Faber Castell 2x Novo Duplex 2/83 and 2/82 slide rule full sets 1970 Germany

Combination of 2 slide rules, the Duplex 2/82 and the Novo Duplex 2/83 (predecessor of the “N” execution). Both come in their complete hard plastic boxes with name. Both come with the original booklet as well. In the 1960’s these were amongst the best slide rules by Faber Castell. The rules and cursors are in good condition with small signs of age and use only. These large rules measures ca. 33 cm or 13 1/4 inches long. Both rules have the same design with reinforced end pieces en white plastic cursor edges. Check the attached video I found on YouTube on how to work your vintage man tool: slide rule operation instructions!