Faber Castell 2x Novo Duplex 2/83N and 2/82N slide rule in box 1970 Germany

Combination of 2 slide rules Duplex and Novo Duplex in the “N” execution, complete with paperwork and rare latest edition green cardboard boxes. In the 1970’s these were amongst the best slide rules by Faber Castell. Both slide rules come in their original signed card board box (no designation). The rules and cursors are in great condition with some yellowing to the 2/82N rule only. They are all complete without any signs of use and complete with their individual manuals. These large rules measures ca. 33 cm or 13 1/4 inches long. Both rules have the same design with reinforced end pieces. Check the attached video on how to work your vintage man tool: slide rule operation instructions!