Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
Relay/Ricoh (Edmond Scientific) / 105
Celluloid over bamboo
1960's & 70's
25 cm

Notes: "Relay/Ricoh slide rules have probably been sold under more brand names than any other make, possibly at least 27 “brands. Edmund Scientific is one of the companies that sold Relay/Ricoh slide rules with their own name on them, but in this case the Relay name is also there. This slide rule is a Relay Model 105 simplex slide rule of the Rietz pattern."

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