Aristo 10111 Crownflex Klingspor pocket slide chart 1954 Germany

Interesting slide chart by Aristo with number 10111. This plastic slide rule was made for the C. Klingspor Company in Germany in 1956. Specially made for the Crownflex cut-off disc they produced. Besides English, also the German and French language can be found on the chart, though not everything is translated in each language. There are only a few selections with values on the front. The back of the pull out also has measurements in inches and mm. everything is n great condition with minimal signs of use and age, no dedicated case or instructions. It measures ca. 20 cm or 8 inches long. Do check the video below on how to work your vintage man tool : slide rule operation instructions!