Produced at the Caliber factory in Moscow in the early 60s. In excellent condition, apparently never used. This lot has 2 features. 1 The presence of the original cardboard box and instructions in perfect condition.Yellow parts - metal later releases had a plastic ring and a plastic center part. The space theme in the production of consumer goods in the USSR in the 60s is an extensive topic for collectors. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules". The seller is "viktor2366" and is located in this country: UA. This item can be shipped worldwide.