I just bought a new 1914 DWM, and upon examination, came across a marking I can't place. In addition to the serial number, bore diameter, and barrel index mark, there is a 30.30 stamp on the barrel. I do not think this has to do with Winchesters or deer hunting (figured I'd better pre-empt that joke), but I'm clueless as to what it is. It is exibiting sufficient "halo-ing" that it seems period, but I can't figure it. I thought it might be some form of British proof, but there are no other non-standard stamps on the pistol to reinforce that. Any info?
