British Calculators

Home > British Calculators > Sinclair

Sinclair Enterprise
Sincalir Enterprise calculator

Sinclair Enterprise.

Display is 8 digits, red LED.

4 functions, %, memory, square root.

9v (PP3 battery).

Integrated circuit - General Instruments C689G, here date coded mid 1977.

Made in England.

1977.

Notice the large size of the LED digits, which are among the biggest used on a hand-held calculator. By this late date the cost of LEDs had fallen considerably and large digits were cheaply available. They are further enhanced by the magnifying lenses in front, a common feature. Compare the display on this Sinclair Enterprise with the Enterprise Programmable which has the usual size LED digits.

Sincalir Enterprise calculator without cover

Unusually, like it's stablemate, the Enterprise Programmable, the whole of the front cover unclips to replace the battery.
Inside Inside

With the keyboard removed, showing the larger than normal magnifying lens array in front of the LED digits.

The General Instruments C689G integrated circuit.
Home
Abatron
Addo
Advance Electronics
Ajax
Boots
Busicom / Broughtons
Calate
Caltec
Commodore
Data Devices
Decimo
Exactus
Geller
Gemini
Gross
Guy's Calculating Machines
Hanimex
House of Fraser
Imperial & Royal
Invicta
Memory Devices
Muldivo
Okhai
Phytron
Plustronics
Prinztronic
Pye
Radofin, Taktile & Triton
Rockwell
Sinclair
Tealtronic
Texet

Sinclair models
Cambridge models
Cambridge Memory models
Cambridge Scienific
Camb. Programmable
Cambridge Universal
Enterprise
Enterprise Prog
Executive
Executive Memory
Oxford 100/Gillette GPA
Oxford 150
Oxford 200
Oxford 300
Oxford Scientific
Oxford Universal
President
President Scientific
Radionic
Scientific & Giant Scientific
Scientific Prog.
Sovereign
Wrist Calculator
The Sporting Life SETTLER
PDM35 Multimeter

Vintage Calculators

© Text & photographs copyright Nigel Tout  2000-2008 except where noted otherwise.