Thank you all for your kind comments.
It really is what you would call a "schwerer Brocken" (hefty lump) in German...
The appear only once in a while a German Ebay, the hallmark "EPD" is often misread as "DEP" by the sellers, as the D encircles the two other letters...
This one shows some modifications, the lamp post has been transferred to a place close to the generator, the lineshaft (a rather big one, painted the sam reddish brown as the base of the cylinder) is missing.
But most unusual is the crown of the chimney, definitely not original but a re-used silver item (perhaps a vintage salt shaker?):
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