Aristo 852 Volume pocket slide rule 1960 Germany

This special slide rule comes in the original leather sleeve (unsigned) both made by Aristo from Germany. This model is the 852 Dämpfungs (volume dampening) slide rule. A special slide rule made for the calculating Neper to DB and how these interact with (mili) voltage. For this it has very specific scales on the front and on the back of the slider. Curser and rule are complete there are only small signs of normal use on the slide rule and cursor. The sleeve is good condition with small scuffs from storage. The slide rule is marked 1960. It measures only ca. 15 cm or 6 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!