Daniel Boone Gun Company: Trade name on shotguns made for Belknap Hardware Company of Louisville, Ky. Most likely manufacturer would be Crescent Firearms, but it may also be from J. Stevens, Iver Johnson, various Belgian companies, or others. Most likely period of manufacture would be the 1930's or 1940's, but could be earlier or later. Value, if it is a side-hammer with damascus barrels, would depend on how well it looks over a fireplace, maybe $125-$150. If it is has fluid steel barrels and is fully functional, it should bring $250 or more in most areas.