hopkins allen

[Thatmichhunter]

I picked up a HA 12g single shot last year and was wondering where I could find info on the year in was made, or if anyone here could tell me. Serial # is k1202. Its in pretty good shape, non damascus. Also wondering about what the chamber size is, there's no marking on it but my non scientific method of sticking a tape in till I hit the lip came up with 2 5/8. Would that mean its a 2 1/4 gun? Thanks in advance, Clayton.