Like humbarger said, bolt shroud numbers are fake, they've even been restamped upside down. Barrel is 37 dated which explains the Nazi firing proof and appears to have come from a Mauser Borsigwalde K98k with the E/280 and 2 x E/211 stamps on it. As for the bolt body, it appears to have been made by C.G. Haenel for JP Sauer and appears correct (script S & WaA114) though it should have a Weimar firing proof on the bottom of the bolt root which I don't see. Given that your bolt shroud and firing pin are mismatched, if the safety and cocking piece are matching to the firing pin (provided they aren't renumbered), it would look like your whole striker assembly was replaced at some point. The front band just looks like the first 7 was struck too hard at the top of the stamp, at least to me.