History of Home(No. 15)

Ricoh Watch Co., Ricoh Keiki Co. Ltd., リクォーツ - Unofficial Riquartz Database

Analog watches

Digital LCD & LED watches

Quartz Timer timing & testing machine

Technical†

Some images of technical manuals can be seen in Technical

Stamped inside caseback; Year & 1-9 then XYZ, example "75-2" = Feb 1975, "77-Y" = November 1977

Some watches also have a code in addition, which looks like the date in the Showa calendar, but which does not correlate with the date code above.

I would be grateful to receive information, especially the early 550 and 570 watches email to: jr AT umddb DOT net

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