This complete set of slide rule, container, manual and card are made by Graphoplex from France. This model is the 690a Neperlog log-log. It has scales on both sides and 4 rubber feet on both sides as well. The rule itself is made of plastic, as well as the cursor which has several long and short hairlines on both sides. Curser and slide rule are complete and everything is in very good condition. It has a French instruction manual. The container is complete and in good condition with some storage mark. It measures 33,5 cm or 13 1/4 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!
