Circular slide rule (two cardboard discs with radial transparent plastic cursor) by General Industrial Co.1788 Montrose

Made:
1959-1960 in Chicago and Maywood

Circular slide rule (two cardboard discs with radial transparent plastic cursor) by General Industrial Co.1788 Montrose, Chicago 13,Illinois, also marked Slide Chart Corp., 1959, Perrygraf, Marywood, Illinois

Details

Category:
Mathematics
Object Number:
2001-12
Materials:
card, plastic, metal and complete
Measurements:
overall: 1.5 x 106 mm
type:
circular slide rule
credit:
Dr J. B. Harris