April 24, 2024
Vintage 1947 Keuffel & Esser 4181-3 Slide Rule with K&E Case
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Vintage 1947 Keuffel & Esser 4181-3 Slide Rule with K&E Case – Marked “Copyright 1947 By Keuffel & Esser Co.” “4181-3”. This is a plastic slide rule with scale arrangement as on the log log duplex decitrig. Case is stamped with the K&E logo. Both are in very good to excellent condition.
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