Dear customers and visitors of our listing. We present to your attention Original Logarithmic mini ruler Soviet Slide Calculator with case and instructions for storing the ruler. The instructions cost a stamp of approval and a price of 1 ruble 16 kopecks. Made in the USSR in Kyiv in the 1971 . Material: plastic and wood. . A great option both for a personal collection and as a gift. You have a unique historical artefact- a USSR logarithmic ruler, which may be of interest to collectors and lovers of rare objects. The logarithmic ruler was widely used in scientific and technical calculations in the USSR and became a symbol of that time. Photos are real. General condition is good vintage. For a better assessment see the photos, consider your choice before buying, write for more information, I will be glad to answer. Thank you for visiting our listing. Have a nice shopping.