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Circa: 1947
Condition: Good+
Publisher: Keuffel & Esser Co.
This is a good used, copyright 1947, instruction manual marked on the cover "K+E MANUAL LOG LOG DUPLEX DECITRIG SLIDE RULE NO. N4081 KEUFFEL & ESSER CO.". This manual is in good condition with a minor cover page crease in the center, but the text is fine, in fact the page a white and clean. This manual is 5-1/4 x 7-3/4", 123 pages, of text, formulas, illustrations. Was a former private library book with card in front, never borrowed. All the pages are clean, no missing pages. Good+ overall condition.
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