"In 1892 Odhner sold his patent rights to Grimme, Natalis & Co. A.G. of Braunschweig for sale in Germany and some neighboring countries. This company manufactured the Odhner-type calculators under the name Brunsviga, and later, the company itself was named Brunsviga. 20,000 units were sold between 1892 and 1912."

James Redin, "A Brief History of Mechanical Calculators - Part II - Crossing the 19th Century."

Photo Source: Eusebio Huélamo.

X-Number World of Calculators