Keuffel Esser 68 1210 new 4081-3 Duplex DeciTrig slide rule case 1960 USA

This is a quality build slide rule with elaborate calculation options. This great rule also come in the original box with the original leather case as well as additional paperwork and manual. This model 68 1210 is from the 4081-3 family and in very good condition. From the late 1960’s. This black card board box is the latest variant and has only a few signs of storage and is complete, interior plastic has several tears. The slide rule itself has small signs of age but is in overall very good condition. The leather storage case is unused but has a tear on the bottom. The manual is in great condition. This log-log duplex deci-trig measures 32 cm or 13 inches long. Check the attached video on how to work your vintage man tool : slide rule operation instructions!