Uploaded November 2019 | Updated September 2026, 42 minutes ago
The Mercedes-Euklid model 29 is a mechanical calculator made in (East) Germany from 1934 until about 1953. The first Mercedes Euklid models were made in around 1910, using a mechanism invented by Christel Hamann. In 1934 all their models were replaced by completely redesigned new series of models. Of these, model 29 was the only manually driven one. All the others were electric, and had more features such as automatic multiplication or an extra storage register.
I have made a separate video to show the proportional levers mechanism:
youtube.com/watch?v=nsUWe9KkR8A
Christel Hamann also invented the Hamann Manus shown in this video:
youtube.com/watch?v=dApNR6drlY4
For more information on this calculator and others in my collection, visit my site:
jaapsch.net/mechcalc
0:00 Introduction, History
2:28 Addition
4:10 Clearing register
4:27 Subtraction
5:40 Multiplication
7:01 Division
10:51 More history
11:47 Outro
The Mercedes-Euklid model 29 is a mechanical calculator made in (East) Germany from 1934 until about 1953. The first Mercedes Euklid models were made in around 1910, using a mechanism invented by Christel Hamann. In 1934 all their models were replaced by completely redesigned new series of models. Of these, model 29 was the only manually driven one. All the others were electric, and had more features such as automatic multiplication or an extra storage register.
I have made a separate video to show the proportional levers mechanism:
youtube.com/watch?v=nsUWe9KkR8A
Christel Hamann also invented the Hamann Manus shown in this video:
youtube.com/watch?v=dApNR6drlY4
For more information on this calculator and others in my collection, visit my site:
jaapsch.net/mechcalc
0:00 Introduction, History
2:28 Addition
4:10 Clearing register
4:27 Subtraction
5:40 Multiplication
7:01 Division
10:51 More history
11:47 Outro
