Walther EMKD
Oh no. An electric machine. By default, I do not dare plug it in for fear of electrocution, and it isn't in the best of conditions either. If anyone wants it, it can be really cheap. If not, I'll have to restore it once I run out of other projects, but that could still take a while!
Plug and electrical specs:
Model and Serial Number
Made by ...
...and sold by R.O. Strassle in Stuttgart
Finally, a beautiful worm drive gear to get the power of the motor to the pinwheel cylinder.