David, IMO, this is gun was refinished very skillfully. Some of the differences with the original, only the trigger guard was nitre blued, not the forend iron(indeed the forend iron is one of the "protected" areas that one looks at in determining % of remaining CC). The barrels have been re-blued, looking at the flats one sees pits that were never addressed/left alone during the re-blue. Finally the oval 2 3/4 inches does not look, to me to be "factory". I'm certain someone more knowledgeable can address other items. It is a very nice gun and I'd sure be happy to put it in my gun room. Best, Dr. BILL