The Curta Calculator, 1:1 size, with turnable crank and clearing rings! This is not a functional calculator- the body is solid plastic and does not move. But it is the same size and shape as a real Curta (Type 1) and the crank turns. Impress your friends from a distance of at least 10 feet! It has KNURLS!

Basic design is copied from Marcus Wu's excellent 3:1 sized functional 3D-printable Curta.

Easy assembly from 3 printed parts- no gluing, screwing, or anything else required.