I've tested some functions
I can confidently say that it works very well
look carefully for cosmetic defects
there is corrosion
prophylaxis may be needed
but works without complaints
certainly not as smooth as the new ones
consider the shelf life
description from AI
DescriptionUp for auction is the iconic "Felix" arithmometer, the most famous mechanical calculator produced in the USSR. Manufactured between the 1930s and 1970s, this heavy-duty pinwheel calculator is based on the legendary Odhner design. It is a fantastic centerpiece for collectors of vintage technology, computing history, or Soviet memorabilia.Key FeaturesType: Mechanical pinwheel calculator (Odhner type)Functions: Performs addition, subtraction, multiplication, and divisionMaterial: Rugged, all-metal body with a classic industrial finishOperation: 100% mechanical—no batteries or electricity required