This pocket slide rule comes in the original signed leather sleeve, both made in Germany by Nestler. This model is the elaborate Polymath-Duplex, nr. 0129 with 24 scales on both sides. The Nestler name and model is on the rule itself, on the sleeve (just Nestler). The rule is completly made of plastic but still has the metal sided cursor with multiple hairlines. Curser, slide rule and sleeve are complete and in good condition with small signs of use. It measures ca. 17,5 cm or 7 inches. Check the attached video on how to work your vintage man tool : slide rule operation instructions!
