Thales Patent Rechenmachinen

This one in the video is the THALES PATENT RECHENMASHINE, a German mechanical adding machine with pinwheel gears manufactured by Thaleswerk Rechenmaschinen Spezialfabrik, it’s a calculator made in Germany.

This model has been built around 1950 to 1960, it’s an earlier version of the KA model, you can see it because there is a wheel instead of a lever on the left.

It has 9 rows of numbers on its front from 0 to 9, and 8 column.

KA stand for Klein-Addiermashine, it means small adding machine.

It’s completely mechanical, and it’s quite heavy, around 2.6 kg. It’s not electric, so zero emissions.

There are 9 digits, so you can make calculation up to hundreds of millions.

You can make additions and subtractions, and it’s quite easy to use.

If you want more information you can take a look at the video.