Got a few old calculators/watches from the 70`s and alot of Sinclair propaganda.
Sinclair Cambridge (type 3).
8 digits, red LED.
4-functions, constant.
Has [C/CE] (one press clears last entry and two presses clears everything) and [K] (constant) keys.
6v (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.
A later, more common, version of the Cambridge.
Will update pics etc when time suits.
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