5.17 Relay-Ricoh, Japan

Following World War II, Nippon Slide Rule Company (1948 to 1950), later San-Ai Kekki Ltd. (1950 to 1958), produced Relay slide rules which were exported to the USA as Relay Industries. In 1958 the company became San-Ai Measuring Instruments. In 1963 the San-Ai Group joined Riken Optical Co., which eventually became a part of Ricoh Ltd. Ricoh supplied slide rules to many companies in the USA and Europe, such as Compass, Lafayette, Lutz, Sans & Streiffe, Staedtler Mars, and others.

Sans & Striefe Model 312.

Total number of Relay/Ricoh slide rules in the collection: 4. \(~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\)

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