Check the listing for details. Keuffel & Esser K&E 4081-3 Log Log Duplex Decitrig Slide Rule w/ Case. Condition: Used. Listed at 29.99 USD. This particular model features theN4081-3 designation and includes the original black leather carrying case. •Model: 4081-3 (Log Log Duplex Decitrig). • (1) Keuffel & Esser 4081-3 Slide Rule. •Case: Includes the original black leather sheath.
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