Although described as regular dies trial pieces in the literature, these were actually deliberately struck for sale to collectors as part of complete off-metal sets. Examples were struck as follows: Copper J1087/P1223 with about a half dozen known. Aluminum J1088/P1224 with fewer than 3 confirmed. Nickel J1089/P1225 with the illustrated example, from Superior's 9/02 sale, believed to be unique and formerly in the Dunham and Farouk sales. Photo courtesy of Superior.