Log-Log Slide Rule
A Boxed 6″ UNIQUE Log-Log Slide Rule made in wood with celluloid markings on front and back with trigonometrical ratios.
Period
Early to Mid 1900’s
Origin
Stamped “Made by Technical Supply Co Carden Avenue Brighton
Condition
Box has edge wear, ruler complete and good.
Size Box
172mm 
45mm 
14mm
