This vintage logarithmic ruler KL-1 is a must-have for collectors and enthusiasts of Soviet engineering. Made in the USSR in 1966, this circular slide rule is a true gem for anyone interested in the history of science and technology. With its intricate design and precision calculations, the KL-1 is a valuable addition to any collection of slide rules and calculators.

Featuring a unique logarithmic spiral construction, this slide rule is perfect for solving complex equations and displaying your work. Its compact size and lightweight construction make it easy to carry around, while the intricate details and markings add a touch of elegance to your desk. Don't miss out on this opportunity to own a piece of history with the vintage logarithmic ruler KL-1.