#4005 • Gilson Slide Rule Co. "The Midget" Circular Slide Rules

Part of October '26 Consignment (timed auction by The Swicegood Group)

High bid $14.00

Status: Sold

Gilson Slide Rule Co. "The Midget" 4-inch metal circular slide rules accompanied by an illustrated paper mailing envelope incorporate concentric mathematical, trigonometric, and degree scales around a central decimal equivalent chart. Fastened with central metal screw assemblies and pivoted translucent cursor indicator arms, the discs bear markings from Niles, Michigan and Stuart, Florida with a 1919 copyright and January 17, 1922 patent date.