A nice Mauser, but I'm in doubt about the Safety catch release, it's looks that it not fit in the frame, see last picture.
I never seen a Mauser marked: Mauser-Werke A.G. Obendorf A.N with that kind of safety catch, normal they are flat and the buton in the middle.
This Safety catch release is mostly to see at het Mauser pistol marked: Mauser-Werke A.G. Obendorf A.N *** Patent.
Burgess Mason can tell you more about, as he's an expert of this kind of guns.
Look at this picture.