BRUNSVIGA Antique calculator model 13 RK enamelled in red.

Fantastic and exclusive antique mechanical calculator with serial no. 34-100332, made in Germany in the 1950’s. With a winding system invented by W.T. Odher, it performs the 4 arithmetic operations (addition, subtraction, multiplication and division). In 1959 Brunsviga merged with the Olympia Werke typewriter brand.

This is a solidly built machine with all the usual Brunsviga refinements, such as a control register, a revolution counter with tens and a backwards transfer. The switch at the front right of the machine selects the compensation mode. In its upper position, the upper lever on the right clears both the rev counter and the input register, and the middle lever on the right clears everything. In its lower position, the upper lever clears only the rev counter, and the centre lever clears the rev counter and the result register (accumulator). All registers can be cleared individually with the switch in the lower position. Works perfectly. Notice: Decorative product. No guarantee of operation.