Loga 30Tt Scholar 2 360 circular duplex slide rule in case 1970 Switzerland

This high quality metal double sided circular slide rule was produced by Loga from Switzerland. This model Tt Scholar 2 comes with the original cardboard case that has kept it in very good condition so there are only small signs of use or age. It is a later, ca. 1970s’ edition of this elaborate and high quality circular slide rule. It is fully functioning with an interesting cursor shape. The diameter of the slide rule is 12,5 cm or 5 inches. There is a small pen mark on the dial next to the logo and some writing on the inside case only. Check the attached video on how to work your vintage man tool: slide rule operation instructions!