Aristo projection slide rule 168 Studio box 1960 Germany

This special slide rule comes in the original and complete cardboard box with manuals. Made by Dennert & Pape KG from Germany. This model is the elaborate 168 for the Aristo Studio range (868/968/1068), a special slide rule made for use in the classroom as a teaching aid to be placed on a overhead projector or other beam / light source. It is a very high quality build with a slider and a moving cursor, all made out of separate pieces of Perspex with 6 different language printed on the sides. All parts are complete, it is working great and there are only minimal signs of use and age. The green-grey box is complete and in good condition as well. It also includes the original quality control slip. It measures ca 38 cm x 17 cm or ca. 15  x 7 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!