Calculators Marketed by
Sumlock Bondain
Sumlock
Bondain 320A
Sumlock Bondain 320A
The display is 12 digits green VFD (Vacuum-Fluorescent Display).
The calculator is powered by AC.
Main integrated circuit is Hitachi HD38401A, here date-coded 1979.
Four-function, square root, memory.
196 mm x 274 mm x 72 mm (7.7" x 10.8" x 2.8").
Made in Japan.
With the cover removed showing the simplified electronics of a desktop calculator of the late 1970s. The VFD display is very prominent with the Hitachi HD38401A calculator integrated circuit below on the left.
Calculators Marketed by
Sumlock Bondain
Text & photographs copyright © 2002 - 2023 Nigel Tout, except where noted otherwise.