V776356 is etched on the bottom of the receiver of an early A grade Fox. This is a long shot, but does anyone recognize the etching as a drivers license number? Vermont,maybe. Doesn't look like a SS#. A dog tag number? Geo. commented awhile back that he thought it gave the gun character. Yea, Some character on a bender chicken scratching on his gun. I wish this violation was on one of Geo.'s guns and not on mine.
No clue as to the origin of the number, but I totally agree with your comment.
Instead of attempting to find out who the fool was who did the damage, maybe consider whether the damage is worth repairing with laser welding, perhaps followed by color case hardening if a substantial amount of case colors remain.