Exhibit 4.24

                 KROEZEN/VAN DE RIJT STRAATES & PARTNERS V.O.F.

                      ESTATE AGENTS IN COMMERCIAL PROPERTY

ACT Sigmex B.V.
Attn. Mr J.G.M. Veltman
Koningsschot 39
3900 AH VEENENDAAL

COPY



OUR REF.:       SUBJECT:                         DATE:
- ---------       --------                         -----
                                           
SZ\AW9303.10B   Culemborg office villa,          11 March 1993
                Landzichtweg/Weth. Schoutenweg


Dear Mr Veltman,

We hereby confirm, also on behalf of our client, that we reached consensus on 10
March 1993 on the letting, or leasing, of the above-mentioned property.

This lease is to be concluded on the following terms:


                     
Lessor:                 Kroezen Vastgoed Exploitatie B.V., with its registered
                        office in (postcode 4153 AG) Beesd at Dorpsplein 5, duly
                        represented in this matter by S.E. Kroezen

Lessee:                 ACT Sigmex B.V., with its registered office in
                        Veenendaal at Koningsschot 39, duly represented in this
                        matter by J.G.M. Veltman

Property:               the real property, consisting of office space, which is
                        part of an office villa located on the parcel
                        Landzichtweg/corner Wethouder Schoutenstraat in
                        Culemborg, and indicated as block A on the attached
                        drawing, being the ground floor and the first storey,
                        with a total surface area of approx. 633 m(2).

Rent:                   NLG 195/ m(2), in words: one hundred ninety-five (Dutch)
                        guilders, annually, plus the prevailing VAT, which
                        implies a total rent of NLG 123,435 (in words: one
                        hundred twenty-three thousand four hundred thirty-five
                        guilders annually.

Service charges:        NLG 32.50/ m(2), in words: thirty-two guilders and fifty
                        cents, annually, plus the prevailing VAT. This is an
                        advance sum to be charged on the basis of subsequent
                        calculation. You will find a list of the service charges
                        as an annex.




Page 2


continuation of AW9303.10B of 10 March, 1993


                     
Indexation:             Annually, in accordance with the C.B.S. (Statistics
                        Netherlands) data, on the basis of the annual price
                        index figures of the family consumption series for
                        employees' families with a family income in 1985 (or the
                        most recent basis) below the wage limit for compulsory
                        health insurance (1985 = 100, or the most recent time
                        basis).

Commencement date
of the lease:           1 October 1993 or as much earlier as the building is
                        delivered.

Term of the lease:      five years

Notice period:          twelve months

Option period:          five years

Lease:                  in accordance with the model of the Real Estate Council
                        of the Netherlands (R.O.Z.)

Bank guarantee:         in the amount of three month's rent with the
                        accompanying service charges, including the prevailing
                        VAT.

Special stipulations:   1.   The leased property will be delivered including:
                             floor covering, partitions with a surface area not
                             exceeding 60 per cent of the leased floor area,
                             therefore 380 m(2), modular ceiling with light
                             fittings, and further in accordance with the
                             general information, which is in your possession.

                        2.   The parent company of the Lessee has provided a
                             parent-company guarantee as a guarantee for payment
                             of the rent.

Reservation:            This consensus was reached subject to the reservation
                        that the parent company of the Lessee in England
                        approves it. This approval must be given by 24 March
                        1993 at the latest. If approval has not been given on
                        this date, this consensus shall lapse.


Please find a copy of this consensus as an annex. We request you to sign this
copy in evidence of your agreement and to return it immediately. As soon as the
reservation is removed, we shall have the lease sent to you as soon as possible.

Trusting that we have represented the agreements correctly,
we remain,

Yours faithfully,
(signature)                             for approval
                                        ACT Sigmex B.V.

- -------------------------------------   J.G.M. Veltman
A.N. van de Water                       on
Van de Rijt Straates & Partners            -------------

Copy: Client
Annex.



SERVICE CHARGES

The services charges of the office villa include, for example the costs of:

     -    service subscription, electricity consumption, fuel consumption, water
          consumption, measurement of consumption, operation, repairing
          failures, tests, etc., for:

     -    lifts

     -    air conditioning system

     -    central heating system

     -    pressure water system

     -    low-voltage system

     -    emergency power system

     -    fire alarm system

     -    bell system

     -    door opener

     -    fire extinguishers

     -    automatic sliding door system

     -    common lighting, including the costs of fluorescent lighting fittings
          and bulbs;

     -    glass insurance of all windows

     -    washing of glass and walls on the outside of the building, common
          areas, service areas and communal spaces, both inside and outside

     -    costs of maintaining the garden and parking spaces on the building's
          own grounds

     -    cleaning costs of common areas


                             LEASE FOR OFFICE SPACE

              CULEMBORG, LANDZICHTWEG/CORNER WETHOUDER SCHOUTENWEG



                                TABLE OF CONTENTS


                                                                         
LEASE FOR BUSINESS PREMISES
   The undersigned                                                             1
   Article 1 - property, designated use                                        1
   Article 2 - conditions                                                      1
   Article 3 - duration, extension and termination                             2
   Article 4 - payment obligation, payment period                              2
   Article 5 - turnover tax                                                    3
   Article 6 - bank guarantee                                                  4
   Article 7 - supplies and services                                           4
   Article 8 - special stipulations                                            5
GENERAL CONDITIONS FOR LEASING OFFICE SPACE
   Article 1 - Leased Space                                                   II
   Article 2 - Purpose and use                                                II
   Use (I)
   Permits (II)
   Associations (II)
   Advertising (II)
   Apartments (III)
   Prohibitions and rules of procedure (III)
   Article 3 - Subletting                                                      V
   Article 4 - Rent increases                                                 VI
   Article 5 - End of the lease or use                                       VII
   Article 6 - Damage and/or loss                                           VIII
   Article 7 - Interim termination, default                                   IX
   Article 8 - Bank guarantee                                                  X
   Article 9 -  Maintenance                                                   XI
   Article 10 - Access of the Lessor                                         XII
   Article 11 - Costs of energy, and so forth                               XIII
   Article 12 - Costs                                                        XIV
   Article 13 - Payments                                                     XIV
   Article 14 - Taxes, charges, levies, premiums and so forth                XIV
   Article 15 - Severalty                                                     XV
   Article 16 - Late availability                                             XV
   Article 17 - Address for service                                          XVI




The undersigned:

KROEZEN VASTGOED EXPLOITATIE B.V.

with its registered office in (postcode 4153 AG) BEESD at Dorpsplein 5, duly
represented in this matter by S.E. KROEZEN,

hereafter referred to as "LESSOR",

and

ACT SIGMEX B.V.,

with its registered office in (postcode 3900 AH) VEENENDAAL at KONINGSSCHOT 39,
duly represented in this matter by J.G.M. VELTMAN,

hereafter referred to as "LESSEE",

agreed the following Lease on 11 MARCH 1993:

ARTICLE 1 - PROPERTY, DESIGNATED USE

1.1  This Lease relates to the property, hereafter referred to as "THE LEASED
     SPACE", known locally as CULEMBORG, LANDZICHTWEG/CORNER WETHOUDER
     SCHOUTENWEG, recorded in the land register under Municipality of CULEMBORG,
     SECTION N, PART OF NO. 158, PART OF NO. 159 and PART OF NO. 160, consisting
     of APPROX. 633 M(2) OF OFFICE SPACE ON THE GROUND FLOOR AND THE FIRST
     STOREY OF THE OFFICE VILLA, BLOCK A, and indicated in more detail on the
     drawing(s) and/or description(s) of the Leased Space certified by the
     parties and attached to this deed, which are sufficiently known to the
     parties.

1.2  The Lessee will use the Leased Space only as OFFICE SPACE AND PRECISION
     REPAIR SPACES.

ARTICLE 2 - CONDITIONS

2.1  The following form part of this Lease:

     A.   the General Conditions, certified by the parties, which are attached
          to this Lease as an integral part thereof;

     B.   the provisions of the deed of division of property, the accompanying
          regulations for the division of property and any internal regulations
          adopted, in so far as these provisions are applicable and if the
          Leased Space is part of a building or complex which has been divided
          into apartments.


Lessee's initials:
                   ------------------


Lessor's initials:
                   ------------------


                                                                               1



2.2  The rules ensuing from paragraph 2.1 of this Lease will be applicable,
     except in so far as the provisions referred to below explicitly depart from
     them, or application to the Leased Space is not possible.

ARTICLE 3 - TERM, EXTENSION AND TERMINATION

3.1  This Lease is entered into for the term of FIVE years, commencing on 1
     OCTOBER 1993 OR AS MUCH EARLIER AS THE BUILDING IS DELIVERED BY THE LESSOR
     TO THE LESSEE, and ends on 30 SEPTEMBER 1998.

3.2  During the period referred to in 3.1 of this Lease, the parties may not
     terminate this Lease in the interim by giving notice. Notice in accordance
     with paragraph 3.4 of this Lease will be required to terminate this Lease
     at the end of this period.

3.3  If the period referred to in paragraph 3.1 of this Lease expires without
     notice having been given in accordance with paragraph 3.2, this Lease will
     continue for a contiguous period of FIVE years, therefore until 30
     SEPTEMBER 2003. This Lease will, however, end at that time only if notice
     has been given in accordance with paragraph 3.4 of this Lease. If such
     notice is not given, this Lease will continue further for a following
     contiguous period of FIVE years and so on, barring, however, notice in
     accordance with paragraph 3.4 of this Lease at the end of the following
     period.

3.4  Notice of termination of this Lease may only be sent by bailiff's
     notification or by post recorded and signed for, with due observance of a
     notice period of at least TWELVE months prior to the expiry of the current
     period.

3.5  This Article will not affect the provisions under Article 7 of the General
     Conditions certified by the parties and attached to this Lease as an
     integral part thereof.

ARTICLE 4 - PAYMENT OBLIGATION, PAYMENT PERIOD

4.1  The Lessee's payment obligation consists of:

     -    the rent,

     -    the payment referred to under Article 7 of this Lease for additional
          supplies and services,

     -    the turnover tax legally due on the rent and this payment or an
          equivalent amount as referred to under Article 5 of this Lease.

4.2  The annual rent is NLG 123,435, in words: ONE HUNDRED TWENTY-THREE THOUSAND
     FOUR HUNDRED THIRTY-FIVE guilders. The rent will be increased annually on 1
     OCTOBER, for the first


                                                                               2



     time on 1 OCTOBER 1994, and so on, in accordance with Article 4 of the
     General Conditions certified by the parties and attached to this Lease as
     an integral part thereof.

4.3  The payment for additional supplies and services will be determined in
     accordance with Article 11 of the General Conditions certified by the
     parties and attached to this Lease as an integral part thereof, and a
     system of advance payments with subsequent settlement will apply to this
     payment, as referred to there.

4.4  The rent and the advance on the payment for additional supplies and
     services and the turnover tax or equivalent amount will be due in advance,
     always by or on the first day of the period to which the payment relates.

4.5  The following amounts are due per payment period of 3 months:


                                                           
     -    the rent                                         NLG   30,858.75

     -    the advance on the payment for heat
          or the supply of hot water and additional
          supplies and services                            NLG    5,143.13
                                                           ---   ---------
          so that the Lessee will have to pay a total of   NLG   36,001.88
                                                           ---   ---------


          in words: THIRTY-SIX THOUSAND AND ONE GUILDERS AND EIGHTY-EIGHT CENTS,
          plus the legally due turnover tax or equivalent amount as referred to
          in Article 5 of this Lease.

ARTICLE 5 - TURNOVER TAX

5.1  The statutory turnover tax must be paid on all sums referred to in this
     Lease with the General Conditions forming an integral part thereof. The
     Lessee will owe turnover tax on the rent and the payment for additional
     supplies and services. The turnover tax will be charged by the Lessor and
     must be paid simultaneously with the rent and the payment for additional
     supplies and services, or the advance thereon.

5.2  The Lessee hereby grants the Lessor irrevocable authorisation, also on the
     Lessee's behalf, to submit a request as referred to in Section 11, under
     b., 5o of the Turnover Tax Act 1968 (Wet op de Omzetbelasting 1968)
     (request opting for taxed rent). If asked to do so, he must co-sign this
     request within 14 days after he has received it from the Lessor and return
     it to the Lessor.

5.3  If the request is not submitted within the period stipulated by law, or it
     is not granted, over and above the rent and the payment for additional
     supplies and services or the advance thereon, the Lessee will owe an amount
     which is equivalent to the amount of turnover tax that would have been due
     if the request had been granted. The same holds if the request is granted
     as of a later date than was requested, although only during the period
     ending on the commencement date of taxed rent.


                                                                               3



5.4  If the Lessee demonstrates that it is the Lessor's fault that the request
     was not submitted on time or not granted, the amount equivalent to turnover
     tax referred to in paragraph 5.3 of this Lease will not be due.

5.5  In case the Lessee sells the Leased Space or the building or complex to
     which the leased part belongs, and the new owner also opts for taxed rent,
     the Lessee will also be bound by the provisions of this Article.

ARTICLE 6 - BANK GUARANTEE

6.1  The terms of Article 8 of the General Conditions, certified by the parties
     and attached to this Lease as an integral part thereof, will apply to the
     security to be provided by the Lessee.

6.2  The amount referred to under paragraph 8.1 of the General Conditions,
     certified by the parties and attached to this Lease as an integral part
     thereof, is hereby set by the parties at NLG 36,001.88, in words:
     THIRTY-SIX THOUSAND ONE GUILDERS AND EIGHTY-EIGHT CENTS, plus the legally
     due turnover tax, being NLG 42,302.20, in words: FORTY-TWO THOUSAND THREE
     HUNDRED TWO GUILDERS AND TWENTY CENTS, including the legally due turnover
     tax.

ARTICLE 7 - SUPPLIES AND SERVICES

The parties agree that the following additional supplies and services will be
provided by or on behalf of the Lessor:

- -    service subscription, electricity consumption, fuel consumption, water
     consumption, measurement of consumption, operation, repairing failures,
     tests, etc., for:

- -    lifts

- -    air conditioning system

- -    central heating system

- -    pressure water system

- -    low-voltage system

- -    emergency power system

- -    fire alarm system

- -    bell system

- -    door opener

- -    fire extinguishers

- -    common lighting, including the costs of fluorescent lighting fittings and
     bulbs;

- -    glass insurance of all windows

- -    washing of glass and walls on the outside of the building, common areas,
     service areas and communal spaces, both inside and outside

- -    costs of maintaining the garden and parking spaces on the building's own
     grounds

- -    cleaning costs of common areas


                                                                               4



ARTICLE 8 - SPECIAL STIPULATIONS

8.1  The Leased Space will be delivered including floor covering, partitions
     with a surface area not exceeding 60 per cent of the leased floor area,
     therefore 380 m(2) and modular ceilings with light fittings.

8.2  The Lessee's parent company will provide a parent-company guarantee as a
     guarantee for payment of the rent.

Drawn up and signed in triplicate in:
(postcodes) 4153 AG BEESD and 3900 AH VEENENDAAL

The Lessor:                             The Lessee:
KROEZEN VASTGOED EXPLOITATIE B.V.       ACT SIGMEX B.V.


- -------------------------------------   ----------------------------------------
(signature)                             (signature)

S.E. KROEZEN                            J.G.M. VELTMAN

on 14 April 1993                        on 8 April 1993


                                                                               5


                   GENERAL CONDITIONS FOR LEASING OFFICE SPACE



ARTICLE 1 - THE LEASED SPACE

1.1  The Leased Space also includes the systems and facilities present, in so
     far as they are property of the Lessor and are described in the certified
     description attached to this Lease as an integral part thereof.

1.2  The Leased Space will be delivered and accepted in the condition indicated
     in the certified description attached to this Lease as an integral part
     thereof, or failing this, in the condition it is in at the time of
     delivery. The Lessee may, if it so desires, after consulting with the
     Lessor, make changes to or install facilities in or on the Leased Space at
     its own expense.

ARTICLE 2 - PURPOSE AND USE

USE

2.1  For the entire term of this Lease, the Lessee must use the Leased Space
     actually, properly and itself, exclusively in accordance with the purpose
     indicated in this Lease and with due observance of existing restricted
     rights and of requirements set or yet to be set by the government or public
     utilities. It must provide and continue to provide for sufficient
     furnishings and fixtures and fittings.

2.2  The Lessee must conduct itself in accordance with the provisions of the law
     and local bye-laws, as well as in accordance with the customs regarding
     leasing and letting, regulations of the government and utility companies
     and, if and to the extent applicable, of the "bureau voor
     Sprinklerbescherming" (Sprinkler Protection Agency) and insurers, as well
     as the oral and written instructions given by or on behalf of the Lessor in
     the interest of a proper use of the Leased Space and of the interior and
     exterior areas, systems and facilities of the building or complex of which
     the Leased Space is a part, particularly those relating to maintenance,
     appearance, noise level, order, fire safety, parking behaviour and the
     proper functioning of the building or complex of which the Leased Space is
     a part. The Lessee must always see to it as soon as possible that any
     necessary work is done and measures taken.

2.3  The Lessee must not cause any hindrance or nuisance to other users of the
     building or complex of which the Leased Space is a part, and must see to it
     that third parties present on its premises with its approval and its or
     their visitors do not do so either. The Lessor is not required to compel
     compliance with this. It will, however, be authorised to do so. Hindrance
     and nuisance also include interference with radio and television reception
     and with the operation of other electrical equipment.


Lessee's initials:
                   ------------------


Lessor's initials:
                   ------------------


                                                                              II



PERMITS

2.4  The Lessee itself must ensure compliance with requirements, including
     having permits, approvals, exemptions and so forth, in its possession in
     connection with the conduct of its business or profession in the Leased
     Space, including those pursuant to the Nuisance Act (Hinderwet) and the
     environmental laws. Non-compliance or failure to comply any longer with
     those requirements will never give the Lessee any cause to dissolve or
     nullify this lease, nor to take any other action against the Lessor.

2.5  If changes to, on or in, or facilities in or on the Leased Space are needed
     in connection with paragraph 2.4 of these General Conditions, whether or
     not required under government regulations, without prejudice to the
     provisions in paragraphs 2.12, 2.13, 2.14, 2.15, 2.16 and 2.17 of these
     General Conditions, the Lessee will be liable during performance of the
     work for compliance with the requirements set or to be set by the
     government, as well as for obtaining the necessary permits, and the costs
     of the changes or facilities will payable by the Lessee.

ASSOCIATIONS

2.6  If an association or other collective of lessees or users of the building
     or complex of which the Leased Space is a part, which is recognised by the
     Lessor - for example an association of users of industrial units on an
     industrial estate - exists or is formed, the Lessee will be obliged to join
     it immediately and to maintain its membership thereof for the entire term
     of his Lease, and, at first request, to settle the amounts due from it in
     relation to this association or collective.

2.7  For the period that the Lessee is not a member, it will owe the Lessor the
     same amounts as those which it would owe to that association or collective
     if it were a member. The Lessor must pay these amounts to the association
     or collective immediately. The Lessee is not allowed to cooperate in the
     making of bye-laws, decisions and suchlike of an association or other
     collective of lessees or users which are in conflict with this Lease.

ADVERTISING

2.8  The Lessor will have the right, after consulting with the Lessee, for its
     own benefit as well as for the benefit of the Lessee or third parties, to
     have at its disposal the roofs, external walls, gardens and grounds of the
     Leased Space and the building or complex of which the Leased Space is a
     part for (light) advertisement, signs and otherwise. In exercising this
     right, the Lessor will take account of the, in its opinion, justified
     interests of the Lessee. The Lessee must tolerate the work and facilities
     for that work, and will never have any right of action against the Lessor
     in this regard.


                                                                             III



APARTMENT RIGHTS

2.9  If the building or complex of which the Leased Space is a part is or will
     be divided into apartment rights, the Lessee will be obliged to observe the
     rules ensuing from the deed of division, articles of association and
     regulations regarding use. The same holds if the building or complex is or
     will become the property of a cooperative.

2.10 The Lessor, in as far as it is able to do so, must not cooperate in the
     drafting of regulations which are in conflict with this Lease.

2.11 The Lessor must ensure that the Lessee has possession of the regulations
     regarding use referred to in paragraph 2.9 of these General Conditions.

PROHIBITIONS AND RULES OF PROCEDURE

2.12 The Lessee is not permitted:

     A.   to have environmentally hazardous items of property and/or goods in,
          on or in the immediate vicinity of the Leased Space, including
          malodorous, inflammable or explosive items, unless they are part of
          the normal stock in trade;

     B.   to place a higher load on the floors of the Leased Space and the
          building or complex of which the Leased Space is a part, than is
          structurally permissible or indicated in this Lease;

     C.   to use the Leased Space in such a way that this use causes soil
          contamination or other environmental pollution, damage to the Leased
          Space or damage to the appearance of the Leased Space, also including
          the use of means of transport which can damage the floors;

     D.   to make changes to or install facilities in or on the Leased Space
          which are in conflict with regulations of the government or utility
          companies, or with the conditions under which the owner of the Leased
          Space acquired the Leased Space or with other restricted rights, or
          which result in nuisance for other lessees or neighbourhood residents,
          or hinder their use.

2.13 Without prior written permission from the Lessor, the Lessee is not
     permitted:

     A.   to make changes to or install facilities in or on the Leased Space,
          also including drilling holes, however small they may be, in the
          external walls;

     B.   to introduce or have items and/or goods in, on or in the immediate
          vicinity of the Leased Space, including name signs, advertisements,
          boards, announcements, publications, structures, wooden structures,
          racks, packing materials, goods, machines,


                                                                              IV



          lighting, sun blinds, aerials with appurtenances, flagpoles and so
          forth, or to make windows opaque;

     C.   to enter or allow others to enter the service and system areas, flat
          roofs, roofs, gutters and areas and places of the Leased Space or
          building or complex of which the Leased Space is a part which are not
          intended for common use;

     D.   to perform acts relating to the central systems;

     E.   to park means of transport in places other than those designated for
          that purpose.

2.14 The Lessee must keep fire taps and fire hose reels, as well as escape
     routes in the Leased Space, free at all times, also those which serve as
     escape routes for other users of the building or complex of which the
     Leased Space is a part. In case of disasters, the Lessee must give any
     other users the opportunity to use the emergency routes designated for
     them, in so far as they are located in the Leased Space. Likewise, the
     Lessee will be entitled to use the escape routes designated for it, even to
     the extent they are not located in the Leased Space.

2.15 If a lift is part of the Leased Space, or the Leased Space is accessible by
     lift, the Lessee, its personnel and visitors will be able to use this life
     only at their own risk. All instructions, given and to be given by or on
     behalf of the Lessor, the lift installer or the government must be complied
     with precisely. The Lessor may - if and as long as this is necessary - put
     the lift system out of operation, without the Lessee being able to enforce
     a right to compensation or reduction of the rent.

2.16 If the Leased Space is part of a building or complex, the above-mentioned
     provisions will hold as well, in so far as they are applicable, for the
     areas of that building or complex which have not been leased.

2.17 The Lessor may attach conditions to its permission, and may withdraw its
     permission at all times, unless otherwise agreed.

ARTICLE 3 - SUBLETTING

3.1  Barring prior written permission from the Lessor, the Lessee will not be
     permitted to relinquish the Leased Space wholly or in part by renting or
     subletting it to or allowing it to be used by third parties, or to transfer
     its tenancy rights wholly or in part to third parties or transfer them to a
     partnership, company or legal entity, or to assign the tenancy rights, in
     so far as they belong to an undivided interest, in the event of division
     and distribution thereof.

3.2  Permission given by the Lessor will be once only and will not apply to
     other or following cases.


                                                                               V



3.3  The Lessor is entitled to attach conditions to its permission.

3.4  Irrespective of whether the Lessor has given permission, the Lessee,
     notwithstanding the liability of third parties, will be jointly and
     severally liable for compliance with the obligations under this Lease. The
     Lessee must ensure that a third party who acquires tenancy rights or rights
     of use also accepts the liability ensuing from this Lease for a lessee or
     user.

3.5  In case the Lessee acts in conflict with any provision of this Article, it
     will forfeit to the Lessor for each calendar day that the breach continues
     an immediately due and payable penalty, equal to twice the rent applicable
     to the Lessee at that time per day, without prejudice to the Lessor's right
     to claim performance or dissolution because of attributable failure, as
     well as damages.

ARTICLE 4 - RENT INCREASE

4.1  If it has been agreed in this that the rent will be increased periodically,
     this increase will be based on the annual price index for family
     consumption, series for employees' families with an income in 1985 below
     the wage limit for compulsory health insurance (1985 = 100), published by
     the Dutch Central Bureau of Statistics (CBS).

     The adjusted rent will be calculated according to the following formula:

     the adjusted rent is equal to the prevailing rent multiplied by the index
     number for the calendar year before the year in which the adjusted rent
     takes effect (A), divided by the index number for the calendar year before
     the commencement date of the prevailing rent (B), thus

                                            A
                         PREVAILING RENT X --- = NEW RENT
                                            B

4.2  The rent will not be adjusted if the adjustment would result in a lower
     rent than the last prevailing rent.

4.3  The adjusted rent will apply even if the Lessee has not been notified of
     the adjustment.

4.4  If the CBS discontinues the announcement of the aforementioned price index
     numbers, or changes the basis of their calculation, the most similar
     possible index number will be used.

     In the event of a difference of opinion on this, the party taking the
     initiative may request a decision by the director of the CBS which will be
     binding on the parties. Each of the parties will bear half of any costs
     involved in this.


                                                                              VI



ARTICLE 5 - END OF THE LEASE OR USE

5.1  At the end of this Lease, as well as upon termination of use, the Lessee
     must leave the Leased Space in its original condition, to the Lessor's
     satisfaction - this is the condition determined in the description drawn up
     and certified at the start, as referred to in paragraph 1.2 of these
     General Conditions, and, failing this, in the state it was in at the time
     of delivery - and deliver it to the Lessor in good condition, completely
     vacated, free of use and rights of use and properly cleaned, and hand over
     all keys to the Lessor. The Lessee must remove all items fitted by it in,
     to or on the Leased Space, or taken over by it from the previous lessee or
     user, at its own expense and risk, unless the parties agree otherwise in
     this regard. The Lessor will not owe any compensation for items not
     removed.

5.2  If the Lessee terminates use on time or prematurely without handing over
     the keys to the Lessor, the Lessor will be entitled to deem the Lease as
     terminated, gain access to the Leased Space at the Lessee's expense and
     take possession of it, without this giving the Lessee any right to
     compensation or otherwise.

5.3  All items and/or goods which the Lessee has apparently relinquished by
     leaving them behind in the Leased Space upon actually leaving the Leased
     Space may be removed by the Lessor at its discretion, without any liability
     on its part, at the Lessee's expense, unless the Lessor knows that the next
     lessee has taken over the items. In such a case, the Lessor will act with
     the Lessee's approval, and the parties will not consider this in conflict
     with Section 138 of the Dutch Criminal Code (Wetboek van Strafrecht).

5.4  The parties must inspect the Leased Space jointly in good time before the
     end of this Lease, record their findings in an inspection report and agree
     in writing in what way any repairs that proved necessary during the
     inspection and overdue maintenance, in so far as they are for the Lessee's
     account, will be carried out at the Lessee's expense and risk.

5.5  If the Lessee does not cooperate within a reasonable time with the
     inspection and recording, the inspection carried out by the Lessee and its
     recording of its findings will count as binding between the parties.

5.6  The Lessee must have carried out the repairs and maintenance mentioned in
     the inspection report which are at its expense and risk in good time before
     the end of this Lease, to the Lessor's satisfaction.

5.7  If the written agreement referred to in paragraph 5.4 of these General
     Conditions is not concluded within a reasonable time, as well as if the
     Lessee does not perform its obligations


                                                                             VII



     under that agreement or does not perform them sufficiently within a
     reasonable period set by the Lessor, after default, the Lessor will be
     entitled to have the work in question performed at the expense and risk of
     the Lessee.

5.8  Over the time involved in carrying out the repairs and overdue maintenance
     referred to in paragraphs 5.6 and 5.7 of these General Conditions, counting
     from the date of the end of this Lease, the Lessee will owe the Lessor an
     amount calculated according to the last prevailing rent and payment for
     additional supplies and services, without prejudice to the Lessor's claim
     for compensation of the further losses and costs.

5.9  The provisions of paragraphs 5.4 to 5.8 of these General Conditions will
     apply equally in case the inspection does not take place until after the
     Lessee has vacated the Leased Space.

ARTICLE 6 - DAMAGE AND/OR LOSS

6.1  The Lessee must take the necessary measures immediately to prevent and
     limit damage to the Leased Space - and to the extent it is able to do so,
     to the building or complex of which the Leased Space is a part and to
     adjacent buildings - such as damage due to short circuits, fire, leaks,
     storm, frost, influx and emission of gasses or liquids, including measures
     to prevent damage due to any weather conditions. The Lessee must also
     inform the Lessor immediately if such damage or an event as referred to in
     paragraph 6.3 occurs or threatens to occur.

6.2  The Lessee will be liable to the Lessor for any damage done and losses
     occurring to the Leased Space, unless the Lessee proves that it, the
     persons it has admitted to the Leased Space, its personnel and the persons
     for whom it is responsible are not to blame for this.

6.3  The Lessor will not be liable for injury caused to the person or damage
     done to the property of the Lessee or of third parties - and the Lessee
     indemnifies the Lessor for claims to this effect - through the occurrence
     and consequences of visible and hidden defects in the Leased Space or the
     building or complex of which the Leased Space is a part, or caused by the
     occurrence and consequences of weather conditions, inability to access the
     Leased Space, discontinuation of the supply of gas, water, electricity,
     heat, ventilation or air conditioning, failures of the systems and
     equipment, influx and emission of gasses or liquids, fire, explosion and
     other events, disruption of quiet enjoyment under the Lease and disruption
     of or shortcomings in the supplies and services, all this except in case of
     damage due to gross negligence or serious omissions of the Lessor in
     relation to the condition of the Leased Space or the building or complex of
     which the Leased Space is a part.


                                                                            VIII



6.4  The Lessor will never be liable for trading loss of the Lessee or for
     losses due to the activities of other lessees or to impediments to the use
     of the Leased Space which third parties cause.

ARTICLE 7 - INTERIM TERMINATION, DEFAULT

7.1  If the Lessee:

     -    does not pay the rent and make the payment for additional supplies and
          services at the stipulated times,

     -    discontinues its profession or business in the Leased Space wholly or
          largely,

     -    does not comply with any other provision of this Lease,

     -    does not observe any condition attached to permission granted by the
          Lessor,

     -    loses the free disposal over its assets or part thereof,

     -    if it is not a natural person, loses its legal personality, is
          dissolved or is actually liquidated,

     -    applies for suspension of payment or insolvency,

     -    is declared to be in a state of insolvency,

     -    offers a settlement outside insolvency or

     -    if the Lessee's property is attached,

     the Lessor will be entitled to cancel this Lease immediately in the interim
     or, if allowed by law, to declare this Lease terminated with immediate
     effect, without any notice of default being required.

7.2  The Lessee will be in default through the mere passage of a stipulated
     period, or through the mere occurrence of a circumstance as referred to
     above.

7.3  The Lessee must compensate the Lessor for all losses, costs and interest
     resulting from a circumstance referred to in paragraph 7.1 of these General
     Conditions and resulting from interim termination of this Lease, also in
     the event of insolvency and suspension of payment. The losses will, in any
     case, include the rent, payment for additional supplies and services,
     including energy costs, turnover tax (BTW, Dutch VAT) and other amounts due
     according to this Lease, until the original contractual end date of this
     Lease, the costs of reletting and all costs of judicial as well as
     extrajudicial measures taken by the Lessor, including those of legal
     assistance in connection with a circumstance as referred to in paragraph
     7.1 of these General Conditions.

7.4  The provisions of paragraphs 7.1 to 7.3 of these General Conditions do not
     exclude the Lessor's entitlement to exercise its other rights, including
     its right to claim performance with compensation, or dissolution with
     vacation and compensation pursuant to the provisions of the


                                                                              IX



     (new) Dutch Civil Code (Burgerlijk Wetboek), Book 6, Section 265 ff. or
     Section 39 of the Bankruptcy Act (Faillissementswet).

7.5  The Lessor will be entitled by operation of law and without judicial
     intervention to do (or have done) that which the Lessee has failed to do,
     as it sees fit and at the expense and risk of the Lessee.

ARTICLE 8 - BANK GUARANTEE

8.1  As a guarantee for proper compliance with its obligations under this Lease,
     upon signing this Lease, the Lessee must hand over a bank guarantee issued
     by a Dutch banking institution to the Lessor's satisfaction in the amount
     stipulated in this Lease, which relates to the Lessee's payment obligation
     to the Lessor, plus the prevailing turnover tax (VAT). This bank guarantee
     must also apply to the extensions of this Lease, including changes thereto,
     remain valid until three months after termination of this Lease and also
     apply to the legal successors of the Lessor.

8.2  The Lessee will not be able to claim setoff of any amount against the bank
     guarantee.

8.3  If a claim is made under the bank guarantee, the Lessee must provide for a
     new bank guarantee in the original amount at the Lessor's first request.

8.4  After an upwards adjustment of the rent and/or the prevailing turnover tax
     (VAT), at the Lessor's first request, the Lessee must immediately have a
     new bank guarantee issued in an amount adjusted to the new payment
     obligation, plus the prevailing turnover tax (VAT).

8.5  Prior to the start of each new lease period on the basis of an extension of
     the Lease, at the Lessor's first request, the Lessee must provide for a new
     bank guarantee in an amount adjusted to the new payment obligation, plus
     the prevailing turnover tax (VAT).

8.6  If the Lessee fails to comply with the obligations referred to in this
     Article, for each breach, it will forfeit to the Lessor an immediately due
     and payable penalty of NLG 500 (in words: five hundred guilders) per
     calendar day that it is in default after such default has been pointed out
     to the Lessee by registered letter.


                                                                               X



ARTICLE 9 - MAINTENANCE

9.1  Unless work is concerned that must be considered as minor and day-to day
     repairs within the meaning of the law, (new) Dutch Civil Code, Book 7A,
     Section 1619, or work on items which have not been fitted by or on behalf
     of the Lessor, the Lessor will be responsible for:

     A.   maintenance, repair and renewal of structural parts of the Leased
          Space, such as foundations, columns, beams, structural floors, roofs,
          flat roofs, bearing walls, outer walls (except for windows);

     B.   maintenance, repair and renewal of stairways, steps, wiring, plumbing,
          drains, gutters, exterior window frames and suchlike, without
          prejudice to the provisions of paragraph 9.2, subparagraph f., of
          these General Conditions;

     C.   repair and renewal of systems, such as the elevator, central heating
          and pressure water system - in and in so far as present in the Leased
          Space;

     D.   outside painting.

9.2  The Lessee will be responsible for all other maintenance, repair and
     renewal, such as:

     A.   interior maintenance, not being maintenance as referred to in
          paragraph 9.1 of these General Conditions, as well as exterior
          maintenance, if and in so far as work is concerned that must be
          considered as minor and day-to-day repairs within the meaning of the
          law, (new) Dutch Civil Code, Book 7A, Section 1619, all this without
          prejudice to the further provisions in this context;

     B.   the costs of the service subscription for systems serving the Leased
          Space or the building or complex of which the Leased Space is a part,
          such as an elevator, pressure water or central heating system - if and
          in so far as applicable and present in the Leased Space - or at least
          in so far as those costs are due for:

          -    carrying out periodic preventive maintenance, including
               inspection activities and keeping moving parts in working order
               (corrective maintenance);

          -    replacing parts which are subject to fast wear and tear and have
               to be replaced during almost every service;

          -    remedying failures outside normal office hours;

          -    making minor repairs;

          -    everything that can be considered minor and day-to-day
               maintenance within the meaning of the law, (new) Dutch Civil
               Code, Book 7A, Section 1619;

     C.   replacement of similar bulbs, broken (plate) glass windows, glass
          doors and glass walls by similar items;

     D.   maintenance of boundary partitions, gardens and yards - if and in so
          far as applicable and belonging to the Leased Space;

     E.   maintenance, repair and renewal in similar versions of hinges and
          locks, taps, switches, sockets, bell systems, lighting (including
          fittings), sun blinds, floor covering,


                                                                              XI



          upholstery, windows, interior painting, sinks, sanitary facilities,
          mirrors, toilet cisterns - if and in so far as applicable and present
          in the Leased Space;

     F.   cleaning of the Leased Space, both interior and exterior, also
          including cleaning windows, frames and external walls, cleaning
          gutters and sweeping chimneys at least once a year, as well as
          unblocking pits, sewers and drains;

     G.   maintenance, repair and renewal of items not fitted by or on behalf of
          the Lessor;

     H.   maintenance, repair and renewal, which are necessary because of acts
          or omissions of the Lessee itself, its personnel, of those for whom it
          is responsible and those whom it has admitted to the Leased Space.

9.3  If, after a warning, the Lessee fails to carry out maintenance, repair or
     renewal at its own expense - or if, in the Lessor's opinion, this has been
     carried out injudiciously or poorly - after default, the Lessor will be
     entitled to carry this out (or have this carried out) at the Lessee's
     expense and risk. If work for which the Lessee is responsible cannot be
     postponed, the Lessor will be entitled to perform this work (or have it
     performed) immediately at the Lessee's expense and risk.

9.4  If the Lessor considers it necessary to carry out maintenance, repair,
     renewal or other work (or have it carried out) on the Leased Space or the
     building or complex of which the Leased Space is a part, or on adjacent
     premises, or if this work is necessary in connection with requirements or
     measures of the government or utility companies, the Lessee must allow the
     persons who are needed to perform that work and take those measures to
     enter the Leased Space and tolerate such work and measures and the
     accompanying inconvenience, without being able to claim any compensation or
     reduction of the payment obligation or dissolution of this Lease, even if
     all this lasts longer than forty days. If possible, the Lessor will consult
     with the Lessee about the time of performance of the work.

ARTICLE 10 - ACCESS OF THE LESSOR

10.1 The Lessor and all persons to be indicated by it will be entitled to enter
     the Leased Space at all times - except in emergencies - after prior
     notification, on working days between 8.00 a.m. and 5.30 p.m. to inspect
     the condition of the Leased Space, for the work and measures referred to in
     paragraphs 1.2, 2.8 and Article 9 of these General Conditions and for
     valuations.

10.2 In the event of the intended sale or auctioning of the Leased Space, and
     for six months before the end of this Lease, the Lessee, without any
     compensation, for at least two working days a week, after prior
     notification by the Lessor or its authorised representative, must allow the
     opportunity to visit the Leased Space and tolerate the customary "To Let"
     or "For Sale" boards or notices in, on or affixed to the Leased Space.


                                                                             XII



ARTICLE 11 - COSTS OF ENERGY AND SO FORTH

11.1 Over and above the rent, the Lessee must also bear the costs of the
     consumption of water and energy for the Leased Space, including the costs
     of entering into a contract for supply and the meter rent, as well as any
     other costs and penalties charged by the utility companies. The Lessee
     itself must conclude the contract for supply with the bodies concerned,
     unless the Leased Space does not have any separate connections. In that
     case, the costs for the consumption of water and energy for the Leased
     Space will be charged to the Lessee by the Lessor.

11.2 If additional supplies and services have been agreed, the Lessor will
     determine the payment due from the Lessee on the basis of the costs
     involved in the supplies and services and related administrative work. If
     the Leased Space is part of a building or complex, and the supplies and
     services also relate to other parts belonging thereto, the Lessor will
     determine the share of the costs of those supplies and services which, in
     its reasonable opinion, is payable by the Lessee. In doing so, the Lessor
     will not have to take account of the circumstance that the Lessee does not
     use one or more of these supplies and services. If one or more parts of the
     building or complex of which the Leased Space is a part are not in use, the
     Lessor will ensure when determining the Lessee's share that it is not
     higher than it would be if the building or complex of which the Leased
     Space is a part were fully in use.

11.3 Each year, the Lessor will provide the Lessee with an itemised statement of
     the costs of the supplies and services, stating the method used to
     calculate them and, if applicable, the Lessee's share in those costs.

11.4 Any shortfall in the payments made by the Lessee, or excess received by the
     Lessor, which is evident from the statement for the relevant period, taking
     account of advance payments, will be paid or repaid within a month after
     the statement has been provided. Challenging of the correctness of the
     statement will not result in suspension of this obligation.

11.5 After consulting with the Lessee, the Lessor will have the right to limit
     or increase the supplies and services by type and scope. In connection with
     this or not, it may adjust the advance payment due from the Lessee for
     supplies and services to the costs expected by it.

11.6 In case the supply of heat or hot water is included in the supplies and
     services, the Lessor will have the right to adjust the method of
     determining the consumption and related Lessee's share in the costs of
     consumption after consulting with the Lessee. If consumption is determined
     on the basis of consumption meters, and a dispute arises over the Lessee's
     share in the costs of supply because these meters do not function correctly
     or at all, the statement of the presumed share by a firm consulted by the
     Lessee which specialises in the measurement and


                                                                            XIII



     determination of purchased heat will be binding. This also applies in the
     event of damage, destruction or fraud in relation to the meters, without
     prejudice to all other rights the Lessor has in that case vis-a-vis the
     Lessee, such as the right to repair or renewal of the meters and
     compensation of losses incurred.

ARTICLE 12 - COSTS

In all cases in which the Lessor has a warning, notice of default or writ issued
to the Lessee, or in case of legal actions against the Lessee to force it to
comply with this Lease or to vacate the Leased Space, the Lessee must reimburse
the Lessor for all costs made for this, both in and out of court - except for
the court costs to be paid by the Lessor pursuant to a final court decision. The
costs made will be set by the parties in advance at an amount that is not less
than the customary rate charged by court bailiffs.

ARTICLE 13 - PAYMENTS

13.1 The payment of the rent and everything due under this Lease must be made by
     the due date at the latest in legal Dutch currency - without any discount,
     deduction or setoff against a claim which the Lessee has or alleges to have
     against the Lessor, at the offices of the Lessor or by deposit or transfer
     to a bank or postal giro account to be indicated by the Lessor at a later
     date. The Lessor will be at liberty to make changes to the place or manner
     of payment after notifying the Lessee of this in writing. The Lessor is
     entitled to determine the outstanding debt under this Lease from which the
     payment it received from the Lessee will be deducted.

13.2 If an amount due from the Lessee on the basis of this Lease is not paid
     promptly by the due date, the Lessee will forfeit to the Lessor, by
     operation of law, for each case in which it is in default of this, from the
     due date, an immediately due and payable penalty of 2% per month of the
     amount due, with a minimum of NLG 250 (in words: two hundred fifty
     guilders) per calendar month, whereby each month which has started will
     count as a full month.

ARTICLE 14 - TAXES, CHARGES, LEVIES, PREMIUMS AND SO FORTH

14.1 Even if the Lessor is assessed for this, the following will be payable by
     the Lessee:

     A.   the property tax for the actual use of the Leased Space and - if and
          in so far as applicable and present - the actual shared use of service
          areas, common areas and so-called communal spaces;

     B.   other existing or future taxes, municipal taxes on encroachment on or
          above public land, charges, levies and charges relating to the Leased
          Space and the Lessee's property;


                                                                             XIV



     C.   environmental levies, including the surface water pollution levy and
          the contribution to the waste water purification costs and amounts on
          the basis of environmental protection in any other levy.

14.2 If in connection with the nature or conduct of the Lessee's profession or
     business, a higher than normal premium for the Leased Space or the building
     or complex of which the Leased Space is a part is charged to the Lessor or
     other lessees of the building or complex of which the Leased Space is a
     part for fire insurance for the building or equipment, the Lessee must
     compensate the Lessor or those other lessees for the amount over and above
     the normal premium. The Lessor and other lessees will be free to choose the
     insurance company or companies, to determine the insured value and to
     assess the reasonableness of the premium due.

14.3 The Lessee must take out satisfactory insurance against trading loss and
     third-party liability for its profession or business and maintain it by
     regular payment of the premium. If desired, the Lessee must show the Lessor
     the premium receipt.

ARTICLE 15 - SEVERALTY

15.1 If different (natural or legal) persons have bound themselves as Lessee,
     they will always be severally liable to the Lessor, each for the whole, for
     all obligations under this Lease, and they will not have the right to rely
     on the provisions of the (new) Dutch Civil Code, Book 6, Section 9
     subsection 2.

15.2 The obligations under this Lease are indivisible, also with respect to
     heirs and assignees of the Lessee.

ARTICLE 16 - LATE AVAILABILITY

If the Leased Space is not available on the agreed commencement date of the
Lease, because the Leased Space was not ready on time, the former user did not
vacate it in good time or the Lessor has not yet obtained the government permits
which it is to provide, the Lessee will not owe any rent until the date on which
it becomes available, and its other obligations and the agreed periods will be
deferred accordingly. If possible, the Lessor must inform the Lessee of the
threatening delay at least a month in advance.

The Lessor will not be liable for any losses whatsoever which the Lessee incurs
or could incur if the delivery of the Leased Space cannot take place on the
agreed date.


                                                                              XV



The Lessee may not claim dissolution, unless the late delivery was caused by a
deliberate act or omission by the Lessor and results in such a delay that the
Lessee cannot reasonably be required to continue this Lease (unchanged).

ARTICLE 17 - ADDRESS FOR SERVICE

The Lessee elects the Leased Space as its address for service for everything
relating to this Lease.

Drawn up and signed in triplicate
place: (postcode 4153 AG) BEESD         place: (postcode 3900 AH) VEENENDAAL

The Lessor:                             The Lessee:
KROEZEN VASTGOED EXPLOITATIE B.V.       ACT SIGMEX B.V.
(signature)                             (signature)


- -------------------------------------   ----------------------------------------
S.E. KROEZEN                            J.G.M. VELTMAN

on 14 April 1993                        on 8 April 1993


                                                                             XVI