Commonwealth 12D /4

Brand: Commonwealth

The Commonwealth 12D /4 refers to a model of a pocket calculator that was produced by the British company, Sinclair Radionics, in the 1970s. It was part of the Commonwealth calculation machine series, with the 12D representing the year of its release (1972), and the /4 signifying its fourth revision. This popular calculator featured four functions: addition, subtraction, multiplication, and division, and utilized a ten-digit display. The device was widely used in various sectors, including finance, science, and engineering, due to its functionality and affordability.

• Drive: Idler Drive
• Motor: AC
• Control:
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• Suspension:
• Rumble: -50dB
• Wow and Flutter: 0.1% wrms
• Speeds: 16, 33, 45, 78 rpm
• Platter: 300 mm, 2.95 kg
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