Belgian and likely after 1910 but pre-WWI
The barrels look to be fluid steel, but do not carry Smokeless Proof which was then optional and not atypical for tradename doubles intended for the U.S. market
It appears to have monobloc barrels so possibly by H. Pieper
The L bore is 16.4 mm = .646" and muzzle constriction 15.6 mm = .614" so choked 20g full at .032"
The chambers are almost surely 2 1/2"
|