Here's what I've been able to learn about my mosin, any corrections or contributions to information about it, would be great!
1937 Izhevsk Arsenal born - upper barrel tang markings changed following year
Sitting in an early, pre-war stock, notable by the escutcheons and brass end caps on the upper hand guard.
serials are all matching, sans bayonet.
practically every component is stamped with the izhevsk triangle and arrow.
Likely Arsenal Refurbished in the 70's, shellac is mostly present and shinny, stock has some repairs, including a repair just behind the nose cap and above the front barrel band spring, that i saw exactly on another rifle just a few days ago, here on this forum. there is also a repair centered just under the bolt handle in the closed position, could this stock have housed a bent bolt (Sniper PU Action, that never had the scope mounted?) at some point? there is no repair to the left side of the stock, where wood would have been removed to mount the scope. there is also black touch up paint to the bluing, on the barrel and magazine plate, the paint on the barrel was concealing some pitting and rust, which i cleaned with a brass brush and hoppes9, i felt it was minor and would be just fine to shoot, would you all agree its not a problem?
also I would like to note that the bore is absolutely beautiful, shiny and clean without any pitting, but i have not been able to get a decent picture of it :( my camera phone is not the best for this! now I know another piece of equipment I need haha.
anyway, thank you in advance to you knowledgeable folks, Confident I will enjoy this forum.
A lot of the rifles have small pits and it is usualy ok to shoot them. 
Not sure what you are talking about the upper barrel tang changing though.
