I have a Smith Corona Rifle, barrel date 7-43, with a dark blued bolt. The only markings on the bolt are a pin prick and the number 2 on the underside of the bolt handle. There is no visible "X" stamped on the top of the bolt handle. The safety lug is scalloped in front. The bolt sleeve is unmarked and has scalloped top surfaces and is dark blue too. Is this bolt correct for this rifle?