Polyphase Duplex Slide Rule: Model N4088S
Accession Number: 2010.lej.13
A 20″ polyphase duplex slide rule made of celluloid laminated on a mahogany surface. The cursor is made of glass with a metal frame and a single black marking line. Comes in a brown leather case. Scales: Front: K, A, B, S, T, C1, D, L. Back: DF, CF, CIF, C, D. Markings: 422652;
Primary Materials: Celluloid, Mahogany, Glass, Steel
Markings: Old inventory number = 13.
Length = 57 cm, Width = 5.2 cm, Height = 1.2 cm
Function: Facilitating calculations.
Item is in good condition. The glass cursor window is cracked. The cover of the leather case is damadged leaving the case open on one end.
Manufacturer: Keuffel and Esser Co., New York
Date of Manufacture: c. 1935-1938
Donated to UTSIC: No