The Sinclair Cambridge series of calculators was introduced in Summer 1973, and was the second calculator from Sinclair Radionics after the Executive was released in 1972. On release the Executive was the world's slimmest calculator, measuring a third of the size of other calculators available at the time. The Sinclair Cambridge was another small-sized range of calculators, and truly pocket-sized.

There was a number of different models in the Cambridge range. This example in our collection is the Memory model, and is believed to be the first variation out of three known variations which dates from around 1974/1975.

The Sinclair Cambridge Memory Type 1 did not include a % key like the two later models, and had a black case with blue buttons. It featured the same General Instruments C595 processor as the Type 2.

It was powered by four AAA batteries, instead of the two AAAs for the Type 2 and a PPP3 battery for the Type 3, making the Type 3 one of the bulging "pregnant" models.

Manufacturer: Sinclair Radionics
Date: 1974

This exhibit has a reference ID of CH76654. Please quote this reference ID in any communication with the Centre for Computing History.

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