#4004 • Slide Rules, Folding Rulers, Cases, and Reference Books

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

High bid $14.00

Status: Sold

Collection of measuring instruments and reference materials including a K&E Polyphase slide rule model 4053-3 by Keuffel & Esser Co. with black snap case, a Dietzgen slide rule, and a T. Rabone & Sons No. 1638 folding rule made in England. Accompanying items include fitted cases, wooden rules, a copy of "The Slide Rule Simplified" by Geo. W. Richardson dated 1912, and Florian Cajori's "A History of the Logarithmic Slide Rule and Allied Instruments."