Logarithmic Ruler Round Lineup Calculator Slide Rule Rare USSR 1969 the ruler is fully functional very good condition Be sure to get a tracking-number. That is real actual pictures.The item "Logarithmic Ruler USSR Round Lineup Calculator Slide Rule Rare 1966" is in sale since Wednesday, October 13, 2021. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Engineering\Slide Rules". The seller is "renata_riga" and is located in Rga. This item can be shipped worldwide.