Although these are described as regular die trial pieces in the standard references, it is more likely that the off-metal 'trials' of this year were deliberately struck for sale to collectors in complete sets. Examples were also struck as follows: To view all available images, click here. Copper J1365/P1510 with only 2 confirmed: 1) NERCA 7/79 ANA, Bass-B/M 5/99, Simpson-Heritage 9/20 - PCGS65BN 2) Bolt-Stacks 4/66, described as "gilt, extremely fine, some gilt worn off" Aluminum J1366/P1511 with only 2 confirmed: 1) Holabird-Kagin circa 2014 auction, Simpson-Heritage 1/24 FUN - PCGS66, illustrated above, click on the thumbnail image to enlarge 2) Mocatta-NERCA 7/79 ANA, Bass, HWBRF-Heritage 5/23 - PCGS66 Photo courtesy of PCGS.