This is a great condition pocket slide rule, the Faber Castell 67/22 Disponent (Commercial for the trader), in the original box with manual (German) and in the original signed leather case. The slide rule is in close to new condition with only a name signed under the slider, besides that there are minimal signs use and age. It measures ca. 16 cm or ca. 6 1/4 inches. Check the attached video on how to work your vintage man tool : slide rule operation instructions!
