K&E 68-2047 Log Log Duplex Decitrig Slide Rule with Case Manual USA

Specifications

Vintage Keuffel & Esser K&E Log Log Duplex Decitrig slide rule, No. 68-2047 (old No. 4187S), made in U.S.A. Includes the original black carrying sleeve, green K&E Slide Rule Manual booklet, care pamphlets, and original storage box. Classic engineering/scientific calculator tool produced by Keuffel & Esser before electronic calculators became standard. Features multiple duplex scales with clear cursor window and precision engraved markings. A desirable display and collector piece for engineering, mathematics, drafting, or scientific instrument collections. Please note that the manual is folded since it was stored that way in the box.

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