Faber Castell Statistik 3/11 concrete slide rule container 1950 Germany

This larger slide rule comes in the original signed container and was made by Faber-Castell from Germany in the 1950’s. This model is the 3/11 Statik Duplex. It has special scales on front for iron and concrete calculations as well as a cursor with 2 sides to use on the bottom small side of the rule. On the back it has tables in German for Iron bars and concrete formulas. Everything is complete and in very good condition. There are signs of normal use and age only (minimal yellowing to the laminate). The case is also complet and both sides are branded correctly (minimal signs of use). It measures an extra long 38,5  cm or 15 1/4 inches. Check the attached video on how to work your vintage man tool : slide rule operation instructions!