Faber Castell 67/87 Rietz slide rule full set 1960 Germany

This is a great condition pocket slide rule, the Faber Castell 67/87 Rietz, in the origina, with manual and even the plastic it was wrapped in is still in the box. It comes in the original green sleeve that is signed Siemens, as is the back of this simple slide rule. The slide rule is in close to new condition with minimal signs use and age (minimal yellowing). 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!