This desk slide rule comes in a the original signed cardboard container, it reads Statos Stahlbeton n=10. It was made by Graphoplex from France in the German language. This model is named Statos and is specifically made for calculating concrete steel (Eisenbeton). It has scales on the front and back of the slider. Curser and rule are complete but there are clear signs of use on the back of the slide rule (partially faded) and some darkening on the front. It measures 29 cm or 11 1/2 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!