Vintage British Calculators

Home > Prinztronic

Prinztronic M300

Prinztronic M300

Prinztronic M300

9 v (PP3 battery).

Display is 8 digits, red LED.

4 functions, %, memory.

Integrated circuit: Texas Instruments TMS0972NL.

73 x 127 x 25 mm (2.9 x 5.0 x 1.0").

"Made in British Hong Kong".

Stamped "26 APR 1978".

Inside

With the rear cover removed showing the circuit board.
This looks very bare because advances in electronics by 1978 had allowed all of the calculator electronics, including display drivers and clock circuitry, to be put into one integrated circuit.

Vintage British Calculators

Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2024.