I am looking for information on a 12ga shotgun made by C.G. Bonehill of 110 Cannon street London. The gun is marked" The Bonehill Challenge" on both lock plates and the butt plate. It has a nicely figured wood, hammers, heavy damascus barrels, right barrel choked tighter than the left and action is nicely engraved.

The seller of the gun thought the Bonehill Challenge was some sort of competition and this was a prize gun.

Any information would be appreciated.