Brunsviga 13RM

 Home > Browse Our Collection > Calculators > Mechanical Calculators > Brunsviga 13RM

The German company Grimme, Natalis and Co. of Braunschweig obtained the German patent rights to the Odhner pinwheel calculator in 1982, and produced similar machines under the Brunsviga name. The company improved and developed the Brunsviga which became one of the most successful mechanical calculators and was produced up to the early 1970s.

The company merged with Olympia in 1959 but the Brunsviga name continued to be used. Hand-held electronic calculators under the Brunsviga name are known, maybe badged for whoever owned the Brunsviga name at the time.

BRUNSVIGA-13RM Pinwheel Calculator

TECHNICAL DATA  of the Mechanical Calculator  BRUNSVIGA-13RM

Dimensions:   (ca.)  Width   =  11 3/4" /  30 cm
                     Depth   =   8    " /  20 cm
                     Height  =   4 3/4" /  12 cm

Weight:       (ca.)  14 lbs  /  6.5 kg

Mechanics:    Pin-Wheel / Sprossenrad
                     10s Carry Mechanism

Functions:      Add, Subtract, Multiply, Divide
                     Back-Transfer / Rueckuebertragung

Registers:       Input       =  10 Decimals
                     Counter     =   8 Decimals
                     Arithmetic  =  13 Decimals
                     O L Y M P I A - Werke AG
                     - BRUNSVIGA-Werke -
                     West Germany
                     (Made in Spain)
Our calculator is in excellent condition and has a serial number of 27733
This was very kindly donated by Amanda Freestone from her father's collection.

Details from

Operating Instructions for 13RM can be found at

How a Pinwheel calculator works:

Manufacturer: Olympia
Date: 1968

This exhibit has a reference ID of CH5397. Please quote this reference ID in any communication with the Centre for Computing History.


Brunsviga 13RM

Click on the Image(s) For Detail

Help support the museum by buying from the museum shop

View all items

Founding Sponsors
redgate Google ARM Real VNC Microsoft Research
Heritage Lottery Funded
Heritage Lottery Fund
Accredited Museum