Title
Circular Slide Rule
Identifier
ABDNP:201863a
Description
Fearns Circular Slide Rule, in a plastic case marked, "CIRCULAR SLIDE RULE", consists of a main dial, a transparent top dial and a moveable cursor to facilitate reading the scales. Also has manual in case.
Date
1959-1969
Format
Diameter 125 mm
Plastic
Coverage
West View Terrace, Dunston, Gateshead, NE11 9EL
Creator
Fearns Calculations