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 What does the JM in an oval mean on the barrel of a 39M made in 1978?
K Klondike Mike · Registered Joined Feb 12, 2011 · 102 Posts #2 • Feb 27, 2011 Factory proof mark. It John Marlin's initials. Mike
