Hi M,
Can I take it that with your avatar name Malnava, that you're Latvian or you're in Latvia or near? And that you have dug up them locally?
To me they don't look German, espectially the valve with the operating handle, also the writing on the alternator/generator looks Cyrillic to me. The cable pulley arms are painted black, which is also unlikely to be Luftwaffe.
So if your location is Latvia etc etc, I would think this is a Russian aircraft(?), no doubt someone will tell you!
Nice find, and still lots more left in the ground where you are. Good luck.
Cheers
Shessi