Distance across the barrel breech face is 2.165 inches
Distance between the firing pins is 1.090 inches (using snap caps in both barrels and measuring)
Distance between the barrel hook and barrel breech face is 2.267 inches
SN is 249772, so 1914 manufacture. On the barrel flats besides the serial number is a 1 on one side and a faint 4 on the other side.
Since I don't have any other 16s or 20s in my collection for comparison, no clue if that would work or not on a 16 frame.
Just figured others on this forum may have considered this before and tried it and might know that there is a good chance that a 16 ga receiver would work or not.
