Keuffel Esser 68 1215 log log duplex decitrig rule full set 1968 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 sealed in plastic. The card board box did it’s job well in protecting everything inside and only sufferd a bit from storage. The box is complete as is the plastic inside, with only a few scuffs on 2 small tears. 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!