Pocket slide rule Nestler Rietz NMIB 1970 Germany

Quality Pocket slide rule by the German company Nestler. This is the model Rietz from the 1970’s. It comes as a complete set in the original leather signed sleeve with box and manual (German). It measures ca. 16 cm or 6 1/4 inches long. The slide rule and the slider are made of plastic. Everything is in very good condition with hardly any signs of use and age but there is a faint red stain on the right side. Check the attached video on how to work your vintage man tool : slide rule operation instructions!