I find it interesting that the rear sight is a post-war type, but the receiver is a 1936. I'd expect it to be the type 3 (I think that's correct) sight, the original version put on the 91/30. Very similar to the one on it, it has a long groove extending from the notch to just before the graduations begin.
Do you see a box with a slash mark through it on the butt of the rifle? It's usually found on the right side. This is the reasrsenal mark showing it was arsenal refurbished and stored against future need. (Future need was usually seen as arming an occupation force should the USSR have invaded a major player(s) had the Cold War gone hot.)
P.S. Very nice rifle, Sir! J.S.