6 v (4x AAA batteries).
Display is 8 digits, red LED.
4 functions, %.
Main Integrated Circuit - Texas Instruments TMS0803NC (here date coded 1974 week 37).
54 mm x 120 mm x 17 mm (2.1" x 4.75" x 0.7").
Made in Hong Kong.
Similar in size to the Sinclair Cambridge models.
Inside showing the upper circuit board carrying the LED display made of three 3-digit sections, each with magnifying lenses, and the display driver IC (National Semiconductor DM8864N) connected to the lower board with the calculator IC, Texas Instruments TMS0803NC.
Grateful thanks to Laurence Howard for donating this calculator for display in the collection.
Vintage British Calculators
© Text & photographs copyright Nigel Tout 2000-2020 except where noted otherwise.