Underwood Barrel Marking

[Patrick Chadwick]

My match-winning carbine is a Standard Products mixmaster, No 2200xxx. Also with Underwood barrel, dated 1x - 44 (I really cannot make out the second figure).

But about 1.5" further back towards the breech end there is another marking: letters I and A, serif characters, about 5/32 high, with the I centered on the A to create a symmetrical monogram above a date 7-61.
Attachment 38384
Attachment 38385


Does this indicate some kind of arsenal makeover, bore refresh or what? It is not an importer's mark or Germany" target="_blank">German proof mark, with which I am familiar.

Any ideas?

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.