30 inches at 40 yards, as per 4 hangtags.
http://parkerguns.org/forums/attachm...4&d=1477448771
The serial numbers are from a period running at least 22 years.
From 1904 through 1926. Approximately 100,000 were produced in that date range alone.
Wishing I could know the chamber length of # 125594 and # 216599 because the tags say to use 2 3/4 inch long shells. I would expect at least the earlier (if not both) of the two (2) to measure in the chambers at 2 1/2 inch or 2 5/8 inch (instead of 2 6/8ths).
Note, in the event someone more experienced at this can deduce something by knowing this too:
125594 is D2 H 0 S 12 30
216599 is V H 0 S 12 34