Sinclair Cambridge Type 3
Sinclair Cambridge - Type 3. Has [C/CE] (one press clears last entry and two presses clears everything) and [K] (constant) keys.
8 digits, red LED. 4-functions, constant. Powered by 6v battery (4 x AAA). Main integrated circuit - General Instruments Microelectronics GIMT-CZ550, here date coded to the end of 1975. 50 mm x 111 mm x 28 mm (2" x 4.4" x 1.1"). Made in England.
Internal photographs courtesy of http://www.vintagecalculators.com/
Our calculator was very kindly donated by Francis Hookham.
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This exhibit has a reference ID of CH2885. Please quote this reference ID in any communication with the Centre for Computing History.