Although these are described as regular die trial pieces in the standard references, these were deliberately struck for sale to collectors as part of complete off-metal sets. Examples were struck as follows: To see all available images, click here. Copper J739/P820 with only 3 or 4 known as follows: 1) B/M 9/84, Heritage 2/85, Heritage 5/85 mail bid sale, Heritage 8/85 ANA, Superior 1/86 - proof 64rb 2) RARCOA 1/73 ?, Goldberg 5/03, Stacks 10/03, Stacks 6/04, ANR 12/04, Superior 2/05, B/M 7/05, Heritage 8/07 ANA, Stacks 7/08, StacksBowers 8/11 ANA, StacksBowers 11/11, StacksBowers 3/12, StacksBowers 6/12, Heritage 9/19 - PCGS64RB 3) Rau-Heritage 4/18 - PCGS63BN 4) B/M 6/88 - proof 60bn, possibly one of above Aluminum J740/P821 with the following 4 believed to be different. 1) Superior 1/90 as PCGS65, Heritage 1/08 FUN as PCGS65, Simpson-Heritage 11/20 - PCGS66 2) NERCA 7/79 ANA in set ?, B/R 3/80, NERCA 1/81 FUN, B/M 9/84, Superior Auction 85, Superior 2/87, MARCA 8/87 - PCGS65 3) Kagins 8/77 ANA in set, Stacks 11/06, Heritage 1/07 FUN - PCGS65 4) Sieck-B/R 7/81 ANA, Heritage 1/03 FUN as PCGS64, Simpson-Heritage 8/10 ANA - NGC64 with laminations in right obverse, illustrated above courtesy of Heritage. Click on the thumbnail image to enlarge Nickel J741/P822 with only the Woodin, Newcomer, Lohr, B/M 8/09 ANA, Simpson-Heritage 1/21 FUN - PCGS64, illustrated below courtesy of PCGS.