Yeah, I was very patient....checked every week, but nobody answered...
No just kidding, thanks for the replies!
I changed the eyepieces, but the results remain the same.
Looks like the rangefinder is differently made. I think, they would have told me at Solms, if something would be wrong.

I spoke to the man, who CLA'd this camera, but he did not mention the rangefinder.
Here are a few more pics for you. Without the eyepiece. Maybe somebody has a camera with serial close to mine and could have a look, if it is the same?
The bad:
The good:
This is the situation from the other side. (With eyepiece on)
the bad:
the good:
Maybe somebody knows more about that? Is it just a rangefinder change, or is really something wrong?
and....sorry for the bad pics.
Thank you!