Faber Castell Chemie Verlag slide rule 1970 Germany

In the original paper sleeve with booklet, comes this unusual pocket slide rule by Faber Castell, model Verlag Chemie. Double sided made to calculate (in)organic chemical analyses and also to be used as a standard slide rule with various basic and elaborate scales. The rule, sleeve with manual are all in good condition (small tear in sleeve part) with only small signs of use and age (some yellowing between the lines) on the rule. The sleeve measures 22 cm or 8 3/4 inches long. The Faber Castell Chemie Verlag slide rule is made similar to the specs of the model 63/83. Check the attached video on how to work your vintage man tool: slide rule operation instructions!