no idea mate, nobody knows !!Looks like refurbed 1929 Tula ex-Dragoon. Not sure as for the JR mark on bolt, is it the guy who modified the handle?
ah ! , i see, thanks very much, so this bolt was done in the U.S ?The JR marking is used by our own Jim "Boltman" Roberts to identify the replica sniper or custom bolts he produces.