Desk Electronic Calculators

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Ricoh RICOHMAC 1200

Ricohmac 1200

Ricoh RICOHMAC 1200

Display is 12 digits, green vacuum-fluorescent tubes.

4 function.

Main integrated circuits - Six medium scale integrated circuits by American Micro-systems Inc. (AMI), date coded about week 42 of 1970.

240 x 278 x 104 mm (9.5" x 11" x 4").

Made in Japan.

With cover removed
Rear view

View from the rear showing the two main circuit boards below the power supply section.

With the cover removed.

Circuit boards.

The two circuit boards removed. On the left are the six integrated circuits by American Micro-systems Inc (AMI).

Ricoh are well known camera and office equipement manufacturers who produced a small number of models of mechanical (see below), desk electronic, and hand-held electronic calculator variously in the period from the late 1960s to the early 1970s.

Founded in 1936 as Riken Kankoshi Co., Ltd. to make and sell photographic materials, it changed its name to Riken Optical Co., Ltd in 1938. In the 1960s the comapny developed rapidly and became Ricoh Co. Ltd. in 1963. It is still in business today and is a major manufacturer of office automation equipment.

In the UK Ricoh calculators were distributed by Decimo.

Ricoh Ricomac 218 1/2, electrically powered, mechanical, ten-key add-lister.

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2015 except where noted otherwise.