RARE USSR Circular Slide Rule KL-2 Vintage Soviet Working Original BOX. RARE USSR Circular Slide Rule KL-2 Vintage Soviet Working Original BOX" is in sale since Thursday, February 4, 2021. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules".store" and is located in Zaporizhia, Zaporizhia. This item can be shipped worldwide.