My paradox is stamped costo, though I think that was an importer or distributor. It dates to the 30's, The right barrel is fully rifled, the left is an open choke 12 bore. 2 1/2inch chambers. The two shot group was fired at 40 yards, the five shot group was at 25 yards. I have taken bushy tails with it but nothing bigger yet. I plan to hunt hogs, deer and other game with it. Here is a slide show: