What are the numbers on the underside of the barrel on my Finnish Mosin?
A. There should be a corresponding set of numbers on the front of the recoil lug of the receiver. These numbers were used for tracking during assembly, but are not related to serial number on the top of the barrel. Here is a picture of a set of assembly numbers. The Soviet Union used similar numbers on later production, although the numbers on the barrel and receiver will not necessarily match.
