So far the chambers are 2 1/2", It is Black powder proof for finished and soldered barrels with a pressure of 14223 psi (pressure adjusted 1923) using smokeless T, It is choked with a range guarantee, seems to have won a prize at the World's Fair in 1914. barrels are compressed steel and something to do with an ingot mold. that is about as far as I can get.

So many guns, so little time!