I will add some additional information. There are no Nazi acceptance stamps. The rifle has a guide rib on the bolt - the one that turns to the top when you open the bolt. All rifles that I have examined made after the war do not have the guide rib. It then re-appears with the modifications made in 1949 to add the double square bridges. The gas ports in the bottom of the bolt are oval - these went to round after the war and back oval in '49.

I still need someone to tell me what the proof numbering means..............

John