A 219 in 22 LR?
I've heard of them in 22 smooth bore from the old Utica days but have never even laid eyes on one. I know of one collector who owns two of them and thats it, period.
You've got one rare gun there.
The symbols are simply inspectors marks and assembly marks, Utica guns can't be dated to a year, all we know is that they were made before 1945.
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