Keuffel Esser 68 1215 new 4081-3S 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 1215 is from the 4081-3 family and in mint condition, still comes in the opened plastic. From the early 1960’s. The card board box sufferd heavily from storage but is mostly complete. The slide rule has some signs of age. 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!