Faber Castell 63/83 Novo-Biplex slide rule complete set 1970 Germany

New in the box, comes this unusual pocket slide rule by Faber Castell, model 63/83 version. In the 1970’s these were amongst the best slide rules by Faber Castell. The slide rules come in the original signed outer box, signed  leather sleeve and with manual in Spanish. The manual reads Novo-Biplex but still has the 62/83 designation on it (seems Faber Castell forgot to change that when this rule was being released to market). The rule, sleeve, manual are all in good condition (light staining) with only small signs of use and age (some yellowing between the lines) on the rule. The box is complete and has storage signs and measures 22 cm or 8 3/4 inches long (tape on 1 flap on inside). Check the attached video on how to work your vintage man tool: slide rule operation instructions!