Faber Castell Novo Duplex 2/83N slide rule full set 1970 Germany

Large well know slide rule that was made in Germany by A.W. Faber & Castell and is called the Castell Novo Duplex 2/83N. This one comes with box, sheet and manual (Dutch). Both slide rule and slider are in good condition, but there is light yellowing between the lines on both side (more on the back than on the front) as shown in the pictures. The box is complete and in working condition, (small crack on one corner). It measures ca. 38 cm or 15 inches long. This great rule is reinforced with metal pieces on the ends and ribs on the ends of the slider. Check the attached video on how to work your vintage man tool: slide rule operation instructions!