CONTRACT OF SALE

Today, the twenty-first of June, nineteen hundred and ninety-six,  the following
parties appeared before me, Mr Eric Feijen, junior civil-law notary, residing in
Heerde,  deputizing for the civil-law notary  practicing in Heerde,  Mr Johannes
Willibrordus Jozef Maria Schurink: --

 ..---------

1. Mr Wicher Albertus Reil, organ builder, residing at Korte Soerelseweg 2, 8181
AM  Heerde,  born in  Heerde  on the  sixteenth  of July  nineteen  hundred  and
forty-two, married, passport number L 060054, acting in his capacity as managing
director of the private limited company  Orgelmakerij Gebrs. Reil B.V., with its
registered office in Heerde and its principal place of business at Postweg 50/B,
8181 VJ Heerde,  and as authorized  representative  of the sole deputy  managing
director of the aforementioned  private limited company,  Mr Johann Ludwig Reil,
organ builder,  residing at Soerelseweg 8, 8181 AK Heerde, born in Heerde on the
twenty-first of April nineteen hundred and thirty-nine, married, passport number
L 060045 and legally  representing said company in this capacity,  which company
is acting for itself and as  authorized  representative  of the private  limited
company Rood Technology Nederland B.V., at the time having its registered office
in Heerde; -----------------


2. Mr Fokko Pentinga, sales manager,  residing at Lisztstraat 1, 6815 CN Arnhem,
the Netherlands,  born in Slochteren,  the  Netherlands,  on the twenty-fifth of
February  nineteen  hundred and  fifty-five,  married,  driving  licence  number
0070021978,  acting in his capacity as authorized  representative of Mr Jong Soo
Whang,  company  director,  residing at South Maple 831,  Mesa,  Arizona  85205,
United States of America,  born in Seoul,  Korea on the twenty-second of October
nineteen hundred and forty-five, married, who has granted this power of attorney
as president of Tempress  Systems Inc., in his capacity as legal  representative
of the company  under the laws of the state of Texas,  United States of America:
Tempress Systems Inc., having its registered office in Austin, Texas, the United
States of  America,  and a place of  business at De  Lavelstraat  la,  Hoogeveen
(future address: Brugstraat 2, 8181 VH Heerde) --------
- ------   ------------------------



The power of attorney for the private limited company  Orgelmakerij  Gebrs. Reil
B.V. is  demonstrated  by a deed of transfer  of  economic  ownership,  executed
before the  aforementioned  civil-law  notary

Schurink  on  the   fifteenth  of  June   nineteen   hundred  and   ninety-four.
- --------------

The other powers of attorney are  demonstrated  by two private  deeds which have
been  attached to this deed.  The  existence  of the powers of attorney has been
sufficiently demonstrated to me, deputy civil- law notary. ----------------

The  party   appearing  under  1  declared  that  the  private  limited  company
Orgelmakerij  Gebrs.  Reil B.V.  purchased  the  private  limited  company  Rood
Technology  Nederland B.V. by virtue of the  aforementioned  deed of transfer of
economic ownership, but did not receive ownership of the same. - ------------- -
 .------------------

The commercial  property at Brugstraat 2 in Heerde,  seventeen  areas and thirty
centiares in size, recorded in the land register as Heerde Municipality, Section
B, number 3088,  which plot is partially  encumbered with a restricted  right as
referred to in the Public Works (Removal of Impediments in Private Law) Act, for
the benefit of the company limited by shares N.V. NUON Energie- Onderneming voor
Gelderland,  Friesland en Flevoland, having its registered office in Arnhem, for
the purpose of laying,  owning,  maintenance,  repair, and (where necessary) the
replacement and removal of an underground high-voltage cable, as shown in ground
plan number 4063-447,  attached to the deed by means of which the aforementioned
right was established.  A copy of the aforementioned drawing is attached to this
deed. -- 
The purchase price has been paid in full.

Ownership  of the  aforementioned  immoveable  property  was -  acquired  by the
private limited company Rood Testhuis B.V.;

- - inasmuch  as derived  from number 2484  through the  registration  at the land
registry  in  Arnhem on the  twenty-fifth  of  September  nineteen  hundred  and
seventy-nine,  in part  5751,  number  65 of the  copy of the  deed of  transfer
executed on the preceding  twenty-fourth of September before civil-law notary Mr
A. Bok, practicing at the time in Heerde;---------------------------------------

inasmuch  as  derived  from  number  2484  through  the   registration   at  the
aforementioned  land  registry on the  sixteenth  of June  nineteen  hundred and
eighty-three,  in part  6346,  number  92 of the  copy of the  deed of  transfer
executed on the preceding fifteenth of June before the aforementioned  civil-law
notary Bok.  -------------  Contained  in these  deeds was a  discharge  for the
purchase  price,  and a waiver  to the right to demand  the  dissolution  of the
agreement  on the grounds of the  provisions  of  Sections  1302 and 1303 of the
Dutch Civil Code. ------------------------------------

The name Rood Testhouse B.V. was changed on the twenty-first of January nineteen
hundred and ninety-two to Rood Technology Nederland B.V. by deed executed before
the aforementioned civil-law notary Schurink.-----------------------------------

The party  appearing  under 1 declared that he had sold to the company under the
laws of Texas,  United  States of America,  Tempress  Systems  Inc.,  having its
registered  office in Austin,  Texas,  the United  States of America,  which the
party appearing under 2 declared to have bought: --------------------------
- ----------------

The right to delivery of the aforementioned immoveable

The parties appearing declared that this purchase agreement was entered into for
a purchase price of five hundred and fifty-seven thousand guilders (NLS 557,500.
The purchase price has been paid in full by the purchaser to the  aforementioned
civil-law notary Schurink.------------------------------------------------------

In  performance  of the  obligation  to  deliver,  the party  appearing  under 1
declared on behalf of the private limited company Rood Technology Nederland B.V.
that ownership of the aforementioned  immoveable  property be transferred to the
company under the laws of the state of Texas, United States of America, Tempress
Systems Inc.,  having its registered office in Austin,  Texas,  United States of
America,  for which the party  appearing  under 2  declared  the  acceptance  of
ownership of said immoveable property. -------------

The parties have agreed that the share of the  purchase  price to be paid to the
seller  shall be retained by the  civil-law  notary  acting as custodian of this
deed until such a time as it is clear to the latter that the  transfer has taken
place  without  registrations  which were not known at the time of  execution of
this deed.  ------- This sum will be paid  immediately  to the seller after this
time. -- The following stipulations have been laid down:  -------------------

1. The  property  sold will be  transferred  in the  condition  it was in at the
moment the  purchase  agreement  was signed,  with all rights and  burdens.  The
seller  is  authorized  to carry  out the sale and  delivery.  The  transfer  of
ownership  is  unconditional.  The  purchaser  will use the  property  sold as a
commercial property.  -------------- 

The  seller is not aware of any  grounds  under  private  or public law why this
should not be permitted. ------------------

2. The property  sold is free of mortgage and  attachment.  The property sold is
not  encumbered  with  qualitative  obligations,  easements or other burdens and
contractual stipulations other than those listed below.-------------------------

3. A copy of this deed will be recorded in the public registers.

4. The  purchaser  can accept the property sold free from rental or other rights
of enjoyment and completely vacant, as of today. ----

The risk is transferred to the purchaser today.

5. All  property  charges on the  property  sold shall be at the  expense of the
purchaser as of today. ----------------------------

Settlement has taken place. --------------------------------------

6. No claims are permitted on the grounds of a difference in size.

7. The seller guarantees that it has not been notified by the state or utilities
companies of any improvement or repair work which have not yet been carried out,
or not yet carried out to acceptable standards. -

8. All claims  which the seller can and will  enforce in respect of the property
sold against third parties, including builders, (sub)contractors, installers and
suppliers are  transferred  to the  purchaser.  Inasmuch as these claims are not
enforceable as  qualitative  rights as referred to in Section 251, Book 6 of the
Dutch Civil Code,  the seller  shall  cooperate  in the transfer of these at the
purchaser's first request. -------------------------- The seller shall also hand
over all proofs of guarantee  relating to the property sold to the purchaser and
to take all steps necessary to transfer these to the purchaser's name. -- 

9. The  seller is not  subject to any  obligations  vis-a-vis  third  parties by
virtue of a priority right or right of option.

No legal  proceedings,  binding advice or arbitration  are pending in respect of
the property sold. ------------------------------------

10. As far as is known by the seller, there are no facts which may indicate that
the property sold contains any pollution  which may be detrimental to the use by
the  purchaser  as  described  above or which  results  in or may  result  in an
obligation   to   decontaminate   the   property   sold,   or  to   take   other
measures.----------------------

11. As far as is known by the seller, the property also has no underground tanks
for the storage of liquids. --------------------

12. The seller is not aware of any  materials in the property  which may contain
asbestos, other than the asbestos cement wall cladding of which the purchaser is
aware.

13. Inasmuch as this deed has not deviated therefrom, that which has been agreed
between the parties before the execution of this deed in respect of the purchase
agreement shall remain in effect.

14. The parties cannot dissolve this agreement nor order its dissolution. --

15. The costs of this deed, the  registration  fees and transfer tax,  including
the transfer tax on five hundred and fifty-seven  thousand five hundred guilders
(NLG 557,500) levied on previous  acquisitions in the six months before this day
are at the expense

of purchaser.

16. The  provision  of  Section  204c,  Book 2 of the Dutch  Civil Code does not
apply. ---

17. All risks  concerning the  functioning of the systems are transferred to the
purchaser. ------------------------------------

18.  The  seller  shall  ensure  closure  of the  boundary  to the  north of the
building,  at the  boundary  between  the plots  known as  Heerde  Municipality,
Section B, numbers 3087 and -

19. The purchaser has applied for the required  permission from the Municipality
of Heerde in accordance  with the  Municipality of Heerde 1977 General Terms and
Conditions of Sale for Building Sites. ------

20. a. For the benefit and to the  detriment  of the plots  recorded in the land
registry as Heerde Municipality,  section B, numbers;3087 and 3088, the easement
is established  reciprocally  whereby the communal wall on the boundary  between
the two plots be tolerated.-----------------------------------------------------

b. For the benefit of the plot sold by means of this deed,  recorded in the land
registry as Heerde Municipality,  section B, number 3088 and to the detriment of
the plot belonging to the seller recorded in the land registry as number 3087 of
the same municipality and section, the following easement is established:

- - to tolerate and continue to tolerate the presence of the heat  exchangers  for
the  air-conditioning  unit on the property  sold and the plot  belonging to the
seller recorded in the land registry as Heerde  Municipality,  section B, number
3087. These heat exchangers belong to the property sold.  ----------------  
This  easement   lapses  if  these  heat   exchangers  are  moved  or  replaced.
- --------------------

- - that in the context of any laying of cables on the part of the purchaser,  the
purchaser  may  make  use  of  the   transformer  on  the  seller's  plot;  such
cable-laying must take place in the manner that causes the least  inconvenience.
All costs  relating  to the  laying  and  connection  of cables  shall be at the
purchaser's   expense.  Any  cooperation  provided  by  NUON  shall  be  at  the
purchaser's risk. --
21. The  partition  wall between the property  sold and the part of the building
still owned by the seller will, in full consultation and at the instructions and
expense of the purchaser, be modified to meet fire safety requirements as set or
to be set by the authorized bodies.--------------------------------  

In the event that these modifications  affect the emergency exit and door of the
property  still  owned by the  seller,  these  shall also be at the  purchaser's
expense. ------------------------------------ --

These  modifications may not have any fundamental effect on the 

functionality  of the on-site  exit and  emergency  exit of the  seller,  on the
understanding  that the existing  emergency exit door may, in consultation  with
the seller, be made slightly narrower than is currently the case, as long as the
functionality  is  not  affected.  All  modifications  shall  be  fully  at  the
purchaser's expense. -----

22. All goods  currently  present in the property sold are deemed to be included
in the property sold. --------------------------------

23. Inasmuch as has not yet taken effect,  this delivery is subject to the "1977
General Terms and Conditions of Sale for Building
These  conditions  were laid down in a deed executed  before the  aforementioned
civil-law  notary  Bok  on  the  eighteenth  of  October  nineteen  hundred  and
seventy-seven  and  registered  in  the  aforementioned  land  registry  on  the
nineteenth  of  October of that  year,  under  Part  4997,  Number 34. The party
appearing  under 1 declared that it imposed the provisions of Articles 9, 13, 15
through  20 and 22  through  30 of these  General  Terms and  Conditions  on the
purchaser.-

The party  appearing under 2 declared that it would bind the purchaser to fulfil
these provisions.-

The party  appearing  under 1, acting in the  interests of the  Municipality  of
Heerde,  declared  the  acceptance  of the above on behalf of the  municipality.
- -------------------------

The  purchaser  declared  that he had  received a copy of the General  Terms and
Conditions of Sale.

The party  appearing  under 2  declared  the  acceptance  of the  aforementioned
burdens and restrictions on behalf of the purchaser.  The parties grant power of
attorney to Mr Mannes  Vlieger,  bookkeeper,  Mr Hendrik Jan Kamphuis,  notary's
clerk,  Ms Grietje van den Brink,  notarial  assistant,  Ms Diana Alia  Liefers,
notarial assistant and Ms Hendrika Wilhelmina van den Brink, notarial assistant,
all residing in Heerde,  and Ms Johanna  Aarentina Witman,  notarial  assistant,
residing in Vaassen, the Netherlands, both jointly and each separately, to waive
mortgage  rights on their behalf,  inasmuch as these may be  registered  for the
property sold encumbering persons other than the purchaser. --

For the implementation of this deed, the parties elect domicile at the office of
the civil-law notary acting as custodian of this deed.

The  identity  of the  parties  appearing  has been  determined  by means of the
aforementioned documents intended for this purpose. --

The parties  appearing are known to me, deputy civil-law  notary.  -- IN WITNESS
WHEREOF the parties hereunto set their hands in Heerde, the Netherlands,  on the
date first hereinbefore written. ---------

After a limited reading of the contents of this deed to the parties, the parties
declared  unanimously  that they had taken note of the contents of this deed and
did not require the deed to be read out in full.--------------------------------

Immediately  following  a limited  reading,  this deed was signed by the parties
appearing  and me,  deputy  civil-law  notary,  at  sixteen  hundred  hours  and
thirty-five minutes. (signed): W.A. Reil; F. Pentinga; E. Feijen. --For the true
copy

[signature]

The undersigned, Mr Eric Feijen, junior civil-law notary, residing in Heerde, as
deputy  for  the  civil-law   notary   practicing  in  that  place  Mr  Johannes
Willibrordus  Jozef  Maria  Schurink,  declares  that  the  immoveable  property
alienated  by virtue of this  deed  within  the  meaning  of the  Municipalities
(Preferential Rights) Act is not included in a designation by virtue of Sections
2 or 8 nor in a proposal by virtue of Section 6 of that act.

[signature]

OFFICES OF CIVIL--LAW NOTARY

J . W . J . M . SCHURINK

PRACTICING IN HEERDE

OWNERSHIP TITLE FOR

Tempress Systems Inc., having its registered office in Austin, Texas, the United
States of America, and a place of business in Hoogeveen, the
Netherlands.

OR

the commercial property at Brugstraat 2 in Heerde,
the Netherlands.

Deed of 21 June 1996.