This Engineer Logarithmic Mathematical Circular Slide Rule KL-1 Calculator from the USSR is a rare find for collectors and enthusiasts. Manufactured in Ukraine, this slide rule was designed for engineers and scientists in the field of mathematics, engineering, and science. The slide rule features a circular design and is made from high-quality materials for long-lasting durability. The KL-1 Calculator is a modified item that has been well-preserved since it was manufactured in 1930-Now. It comes from the collectibles category and falls under the Science & Medicine (1930-Now) and Engineering categories. The product is in good working order and has been maintained to ensure that it functions as it should.
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