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".
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.
Prinztronic models
Vintage Calculators
© Text & photographs copyright Nigel Tout 2000-2019 except where noted otherwise.