Nestler 33 Chemiker slide rule in case 1930 Germany

This interesting slide rule that was made by the German company Nestler. This is the model 33 made for calculating chemical reactions. It comes in an original leather Nestler signed holder. It measures ca. 29 cm or 11 1/2 inches long. The slide rule is made of mehogany wood, the slider is made of glass and metal. All parts are complete and it is in working order. The middle part can be reversed for more calculations. It has some signs of age and use but not a lot, no chips, back is good as well. Check the attached video on how to work your vintage man tool : slide rule operation instructions!