Calculators sold by Sumlock and made by other companies
Plusograph

Plusograph

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.

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Text & photographs copyright © 2002 - 2023 Nigel Tout, except where noted otherwise.