Antique Computing Instrument Collection - Keuffel Esser Slide Rule 4081-3

As shown in the above picture, this Log Log Duplex Decitrig slide rule comes complete with the cardboard box, leather case, and instructuction manual, all in very good condition.

The serial number of the slide rule is 361702, and the final copyright date on the manual is 1955, therefore according to the dating curve this rule is dated to c1958.

Two side views of the rule | Slider Extended View | Box Overview