Mr. Curt Herzstark was a mechanic who worked on a totally new math-machine in Austria before WW2. As the Nazis occupied Austria, they put him in the KZ Buchenwald and gave him the equipment to perfect his machine.
They told him if he would be succesfull they would let him live and Arianize him. This machine should be a special gift for Adolf Hitler after the final victory.
He survived the war and the KZ.
After the war, he went to Luxemburg and offered the duke his invention. The duke, a hobby mathematician was very impressed and built specially for this machine a great factory.
The machine is able to addition, subtraction, multiplication and division.
The name of the machine is Curta.
Here is a picture of it. I have no idea how it works. It looks very unusual.
It was very expensive for this time. In 1950 it costs ca. 500 DM. For the relation a gem costs in this time 0,03 DM.
Source1:
http://einestages.spiegel.de/external/ShowTopicAlbumBackground/a3327/l7/l0/F.html#featuredEntrySource2:
http://www.curta.de/kr31/index.htm