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Ricoh RICOHMAC 1200 |
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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. |
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The two circuit boards removed. On the left are the six integrated circuits by American Micro-systems Inc (AMI). |
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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. |
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Vintage Calculators |
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© Text & photographs copyright Nigel Tout 2000-2008 except where noted otherwise. |
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