Hi guys collected this gun today from an old guy who was given it by a friend who came out of the army, he moved house and it has been in the loft since 1953, I know plenty about shotguns but little about rifles, the barrels have bohler stahl which I believe is German re type of steel other markings are kmg n51 stamped on underside of the barrels are 19 on its own 5.6 339 with 77 underneath plus a faint proof mark most of action and mounts are engraved double triggered thanks in advance for any info on age value etc,