Hemmi 'Sun' No.40 RK (10-inch) slide rule with ca

Made:
1960-1970 in Japan

Hemmi 'Sun' No.40 RK (10-inch) slide rule with cardboard case

Details

Category:
Mathematics
Object Number:
1998-446
Materials:
cardboard, complete and plastic
type:
slide rule
credit:
Mr J.C. Michie