This vintage Soviet slide ruler from 1975 is a rare find for collectors of engineering and science-related memorabilia.

The logarithmic ruler was made in Leningrad and comes in its original case, adding authenticity and uniqueness.

The ruler is a valuable addition to any collection and is a great conversation starter for those interested in the history of engineering and technology. This collectible item is perfect for those who appreciate vintage Soviet-era items and the ingenuity of slide rulers. 

The ruler is in good working order and well-preserved, making it a great investment for anyone looking to enhance their collection.