Sinclair Cambridge Universal
Sinclair Cambridge Universal.
Display is 8 digits, red LED (made by National Semiconductor).
4-function, %, memory, square, square root.
9v (PP3 battery).
Integrated circuit - Mostek MK50321A, here date coded to late 1977.
50 mm x 111 mm x 28 mm.
Made in England.
A "pregnant" model with a bulge in the back to accommodate the thickness of the PP3 battery.
Sinclair models
Vintage Calculators
© Text & photographs copyright Nigel Tout 2000-2019 except where noted otherwise.