Graphoplex Statos pocket Concrete slide rule Roll-s pouch 1970 France

This pocket slide rule comes in a Roll-s signed leather pouch, this name is also found on the slide rule itself as Roll-s von Roll a Swiss Company called Von Roll. The S could be for their Seilbahnen ( aerial tramway division) or for Switzerland. It was made by Graphoplex from France in the French and German language. This pocket size model is name Statos and is specifically made for calculating concrete steel (Stahlbeton). It has scales on the front and back of the slider. Curser and rule are complete but there is a very small crack in the cursor (does not interfere with function). It measures 15,5 cm or 6 1/8 inches. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!