history-computer.com
The Swedish mechanic and inventor Willgodt Theophil Odhner was born in Westby, parish of Dalby in northern Wärmland province of Sweden, on 10 August 1845.
The Odhner Arithmometer was one of the famous inventions by Willgodt Odhner. Its production officially began in 1890 in Odhner’s Saint Petersburg workshop.
He planned to manufacture a small and simple calculator that was portable and easy to use.
In 1881, after three years of work, Odhner received a great gold medal for his innovations. In addition, Odhner was also highly esteemed in the hierarchy of the Expedition.