Relay Ricoh / SIC (Scientific Instrument Co.) 1570
Relay / Ricoh
Japan
Celluloid over bamboo
1960's
25 cm
Engineering
Notes: "The Model 1570 was SIC’s “Intermediate Electrical Engineering” slide rule, and like all of SIC’s straight (vs. circular) slide rules, it was made by Relay / Ricoh in Japan. "
