I picked this up on a trade at $550 I figure wholesale on import refits is over $400 so I was safe. 1928 Hex receiver. It is 100% numbers matching. The scope base is electro penciled with the rifle serial number. I think it is an aoriginal sniper and original mount (arsenal stamps to left of serial number) The scope may be repro though. I just don't know. Although, the bluing is not even on the scope which seems original, but the sight post is extremely dark and the scope looks like new.
Please take a look at the photos and let me know if you can confirm any of my speculation.