Faber Castell 2x Duplex 2/82N and 62/82N slide rule in case 1970 Germany

Combination of 2 Duplex slide rules in the “N” execution with manual. The manual covers both the normal size 2/82 and the pocket 62/82 version and has a sheet to explain the difference with the 2/82N and 62/82N scales. In the 1970’s these were amongst the best slide rules by Faber Castell. Both slide rules come in their original signed box (box is in great condition) and signed  good condition sleeve. The rules and cursors are in ver good condition with small signs of normal use. There is just a little bit of yellowing which is often seen on the “N” versions. The larger rule measures ca. 33 cm or 13 1/4 inches long and the pocket version measures 19 cm or 7 3/4 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!