These guys are right: this is a Merkel 200E. Neat little gun.

I bet HAGEN was an importer; like Arms De Chasse was in the 1980's--during the commie times.

Anyone want to guess at the year?

My wild guess is 1960--I'm shootin' from the hip--It'll be interesting to learn.

Too bad somebody had to work on this fine little gun, likely not knowing what a treasure they had.
Doesn't look like's it been shot much. But I wish the guy who used it had taken an little better care of this princess.

Enjoy,

BB