Sinclair Sovereign (Black)

The Sovereign was one of the last calculators to be released by Sinclair Radionics before the company was split up and sold off by the National Enterprise Board. Released in 1976 the case was made of pressed steel and available in a variety of styles, including black painted, chrome plated, silver plated, and gold plated. Desinged by John Pemberton it won a Design Council Award in 1977.

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