Originally Posted By: Researcher
Methinks the 10 stamped on the web between the forearm loop and the barrel flats is a clue. In looking through the pictures of other Colt Model 1878s on the internet I saw 12 stamped in that location.



I found 3 10 Ga that sold at auction all had the 10 stamped on the water table
I found 2 12 Ga both had 12 stamped