What does the JM in an oval mean on the barrel of a 39M made in 1978?
B bluedodgeman · Registered Joined Oct 15, 2010 · 140 Posts Discussion Starter · #1 · Feb 27, 2011 Only show this user What does the JM in an oval mean on the barrel of a 39M made in 1978?
Klondike Mike · Registered Joined Feb 12, 2011 · 106 Posts #2 · Feb 27, 2011 Only show this user Factory proof mark. It John Marlin's initials. Mike