Although these are described as regular die trial pieces in the standard references, it is more likely they were deliberately struck for sale to collectors as part of complete off-metal sets. Examples were struck as follows: To view all available images, click here. Copper J1379/P1524 with the following 2 confirmed: 1) Flynn in 1971, Bass-B/M 5/99, Rau-Heritage 4/18 as NGC64BN, Heritage 3/19 - NGC64RB, cleaned 2) Simpson-Heritage 11/20 - PCGS63BN, cleaned, illustrated above, click on the thumbnail image to enlarge One of these is ex RARCOA 2/72 and the other ex RARCOA 1/73. Aluminum J1380/P1525 with 2 known as follows: 1) Col Green, Farouk, Kreisberg-Schulman 2/60 lot 2483, Kreisberg 9/60, Kreisberg 9/61, Federal Brand 10/61, Federal Brand 1/62, Federal Brand 1/63, Kriesberg 6/63, Federal Brand 1/66, Paramount Auction 83, RARCOA-Akers 8/91 - PCGS65 2) Farouk, Kreisberg-Schulman 2/60 lot 2484, unknown intermediates, GreatCollections.com 1/20/2014 as NGC unc detail, damaged, GreatCollections.com 3/30/2014 - PCGS Unc details, stain removed Photo courtesy of PCGS.