VINTAGE KEUFFEL & ESSER INSTRUCTIONAL LEARNING TO USE THE K12 PREP SLIDE RULE

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VINTAGE KEUFFEL & ESSER INSTRUCTIONAL LEARNING TO USE THE K12 PREP SLIDE RULE :
$6.95

DEEPLY DISCOUNTED!
DESCRIPTION
This manual is for the Keuffel & Esser Pocket K12 Prep Slide Rule. It was published with copyrighted in 1961. All 21 pages are in perfect condition. There are no observable scribbles or other use conditions.
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