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 second variation out of three known variations which dates from around 1975/1976.

The Sinclair Cambridge Memory Type 2 differed from the Type 1 as it included a % key, and had a silver case with black trim. It featured the same General Instruments C595 processor as the Type 1. The chip in this calculator in our collection is dated week 33 of 1975.

It was powered by two AAA batteries, instead of the 4 AAAs for the Type 1 and a PPP3 battery for the Type 3, making the Type 3 one of the bulging "pregnant" models.

Manufacturer: Sinclair
Date: 1975

This exhibit has a reference ID of CH70695. Please quote this reference ID in any communication with the Centre for Computing History.

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