Williams and Powell, South Castle Street , Liverpool 1834-1909, Business sold to William Richards in 1905.
The "not for ball"proof marks indicate the gun was made between 1875 & 1887. The barrel marked 13 would be cylinder bored and should have a bore diameter measuring .710-.719 inches in diameter.Sounds like a Wildfowling gun because of weight and chamber length.


Roy Hebbes