IWA 0378 KSB Pumpleistung Hydraulic Pumps slide rule 1970 Germany

Interesting slide rule by IWA model 0378 in German made for the KSB Company in the 1970’s. Can be used for calculation on pumps for all kinds of liquids, it has only special scales to this end, with the instructions on the inside below the 2 sliders. It comes with the original sleeve as well. It is in acceptable condition with clear signs of use (darkening to the wide front and back as well a small part missing from the cursor bottom (price adjusted accordingly). It is fully functioning with all parts intact. It measures ca 18 cm or ca. 7 1/4 inches long. Check the attached video on how to work your vintage man tool : slide rule operation instructions!