Parabola: Also my thanks to you for finding this interesting interview.

Eight years ago I bought a W. Jeffery 12 bore hammer gun, and after some research found that it was their "Farmer's Gun", with heavier 13 bore barrels, 2.5" chambers and zero engraving. Mine still has the original 30" barrels and it weighs in at 7 lbs 1 oz. Chokes are 1/8th and 3/4 , so it quite useable for game. The stock on mine was also an inch too short, so have added a longer butt plate in black.
I have fired 400 one ounce loads through it and it works fine. Many observers have never seen a hammer gun before; the more intelligent ones ask where the safety catch is...

HB