Sinclair Enterprise (Early Prototype Model)

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Early prototype model of the Sinclair Enterprise calculator. There is a label inside the battery compartment that says 'Prototype No. 1'. The IC is a General Instruments C689DL that is dated week 01 1977.

The Sinclair Enterprise was a four-function calculator with percentage, memory, and square root functions. It was released in October 1977. It was bigger than the calculators in the previous Cambridge range, and featured red LEDs for the display screen. It featured the General Instruments C689D chip. The Enterprise Programmable was later released in 1978.

This unit came from Chris Wilding, formerly of Sinclair Radionics and Sinclair Electronics Ltd.

Manufacturer: Sinclair Radionics
Date: 1976

Other Systems Related To Sinclair Enterprise (Early Prototype Model):

Item Manufacturer Date
Sinclair Executive Type 2 Sinclair Radionics 1972
Sinclair Executive Type 1 Circuit Board Sinclair Radionics 1972
Sinclair Executive Type 1 Sinclair Radionics 1972
Sinclair Executive Memory (Possible Development Model) Sinclair Radionics 1973
Sinclair Executive Memory (Development Model) Sinclair Radionics 1973
Sinclair Cambridge (Type 1) Sinclair Radionics July 1973
Sinclair Oxford 100 (Type 1) Sinclair Radionics 1975
Sinclair Cambridge (Type 3) Sinclair Radionics 1975
Sinclair Scientific Programmable Calculator Sinclair Radionics 1975
Sinclair Oxford 200 (Type 1) Sinclair Radionics 1975
Sinclair Oxford 200 (Type 2) Sinclair Radionics 1975
Sinclair Oxford 200 (Type 1 - Early Style) Sinclair Radionics 1975
Sinclair Oxford Universal Sinclair Radionics 1975
Sinclair Oxford 300 (Type 2) Sinclair Radionics 1975
Sinclair Cambridge (Type 4) Sinclair Radionics 1975
Sinclair Sovereign (Gold) Sinclair Radionics 1976
Sinclair Sovereign (Black) Sinclair Radionics 1976
Sinclair Cambridge Scientific Calculator Sinclair Radionics 1976
Sinclair Enterprise (Possible Prototype Model) Sinclair Radionics 1977
Sinclair Sovereign (Silver Jubilee) Sinclair Radionics 1977
Sinclair Enterprise Programmable Sinclair Radionics 1978

This exhibit has a reference ID of CH66637. Please quote this reference ID in any communication with the Centre for Computing History.

  

Sinclair Enterprise (Early Prototype Model)


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