Check the listing for details. Vintage Keuffel & Esser Co 4083-3 Log Duplex Vector Slide Rule w/Case & Instruct. Condition: Used. Listed at 100.00 USD. Vintage Keuffel & Esser (K&E) Model 4083-3 Log Log Duplex Vector 10” slide rule Copyright 1947 Comes with Operating Instructions and Original Case. Case has writing on back. Shown in pic Operating Instructions are brittle with age
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