Vintage British Calculators

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Prinztronic Mini 7

Prinztronic Mini 7

Prinztronic Mini 7

6 v (4x AAA batteries).

Display is 8 digits, red LED.

4 functions, %, square root.

Main Integrated Circuit - Texas Instruments TMS0807NL (here date coded 1975 week 23).

54 mm x 120 mm x 17 mm (2.1" x 4.75" x 0.7").

Made in Hong Kong.

About 1975.

Similar in size to the Sinclair Cambridge models.

Prinztronic Mini 7 inside

Inside showing a circuit board carrying the LED display, with the array of magnifying lenses, and the display driver IC (National Semiconductor DS8855N) connected to the board with the calculator IC, Texas Instruments TMS0807NL.

Vintage British Calculators

© Text & photographs copyright Nigel Tout   2000-2019  except where noted otherwise.