Calculators sold by Sumlock and made by
10-key mechanical add-lister, switchable between decimal and Sterling currency.
Introduced in 1969.
This machine appears to be identical with a Commodore model introduced at the same time, as shown below:
If you have further information about the Plusograph (especially photographs), the development of Anita calculators, or know of somebody who worked there, please get in touch with me.
Plus & Sumlock Mechanical Calculators
Text & photographs copyright © 2002 - 2021 Nigel Tout, except where noted otherwise.