersede all prior 
agreements and understandings among the parties with respect to the subject 
matter hereof

          9.20   Severability.  Any term or provision of this Agreement that 
is invalid or unenforceable in any jurisdiction will, as to such 
jurisdiction, be ineffective to the extent of such invalidity or 
unenforceability without rendering invalid or unenforceable the remaining 
terms and provisions of this Agreement, or affecting the validity or 
enforceability of any of the terms or provisions of this Agreement.

          9.21   Facsimile Signatures.  Executed facsimile copies of this 
Agreement or any amendments hereto shall be binding upon the parties, and 
facsimile signatures appearing hereon or on any amendments hereto shall be 
deemed to be original signatures.

          9.22   Further Assurances.  In addition to the acts and deeds 
recited herein and contemplated to be performed, executed and/or delivered by 
Seller to Purchaser at Closing, Seller agrees to perform, execute and 
deliver, but without any obligation to incur any additional liability or 
expense, on or after the Closing any further deliveries and assurances as may 
be reasonably necessary to consummate the transactions contemplated hereby or 
to further perfect the conveyance, transfer and assignment of the Property to 
Purchaser.

          9.23   Offer.  Execution and delivery of this Agreement by 
Purchaser constitutes an offer to purchase the Property on the terms 
contained herein. Delivery by Seller of a copy of  the fully executed 
Agreement by facsimile transmission on or before the Expiration Date, 
followed by a manually signed copy thereof delivered the next business day 
after transmission of such copy, shall constitute acceptance by Seller as of 
the date of the facsimile transmission. The date on which Seller delivers a 
fully executed copy of this Agreement to Purchaser, or delivers a copy by 
facsimile transmission followed by a manually signed copy as provided in the 
preceding sentence is referred to herein as the "Effective Date."

          9.24   Seller Exculpation Clause.  The obligations of Seller 
contained herein are intended to be binding only on the property of the trust 
party to this Agreement of Purchase and Sale and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the trustees, investment managers, any general partners thereof, or any 
employees or agents of the trustees or investment managers.  All documents to 
be executed by Seller shall also contain the foregoing exculpation.

                                       20
<PAGE>

          9.25   Purchaser Exculpation Clause.  No recourse shall be had for 
any obligation of Brandywine Operating Partnership, L.P. and Brandywine 
Realty Trust under this Agreement or under any document executed in 
connection herewith or pursuant hereto, or for any claim based thereon or 
otherwise in respect thereof, against any past, present or future trustee, 
shareholder, officer or employee of Brandywine Operating Partnership, L.P. or 
Brandywine Realty Trust, whether by virtue of any statute or rule of law, or 
by the enforcement of any assessment or penalty or otherwise, all such 
liability being expressly waived and released by the Seller and all parties 
claiming by, through or under Seller.

          9.26   SEC Reporting (8-K) Requirements.  For the period of time 
commencing on the date hereof and continuing through the first anniversary of 
the Closing Date, and without limitation of other document production 
otherwise required of Seller hereunder, Seller shall, from time to time, upon 
reasonable advance written notice from Purchaser, provide Purchaser and its 
representatives, with (a) access to all financial information pertaining to 
the period of Seller's ownership and operation of the Property, which 
information is relevant and reasonably necessary, in the opinion of 
Purchaser's outside, third party accountants (the "Accountants"), to enable 
Purchaser and its Accountants to prepare financial statements in compliance 
with any or all of (i) Rule 3-05 or 3-15 of Regulation S-X of the Securities 
and Exchange Commission (the "Commission"), as applicable; (ii) any other 
rule issued by the Commission and applicable to Purchaser; and (iii) any 
registration statement, report or disclosure statement filed with the 
Commission, by, or on behalf of Purchaser; and (b) a representation letter, 
signed by the

                                       21 

<PAGE>

individual(s) responsible for Seller's financial reporting, substantially in 
the form of Schedule 9.26 attached hereto, which representation letter may be 
required by the Accountants in order to render an opinion concerning Seller's 
financial statements.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the dates set forth below.

SELLER:                                PURCHASER:                           
                                                                            
RREEF USA FUND-I                       BRANDYWINE OPERATING PARTNERSHIP,    
                                       L.P.                                 
                                                                            
By:  RREEF America L.L.C., its         By:  Brandywine Realty Trust, its    
     investment advisor                     authorized general partner      
                                                                            
                                                                            
By:                                    By:                                  
   ----------------------------           -------------------------------   
     Authorized Representative              Gerard H. Sweeney               
                                            President and Chief Executive   
Dated:                                      Officer                         
      -------------------------        Dated:                               
                                             ----------------------------   

                                       22
<PAGE>

                         List of Schedules and Exhibits

Schedules
- ------------

2.1                           Escrow Instructions
5.1                           Disclosure Schedule
5.1.5                         Service Contracts
5.1.10                        Rent Roll
5.1.12                        Future Leasing Commissions, Tenant Improvements
                              and Free Rent
6.2                           Form of Estoppel Letter
8.6.1                         Form of Deed
8.6.2                         FIRPTA Certificate
8.6.4                         Assignment and Assumption of Leases
8.6.5                         Assignment and Assumption of Contracts and
                               Warranties
8.6.6                         Assignment of Intangibles
8.6.8                         Bill of Sale
8.6.10                        Bring-Down Certificate
9.26                          SEC Compliance Representation Letter

Exhibits
- --------------

A                             Legal Description of Property
A-1                           Descriptive List of the Property

                                       23
<PAGE>


                                  Schedule 2.1

                       EARNEST MONEY ESCROW INSTRUCTIONS


            (earnest money escrow instructions previously executed)


<PAGE>

                                  Schedule 5.1

                              DISCLOSURE SCHEDULE

     1.   The Upper Merion Area school district has filed real estate tax 
          assessment appeals, seeking to increase the assessments against the 
          660 Allendale Road and 680 Allendale Road properties for tax years 
          beginning on and after January 1, 1996.  Counsel for Seller has 
          negotiated a tentative settlement, whereby the School District 
          would dismiss its appeals, and the 1998 reassessment for 660 
          Allendale would be increased from $3,566,070 to $4,200,000.  
          Purchaser hereby concurs with this settlement, and authorizes 
          Seller to authorize its counsel to proceed to attempt to put this 
          proposed settlement into effect.

     2.   1996 Environmental Audits were prepared by ATC Environmental, Inc. 
          for the following properties:

                 1.       600 Park Avenue
                 2.       650 Park Avenue
                 3.       875 First Avenue
                 4.       630 Clark Avenue
                 5.       650 Clark Avenue
                 6.       620 Allendale Road
                 7.       640-660 Allendale Road
                 8.       680 Allendale Road
                 9.       741 Third Avenue
                 10.      820 Third Avenue
                 11.      780 Third Avenue
                 12.      751-761 Fifth Avenue

          These Audits have been made available to Purchaser for inspection 
          and copying, and, each of the Seller warranties of Section 5.1.8 
          and its subparagraphs are qualified and limited by any matters 
          disclosed in such Audits.

<PAGE>

                                 Schedule 5.1.5

                               Service Contracts

A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING

<PAGE>

                                Schedule 5.1.10

                                   Rent Roll

<PAGE>

                                Schedule 5.1.12

         Future Leasing Commissions, Tenant Improvements and Free Rent


1.   If Lockheed Martin, the tenant of 751-761 Fifth Avenue, does not 
     exercise its termination option, a commission may become due to The 
     Flynn Company and GMH in the aggregate amount of $44,388.00 on October 
     1, 2000.

2.   Seller and Gannett Fleming (650 Park Avenue) have signed a letter of 
     intent to extend its lease for seven years and expand to approximately 
     35,000 square feet.  The extended lease would commence July 1, 1998 or 
     sooner.  Base rent is $16.00 gross plus electric, with escalation over 
     1997 base year and 3% annual increases in base rent.  Tenant will be 
     entitled to a tenant improvement allowance of $15.00 per square foot, 
     and a leasing commission in the amount of $____________ will be payable 
     to _____________.

3.   Wacker Siltronic Corp. (650 Park Avenue, 1,072 square feet) is extending 
     its lease.  A commission in the amount of $1,326 will be payable to The 
     Flynn Company.

4.   The landlord has agreed to pay Metropolitan Fiber Systems of 
     Philadelphia, Inc. (MFS) (630 Clark Avenue) up to $450,000 for tenant 
     improvements and roof repairs/replacements.  The work has been performed 
     but the landlord has not yet been billed.  This remains a Seller 
     obligation, and Seller agrees to hold Purchaser from and against any 
     liability for these amounts, such obligation to survive Closing.

<PAGE>

                                  Schedule 6.2

                             TENANT ESTOPPEL LETTER


                                                      __________ __, 1998
 


Brandywine Realty Trust
Newtown Square Corporate Campus
16 Campus Boulevard
Newtown Square, PA  19073

Attention:  Gerard H. Sweeney,
     President and Chief Executive Officer


NationsBank, N.A.,
Real Estate Banking
8300 Greensboro Drive, Suite 300
McLean, VA 22102

Attention: Gary P.F. Carr

                 Re:      Lease from ________, for Suite ____, located at
                          [BUILDING ADDRESS]
                          [CITY/TOWNSHIP], Pennsylvania (the "Property")

To Whom it May Concern:

     The undersigned is the holder of the tenant's interest under the lease 
described on Exhibit A attached hereto (the "Lease") demising a portion of 
the Property (the "Leased Premises").  We understand that Brandywine Realty 
Trust, its assignee or nominee ("Brandywine") intends to acquire the 
Property, and that NationsBank, N.A., as Agent for the parties listed on 
Schedule 1 attached hereto ("Lender") may be the holder of a first mortgage 
on the Property, and that Brandywine and Lender require this certification 
from us.

     Accordingly, we hereby certify to Brandywine and Lender as follows:

     1.   The Lease is in full force and effect and has not been modified, 
amended or supplemented in any way, except as follows (Insert dates of all 
modifications, amendments, or supplements; if none, write "None"): 
___________________________________________________________________________
__________________________________.


<PAGE>

     2.     There are no other representations, warranties, agreements,
concessions, commitments, or other understandings between the undersigned and
the Landlord regarding the Property other than as set forth in the Lease or
paragraph 1 above.

     3.     The landlord under the Lease has completed and delivered, and the 
undersigned has accepted, the Leased Premises in the condition required by 
the Lease and the term of the Lease commenced on _________.  The Leased 
Premises consists of approximately ___________ square feet.  The undersigned 
has taken possession of and is occupying the Leased Premises on a rent-paying 
basis and the monthly base rent payable thereunder is $_________, payable in 
advance. All improvements and work required under the Lease to be made by the 
landlord thereunder and all facilities required under the Lease to be 
furnished to the Leased Premises have been completed to the satisfaction of 
the undersigned, except as follows (Insert description of any improvements 
and work to be completed by the landlord under the Lease; if none, write 
"None"): _____________________________.

     4.     The fixed expiration date set forth in the Lease, excluding 
renewals and extensions, is ________________.  The undersigned neither has 
any option or right to purchase the Property or any portion thereof nor does 
the undersigned have any right or option to terminate the Lease or any of its 
obligations thereunder in advance of the scheduled termination date of the 
Lease as noted above, except as follows (Insert description of any purchase 
rights or options, and/or any early termination rights; if none, write 
"None"): _______________________________.

     5.  All rents, additional rents and other sums due and payable under the 
Lease have been paid in full and no rents, additional rents or other sums 
payable under the Lease have been paid for more than one (1) month in advance 
of the due dates thereof.

     6.  The landlord under the Lease is not in default under any of the 
requirements, provisions, terms, conditions or covenants of the Lease to be 
performed or complied with by the landlord under the Lease, and no event has 
occurred or situation exists which would, with the passage of time and/or the 
giving of notice, constitute a default or an event of default by the landlord 
under the Lease.

     7.  The undersigned is not in default under any of the requirements, 
provisions, terms, conditions, or covenants of the Lease to be performed or 
complied with by the undersigned, and no event has occurred or situation 
exists which would, with the passage of time and/or the giving of notice, 
constitute a default or an event of default by the undersigned under the 
Lease.

                                       2
<PAGE>


     8.   The undersigned has received no notice from any governmental 
authority or other person or party claiming a violation of, or requiring 
compliance with, any Federal, State or local statute, ordinance, rule, 
regulation or other requirement of law, for environmental contamination at 
the Leased Premises, to the best knowledge of the undersigned no hazardous, 
toxic or polluting substances or wastes have been generated, treated, 
manufactured, stored, refined, used, handled, transported, released, spilled, 
disposed of or deposited by Tenant on, in or under the Leased Premises.

     9.  Neither the undersigned nor the landlord under the Lease has 
commenced any action or given or received any notice for the purpose of 
terminating the Lease.

     10.  There are no existing defenses, offsets, claims, or credits against 
the payment of rent or the performance of the undersigned's obligations under 
the Lease.

     11.  The undersigned has paid to the landlord under the Lease a security 
deposit of $____________.

                                   Very truly yours,




                                   By:
                                        --------------------------------------
                                        Name:
                                        Title:

                                       3
<PAGE>

                                   Exhibit A
                            (Description of Lease)


                                       4
<PAGE>


                                 Schedule 8.6.1

                                  Form of Deed

SPECIAL WARRANTY DEED:

THIS INDENTURE made this ____ day of ____________ , 1998,

BETWEEN   RREEF USA FUND-I, A CALIFORNIA GROUP TRUST
                    (hereinafter called the Grantor/s), of the one part and

          _____________________
                    (hereinafter called the Grantee/s), of the second part,

WITNESSETH That in consideration of Ten and No/100 Dollars ($10.00) in hand 
paid, the receipt whereof is hereby acknowledged, the said Grantor/s do/does 
hereby grant, bargain, sell and convey unto the said Grantee/s, his/her/their 
successors and /or assigns,

ALL THAT CERTAIN real estate, situated in the County of Montgomery and 
Commonwealth of Pennsylvania known and described on the attached Exhibit A 
"Legal Description," attached hereto an hereby made a part hereof.

TOGETHER with all and singular the buildings, improvements, ways, streets, 
alleys, driveways, passages, waters, water-courses, rights, liberties, 
privileges, hereditaments and appurtenances whatsoever unto the hereby 
granted premises belonging, or in anywise appertaining, and the reversions 
and remainders, rents, issues and profits thereof; and all the estate, right, 
title, interest, use, trust, property, possession, claim and demand 
whatsoever of Grantor as well at law as in equity, of, in, and to the same.

TO HAVE AND TO HOLD the said lot or piece of ground described with the 
buildings and improvements thereon erected, hereditaments and premises hereby 
granted, or mentioned and intended so to be, with the appurtenances unto the 
said Grantee, and its successors and assigns to and for the only proper use 
and behoof of the said Grantee, and its successors and assigns, forever.

AND the said Grantor/s do/does hereby covenant to and with the said Grantee/s 
that he/she/they, the said Grantor/s, his/her/their successors and/or 
assigns, SHALL AND WILL warrant specially and forever defend the herein above 
described premises, with the hereditaments and appurtenances, unto the said 
Grantor/s and against every other person lawfully claiming or who shall 
hereafter claim the same or any part thereof, by, from and under 
his/her/their successors and/or assigns or any of them, subject to validly 
and legally existing encumbrances of record.

IN WITNESS WHEREOF, the said Grantor/s has/have caused these presents to be 
duly executed, the day and year first above written.

<PAGE>

ATTEST:

                                                 
                                                 RREEF USA FUND-I, a California
                                                 group trust                   
By:                                                                            
   -------------------------------               By:  RREEF America L.L.C., a  
                                                      Delaware limited 
                                                      liability company, its
                                                      investment advisor     



                                                   By:
                                                      -------------------------
                                                     Authorized Representative

[Add Pennsylvania address certification]

                                       2
<PAGE>

STATE OF                      )
          ----------------
                              )    SS.
COUNTY OF                     )
          ----------------

     I, ____________________________________________________________, a 
notary public in and for said County, in the State aforesaid, DO HEREBY 
CERTIFY that _______________________ and _______________________________, 
personally known to me to be the __________________________ and __________ of 
RREEF USA FUND-I, a California group trust, and personally known to me to be 
the same persons whose names are subscribed to the foregoing instrument, 
appeared before me this day in person and acknowledged that as such 
_____________________________ and __________, they signed and delivered the 
said instrument as their free and voluntary act, and as the free and 
voluntary act and deed of said trust, for the uses and purposes therein set 
forth.

     GIVEN under my hand and official seal this ____ day of ___________, 1998.



                                   -------------------------------------------
                                                  Notary Public


Commission expires
                  ------------------------------------------------------------




                                       3
<PAGE>

                                   EXHIBIT A


                               Legal Description


<PAGE>

                                 Schedule 8.6.2

                               FIRPTA CERTIFICATE

     Section 1445 of the Internal Revenue Code provides that a transferee of 
a U.S. real property interest must withhold tax if the transferor is a 
foreign person.  To inform the transferee that withholding of tax is not 
required upon the disposition of a U.S. real property interest by 
__________________________________________, a _______________________ 
("Seller") hereby certifies the following:

1.   Seller is not a foreign corporation, foreign partnership, foreign trust
     or foreign estate (as those terms are defined in the Internal Revenue
     Code and Income Tax Regulations);

2.   Seller's U.S. employer identification number is 94-2624868; and

3.   Seller's principal place of business is 101 California Street, 26th
     floor, San Francisco, CA 94111-5853

     Seller understands that this certification may be disclosed to the
Internal Revenue Service by transferee and that any false statement contained
herein could be punished by fine, imprisonment, or both.

     Under penalties of perjury I declare that I have examined this
certification and to the best of my knowledge and belief it is true, correct
and complete, and I further declare that I have authority to sign this
document on behalf of Seller. 
                                  _______________________________________

                                  _______________________________________



                                  By:
                                      ------------------------------------
                                        Authorized Representative
 
Subscribed and sworn to
before me this ____ day of
______, 1998.



- ------------------------------
Notary Public

<PAGE>

                                 Schedule 8.6.4

                      ASSIGNMENT AND ASSUMPTION OF LEASES


          THIS ASSIGNMENT AND ASSUMPTION OF LEASES (the "Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is between 
_________________________________________, a Delaware corporation, 
("Assignor") and ________________, a ___________________ ("Assignee").

     A.   Assignor is the lessor under certain leases executed with respect 
to that certain real property and improvements thereon known 
as_________________________________, _______________________, and more 
particularly described in Exhibit "A" attached hereto (the "Property"), which 
leases are described in Exhibit B attached hereto (the "Leases").

     B.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase the Property from Assignor and 
Assignor agreed to sell the Property to Assignee, on the terms and conditions 
contained therein.

     C.   Assignor desires to assign its interest as lessor in the Leases to 
Assignee, and Assignee desires to accept the assignment thereof, on the terms 
and conditions below.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance Date") 
[SHOULD BE THE DAY FOLLOWING CLOSING], Assignor hereby assigns to Assignee 
all of its right, title, and interest in and to the Leases except rents and 
other sums due Assignor first accruing on or prior to the Conveyance Date, 
and, effective as of the day following the Conveyance Date,  Assignee hereby 
accepts such assignment.

     2.   Assignor hereby assumes full responsibility for all obligations and 
defaults of landlord under the Leases accruing prior to and including the 
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee 
harmless from any claims, liabilities or costs (including reasonable 
attorneys' fees) arising from Assignor's failure to perform said obligations, 
provided that Assignee makes a claim hereunder on or before one (1) year 
following the Conveyance Date.

     3.   Assignee hereby assumes full responsibility for all obligations of 
landlord under the Leases accruing after the Conveyance Date and Assignee 
hereby agrees to defend, indemnify and hold Assignor harmless from any 
claims, liabilities or costs (including reasonable attorneys' fees) arising 
from Assignee's failure to perform said obligations.  Without limiting the 
generality

<PAGE>

of the foregoing, Assignee assumes full responsibility for the free rent, 
unpaid tenant improvement allowances and leasing commissions under the Leases 
as listed on Exhibit C.

     4.   This Assignment shall be governed by the laws of the Commonwealth 
of Pennsylvania.

     5.   This Assignment may be executed in counterparts.

     6.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers.

    IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment 
and Assumption of Leases.

ASSIGNOR:                                 ASSIGNEE:                          
                                                                             
__________________________________        __________________________________ 

__________________________________        __________________________________ 
                                                                             
                                                                             
By:                                       By:                                
   -------------------------------           ------------------------------- 
     Authorized Representative                                               
                                          Title:                             
                                                ---------------------------- 
Dated:                                    Dated:                             
      ----------------------------              ---------------------------- 

                                       2
<PAGE>

                                   EXHIBIT A

                               Legal Description



                                       3
<PAGE>

                                   EXHIBIT B

                                Existing Leases

                           (rent roll to be attached)


                                       4
<PAGE>

                                   EXHIBIT C

        Free Rent, Tenant Improvement Allowances and Leasing Commissions


                                       5
<PAGE>

                                 Schedule 8.6.5

             ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES

          THIS ASSIGNMENT AND ASSUMPTION OF CONTRACTS AND WARRANTIES (the 
"Assignment") dated as the dates of execution set forth below, but effective 
as of the Conveyance Date (as herein defined), is between 
____________________ ___________________________________, ("Assignor") and 
________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a 
condition precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance 
Date")[SHOULD BE THE DAY FOLLOWING CLOSING] , Assignor hereby assigns to 
Assignee all of its right, title, and interest in and to the following:

     2.   Assignor hereby grants, transfers and assigns to Assignee all the 
right, title and interest of Assignor in and to the following:

          (a) All contracts listed on Exhibit B attached hereto.

          (b) All presently effective and assignable warranties, guaranties, 
representations or covenants given to or made in favor of Assignor or 
Assignor's affiliates in connection with the acquisition, development, 
construction, maintenance, repair, renovation or inspection of the Property.

     The foregoing are collectively referred to herein as the "Contracts."

     3.   Assignor hereby assumes full responsibility for all obligations and 
defaults of Assignor under the Contracts accruing to and including the 
Conveyance Date.  Assignor also agrees to defend, indemnify and hold Assignee 
harmless from any claims, liabilities or costs (including reasonable 
attorneys' fees) arising from Assignor's failure to perform said obligations, 
provided that Assignee makes a claim hereunder on or before one (1) year 
following the Conveyance Date.

<PAGE>

     4.   Assignee hereby assumes full responsibility for all obligations of 
owner of the Property under the Contracts accruing after the Conveyance Date 
and Assignee hereby agrees to defend, indemnify and hold Assignor harmless 
from any claims, liabilities or costs (including reasonable attorneys' fees) 
arising from Assignee's failure to perform said obligations.

     5.   This Assignment shall be governed by the laws of the Commonwealth 
of Pennsylvania.

     6.   This Assignment may be executed in counterparts.

     7.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers.

      IN WITNESS WHEREOF, Assignor and Assignee have executed this Assignment 
and Assumption of Contracts and Warranties.
 
ASSIGNOR:                                 ASSIGNEE:                           
                                                                              
_____________________________             ______________________________      
_____________________________             ______________________________      
                                                                              
                                                                              
By:                                       By:                                 
    ---------------------------------        -------------------------------- 
                                                                              
     Authorized Representative            Title:                              
                                             -------------------------------- 

Dated:                                    Dated: 
       ------------------------------        --------------------------------


                                       2
<PAGE>

                                   EXHIBIT A

                               Legal Description



                                       3
<PAGE>

                                   EXHIBIT B
                                  -----------

                                   Contracts


A.T. BUILDERS
BFI
BERWYN GLASS
BOYLE ELECTRICAL CONTRACTORS
BURHANS GLASS COMPANY, INC.
CONTROLLED ENVIRONMENTS
CROWN CONTRACTORS, INC.
JOSEPH W. DAVIS, INC.
DIROCCO BROTHERS COMPANY
DURASEAL, INC.
ELDREDGE
FIDELITY ALARM COMPANY
GALLAGHER EXCAVATING, INC.  (GEI)
GUARDIAN ALARM SYSTEMS
HONEYWELL
MOON LANDSCAPING
OLIVER SPRINKLER
PENNTEX  CONSTRUCTION COMPANY
PHOENIX MECHANICAL, INC.
RHETT HAMILTON JONES ASSOCIATES
SANTANGELO HAULING CO.
SECURITY ELEVATOR COMPANY
SYSTEMATIC ROOFING ANALYSIS
TELEPHONE DIAGNOSTIC SERVICES, INC.
TERMINIX INTERNATIONAL CO.
VECTORDYNE
DAVID WHITE PLUMBING


                                       4
<PAGE>

                                 Schedule 8.6.6

                           ASSIGNMENT OF INTANGIBLES

          THIS ASSIGNMENT AND ASSUMPTION OF INTANGIBLES ("Assignment") dated 
as the dates of execution set forth below, but effective as of the Conveyance 
Date (as herein defined), is 
between____________________________________________________________, 
("Assignor") and ________________, a ___________________ ("Assignee").

     A.   Assignor and Assignee have entered into an Agreement of Purchase 
and Sale with an Effective Date of ______________, 1998 (the "Agreement"), 
pursuant to which Assignee agreed to purchase Assignor's interest in the real 
property legally described on Exhibit A attached hereto (the "Property"), on 
the terms and conditions contained therein.

     B.   Whereas the execution and delivery of this Assignment is a 
condition precedent to the purchase of the Property by the Assignee.

     ACCORDINGLY, the parties hereby agree as follows:

     1.   As of the date on which the Property is conveyed to Assignee 
pursuant to the Agreement (the "Conveyance 
Date")[SHOULD BE THE DAY FOLLOWING CLOSING], Assignor hereby assigns to 
Assignee all of its right, title, and interest in and to the following:

          (i)  All licenses, permits, certificates of occupancy, approvals,
     dedications, subdivision maps or plats and entitlements issued, approved
     or granted by federal, state or municipal authorities or otherwise in
     connection with the Property and its renovation, construction, use,
     maintenance, repair, leasing and operation; and all licenses, consents,
     easements, rights of way and approvals required from private parties to
     make use of utilities, to insure pedestrian ingress and egress to the
     Property and to insure continued use of any vaults under public
     rights-of-way presently used in the operation of the Property.

          (ii)  any trade style or trade name used in connection with the
     Property; and,

          (iii)  all correspondence with the tenants under tenant leases, all
     booklets and manuals relating to the maintenance and operation of the
     Property.

     The foregoing are collectively referred to herein as the "Intangibles".

     2.   Assignor agrees to assume full responsibility for its obligations
under the Intangibles accruing on or prior to the Conveyance Date  and
Assignor agrees to defend, indemnify and hold Assignee harmless from any
claims, liabilities or costs arising from

<PAGE>

Assignor's failure to perform said obligations, provided that Assignee makes 
a claim hereunder on or before one (1) year following the Conveyance Date.

     3.   Assignee assumes full responsibility for all obligations of the 
owner of the property accruing under the Intangibles from the day after the 
Conveyance Date  and Assignee agrees to defend, indemnify and hold Assignor 
and its predecessors in title harmless from all claims, liabilities or costs 
arising from Assignee's failure to perform said obligations.

     4.   This instrument may be executed in counterparts.

     5.   The obligations of Assignor contained herein are intended to be 
binding only on the property of the Assignor and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Assignor, or any general partners thereof, or 
any employees or agents of the  investment managers

     IN WITNESS WHEREOF, the parties have executed this Assignment of
Intangibles.


ASSIGNOR:                               ASSIGNEE:                           
                                                                            
_____________________________           ________________________________    
_________________________________,      ________________________________    
                                                                            
                                                                            
By:                                     By:                                 
   --------------------------------        -------------------------------- 
     Authorized Representative                                              
                                        Title:                              
                                           -------------------------------- 

Dated:                                  Dated:                              
   --------------------------------        -------------------------------- 
                                        


                                      2
<PAGE>

                                   EXHIBIT A

                               Legal Description



                                       3
<PAGE>

                                 Schedule 8.6.8

                                  BILL OF SALE


     _________________________________________________________________ 
("Seller"), in consideration of Ten and No/100 Dollars and other good and 
valuable consideration, the receipt and sufficiency of which is hereby 
acknowledged, hereby sells, transfers, assigns and sets over unto 
__________________ ("Purchaser"), all of its right, title and interest in and 
to any and all personal property, which personal property is owned by Seller 
and located on the real estate legally described on Exhibit A attached hereto 
(the "Personal Property"), including, but not limited to, the Personal 
Property listed on Exhibit B.

     Seller hereby represents and warrants to Purchaser that Seller is the 
absolute owner of the Personal Property free and clear of all liens, charges 
and encumbrances, and that Seller has full right, power and authority to sell 
the Personal Property and to make this Bill of Sale. All warranties of 
quality, fitness and merchantability are hereby excluded.

     The obligations of Seller contained herein are intended to be binding 
only on the property of the Seller and shall not be personally binding upon, 
nor shall any resort be had to the private properties of, any of the 
investment managers of Seller, or any general partners thereof, or any 
employees or agents of the  investment managers

    IN WITNESS WHEREOF, Seller has executed this Bill of Sale as of the ___ 
day of _______, 1998, but effective on the date on which the Property is 
conveyed by Seller to Purchaser.
 

                                     _______________________________ 
                                     _______________________________ 

                                     By:___________________________  
                                          Authorized Representative  

<PAGE>


STATE OF _________       )
                         )  SS
COUNTY OF _______        )


          The undersigned, a Notary Public in and for said County in the 
State aforesaid, DOES HEREBY CERTIFY that ________________, authorized 
representative of 
_________________________________________________________________, who is 
personally known to me to be the same person whose name is subscribed to the 
foregoing instrument as such authorized representative, appeared before me 
this day in person and acknowledged that __he, being duly authorized, signed, 
sealed and delivered the said instrument as h___ free and voluntary act, and 
as the free and voluntary acts of said corporation, for the uses and purposes 
therein set forth.

          GIVEN under my hand and Notarial Seal this _____ day of 
______________, 1998.

                         _______________________
                            Notary Public


My Commission Expires:

____________________, 19___


                                       2

<PAGE>

                                   EXHIBIT A

                               Legal Description






                                       3

<PAGE>

                                   EXHIBIT B
                                 -------------

                               Personal Property


NUMBER    ITEM                         DESCRIPTION
- ------   --------------------------    ----------------------------------
2         METAL CABINETS               ASSORTED PAINT & SUPPLIES, DROP
                                        CLOTHES
1         METAL FILE CABINET           ELECTRICAL  SUPPLIES
1         LARGE METAL SHELF            ASSORTED PLUMBING SUPPLIES
2         SMALL METAL SHELVES          ASSORTED DOOR CLOSURES & BALLAST
                                       ASSORTED DROP CLOTHES & COVE BASE
1         WOODEN SHELF AT WORK BENCH   ASSORTED NUTS & BOLTS, WASHERS, COFFEE
                                        CANS & SUPPLIES
2         4 FT. STEP LADDERS           WOOD & ALUMINUM
2         PUSH BROOMS
1         WORK BENCH & VISE            UNDER WORK BENCH-ASSORTED EMPTY PAINT
                                       BUCKETS & DOOR KNOBS & OTHER SUPPLIES.
                                       HAND SOAP DISPENSER PARTS.
2         WET MOPS & BUCKETS
2 CASES    F40CW LIGHT BULBS - 4 FT.
1 CASES   8 FT. LIGHT BULBS
1         24 FT. EXTENSION LADDER      FIBERGLASS
1         6 FT. STEP LADDER            WOOD
2         10 FT. STEP LADDER           1-WOOD, 1-FIBERGLASS
1         8 FT. STEP LADDER
2         SECTIONS OF RUBBER HOSE
          ASSORTED BELTS FOR AIR
           HANDLERS                   
1 CASE    FILTERS FOR WALL FAN UNITS
1         PAINT SPRAYER
2         RAKES
1         POST HOLE DIGGER

                                       4
<PAGE>

NUMBER    ITEM                         DESCRIPTION
- ------   --------------------------    ----------------------------------

1         ICE CHOPPER
          ASSORTED P.V.C. PIPE
1         SET OF WOODEN TRUSSES
6         5 GALLON CANS                ASSORTED PAINTS
6         ELECTRIC MOTORS
          (UNDER AIR HANDLER #3)
1         WEED WACKER
1         SCAFFOLD
          RUBBER CONES
          PAINT THINNERS
1         KEYSCAN LOCK SYSTEM          COMPUTERIZED SYSTEM TO MONITOR LOCKING
                                       AND UNLOCKING OF DOORS. KEYS ISSUED TO
                                       SELECTED TENANTS


                                       5
<PAGE>

                                Schedule 8.6.10

                          SELLER'S CLOSING CERTIFICATE


          THIS CLOSING CERTIFICATE is made as of the ___________ day of 
_______________________, 1998, by and between 
________________________________ ______________________  ("Seller"), to and 
in favor _____________________________________________________________, a 
__________ ("Purchaser"), under and pursuant to that certain Agreement of 
Purchase and Sale by and between Seller and __________, with an Effective 
Date as defined therein (the "Agreement"), for the purchase and sale of that 
certain Property situated in the _________, _______ County, ____________ (as 
defined in the Agreement).

          Pursuant to Paragraphs 5.3 and 8.6.10 of the Agreement and except 
as disclosed on Exhibit A attached hereto and made a part hereof, Seller 
hereby reconfirms, remakes and rewarrants to Purchaser as of the date hereof 
each of the representations, warranties and covenants given by Seller 
contained in Paragraph 5.1 of the Agreement in the same manner as such 
representations, warranties and covenants were given in the Agreement, each 
of which is incorporated herein and made a part hereof by this reference.  
Except as modified hereby, Seller hereby confirms that each of said 
representations, warranties and covenants are true and accurate in all 
material respect as of the date hereof.  Seller's reconfirming, remaking and 
rewarranting of its representations, warranties and covenants is subject to 
the limitations set forth in Paragraph  5.3 of the Agreement.

          The obligations of Seller contained herein are intended to be 
binding only on the property of the Seller and shall not be personally 
binding upon, nor shall any resort be had to the private properties of, any 
of the investment managers of Seller, or any general partners thereof, or any 
employees or agents of the  investment managers

          IN WITNESS WHEREOF, Seller has executed this Closing Certificate on 
the day and year first above written, but effective upon the date on which 
the Property is conveyed by Seller to Purchaser.

SELLER:

_____________________________
_____________________________


By:
    -----------------------------
          Authorized Signatory


<PAGE>

                                   EXHIBIT A

                                   Disclosure


<PAGE>

                                 Schedule 9.7.2

NEW LEASE APPROVAL FORM

Property: ________________________________________________________________

Tenant:   ________________________________________________________________

Square Feet:______________________________________________________________

Location: _________________________________

Anticipated Lease Commencement: __________________________________________

Anticipated Rent Commencement:  __________________________________________

Term:  ___________________________________________________________________

FREE RENT: _______________________________________________________________

Rental Rate: ___________Period   _____________ PSF Rate __________Annual Income

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________


Note: Above rental rates do not include Tenant Electric

Tenant Improvement Allowance:  PSF _________ Amount ___________T.I. 

Mechanism:  ______________________________________________________________

__________________________________________________________________________

__________________________________________________________________________


OPTIONS:   _______________________________________________________________

           _______________________________________________________________

           _______________________________________________________________


Initial Commission:

________ BROKER___________________% ______________________Amount
______________________________________________________________________
______________________________________________________________________

Broker Future Entitlements:___________________________________________
______________________________________________________________________
______________________________________________________________________

Other Comments:_______________________________________________________
______________________________________________________________________
______________________________________________________________________


Approved By: ____________________________

<PAGE>

                                 Schedule 9.26

                      SEC COMPLIANCE REPRESENTATION LETTER

(Accountant Name & Address)

Dear Sirs:

     In connection with your audit of the statement of revenues and certain 
expenses of the Properties situated in the City of King of Prussia, 
Montgomery County, Pennsylvania, commonly known as a portion of the King of 
Prussia Business Center (the "Property") for the year ended December 31, 
199__ (the "Operating Statement"), prepared for the purpose of complying with 
the rules and regulations of the Securities and Exchange Commission, the 
undersigned ("Seller") makes the following limited, qualified and specific 
representations, which are true to Seller's knowledge (as such phrase is 
hereinafter defined):

     1.   Seller has made available or caused its property manager to make 
          available to Brandywine Operating Partnership, L.P.  ("Buyer"), or 
          its representatives, Seller's financial records and files in 
          Seller's actual possession pertaining to the operation of the 
          Property (such records and files being collectively referred to 
          herein as the "Files").

     2.   Except as disclosed in the Files, Seller is not aware of any events 
          or transactions which have occurred since December 31, 199_ and 
          prior to the date hereof that would have a material effect on the 
          Operating Statement for the period then ended.

     3.   We recognize that, as the Owner of the Property, we are responsible 
          for directing the fair presentation of the Operating Statement.  We 
          believe the Operating Statement is fairly presented in conformity 
          with generally accepted accounting principals.

     As used in this letter, the words "Seller's knowledge" shall be deemed 
to mean, and shall be limited to, the actual (as distinguished from implied, 
imputed or constructive) knowledge of Joseph S. Cappelletti and Barbara 
Gillentine without such person having any obligation to make an independent 
inquiry or investigation.

     Notwithstanding any provision in this letter to the contrary, Seller is 
executing this letter solely as an accommodation to and at the request of 
Buyer and, except to the extent Seller is liable to Buyer for representations 
and warranties expressly set forth in that certain Agreement of Purchase and 
Sale, dated _________ 1998, by and between Seller and Buyer (the "Sale 
Agreement'), this letter is subject to the condition that Seller shall not be 
liable or responsible to Buyer, any parent, subsidiary or other affiliate of 
Buyer, or any officer, director, employee, agent, representative, 
shareholder, partner or principal of Buyer or any such parent, subsidiary or 
other affiliate thereof or any accountant or other professionals engaged by 
or on behalf of any of the foregoing, including, without limitation, 
[accountant](all of the foregoing being collectively referred to herein as 
the "Buyer Parties"), as a result of the fact that any of the statements made 
herein are in any way inaccurate, untrue or incorrect.  By the acceptance of 
this letter, except for rights and remedies that Buyer may have under the 
Sale Agreement with respect to representations and warranties expressly set 
forth in the Sale Agreement, each of the Buyer Parties shall be deemed to 
have waived any and all rights and remedies that any of them may have against 
Seller, whether at law or in equity, as a

                                       4

<PAGE>

result of the fact that any of the statements made herein are in any way 
inaccurate, untrue or incorrect.

     Seller has executed this letter for the limited purposes set forth 
herein, and for the use of [accountant] only.  No other parties may rely on 
the statements set forth herein.

                              Very truly yours,

                              RREEF USA FUND-I,
                              a California group trust
                    
                              By:  RREEF America L.L.C.,
                                   a Delaware limited liability company
                    
                              By:_______________________________
                              Name:   Joseph S. Cappelletti
                              Title:  Its Authorized Representative
                    
                    
                              By:  __________________________________
                              Name:   Barbara J. Gillentine
                              Title:  Its Authorized Representative


                                       5
<PAGE>

                                   EXHIBIT A

                         Legal Description of Property


<PAGE>

                                  EXHIBIT A-1

                        Descriptive List of the Property


King of Prussia Industrial Park, King of Prussia, Pennsylvania

     1.        600 Park Avenue
     2.        650 Park Avenue
     3.        875 First Avenue
     4.        630 Clark Avenue
     5.        650 Clark Avenue
     6.        620 Allendale Road
     7.        640-660 Allendale Road
     8.        680 Allendale Road
     9.        741 Third Avenue
     10.       820 Third Avenue
     11.       780 Third Avenue
     12.       751-761 Fifth Avenue
     13.       Allendale Road Development Site


<PAGE>


Exhibit 23.1



                         CONSENT OF INDEPENDENT ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of 
our report dated January 22, 1998 in this Form 8-K on the combined statement 
of revenue and certain expenses of the RREEF Properties into the Company's 
previously filed Registration Statements on Forms S-3 (File No. 333-20999 and 
333-39155) and Forms S-8 (File No. 333-14243 and File No. 333-28427).

                                   ARTHUR ANDERSEN LLP

Philadelphia, Pa.,
  January 27, 1998




© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission