Belongs to a friend of mine. It is a VERY heavy piece, probably 50-60 lbs. Octagon rifled barrel with G R Douglas on the top rear under the long plate. Under hammer ignition. 60" overall length. 43.5" barrel. Hooded front sight. Guessing the plate screwed into the top rear of the barrel is some kind of scope mount? It also is stamped .50 Caliber on the top rear of the barrel. Any information will be greatly appreciated. Also trying to get some idea of the value as it is going to be for sale . I have tried everything I know to upload several photos, but have not been successful. I can email or send photos to a cell phone number if that would help.