Details and Image
|Date||Scale Length||Area of Use
|Linear||Relay / SIC 153||Relay||Japan||Celluloid over bamboo||1960's||25 cm||Engineering
Notes: "This is a very nice Relay Model 153 slide rule, with “Scientific Instruments Co.” stamped on one edge. Normally the SIC name takes pride of place on their slide rules, usually in two or three places, with no mention of Relay (the actual maker) on the rule at all. This one may have been made near the beginning of SIC’s relationship with Relay/Ricoh. "