Check the listing for details. Vintage Mechanical Calculator - Cleaned And Repaired Crank Arithmometer. Condition: Used. Listed at 454.04 USD. Get your hands on a piece of computing and accounting history with this exceptional UNIC arithmometer! Manufactured by the German company Unic (the inscription "Imported from Germany" is visible), this mechanical calculating machine is a magnificent specimen of the calculating cylinders of the mid-20th century. This model, characterized by its robust black metal design and its cranks, is a true witness to the pre-electronic era. • Fully Overhauled: The machine has been professionally serviced and is fully functional. • Excellent Aesthetic Condition: The original black paint is in very good condition, with the “Unic” inscription clearly visible. The dials (input drums), the mobile cart and the counters (result and revolutions/counter) are clear and readable. • Capacity: It has 9 digits for.