Although described as regular dies trial pieces, this was more likely deliberately struck for sale to collectors as part of complete copper sets. T. Harrison Garrett had one and a double set was apparently stolen from the Iowa State Historical Museum. About a half dozen are known. Photo courtesy of Superior, this is the Garrett coin. These were also struck in Brass J593/P657 with supposedly only 5 struck including the piece illustrated below. We believe that there may be a couple more than that in actuality. Photo courtesy of American Numismatic Rarities.