VEB Mantissa TRS-mini pocket machine time slide rule sleeve 1970 GDR Germany

This is a pocket size German made Machine time slide rule, named the Technische Rechenstab (TRS) für Machinegrundzeit und Leistung, translated as the Technical slide rule for machine timing and machine performance. It was made by VEB Mantissa from the GDR/DDR (Eastern Germany) in the 1970’s. This full plastic slide rule comes in an original sleeve both signed WMW / Niles. Besides the many dedicated scales on the front it also has additional tables on the back. It has standard body with simple cursor and it measures ca 16 cm or 10 1/4  inches. It is in great condition hardly any signs of use and age. There was also an additional slide rule called the “Masse” for measurements, which you can see here and a larger version that you can find here. Do check the attached video on how to work your vintage man tool : slide rule operation instructions!