I have ww2 British bikes (only one left now) hence my knowledge of this forum.
My partners brother died suddenly and we found a German motorcycle in his garage, which may well be ww2 ( it's an r35). He's got a gaz67b in another lockup, if anyone is interested.
I just found this numberplate, in one of his many parts boxes. It's rusty, but I have little clue on German stuff.