Graphoplex 699 Decilog duplex slide rule full set 1970 France

This slide rule comes in the original leatherette sleeve, branded and marked with the number 699 as well as the manual and addition sheet, all made by Graphoplex from France. This model is the 699 Decilog Duplex with 22 scales. The rule itself is made of plastic, as well as the cursor. Curser and slide rule are complete and everything is in very good condition with only small signs of normal use and age, the manual shows signs of use /storage and bad folding. The slide rules measures 33 cm or 13 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!