Although these are described as regular die trial pieces in the standard references, the off-metal 'trials' of this year were deliberately struck for sale to collectors. They were struck in the following combinations on both thick and thin planchets. To see images of all of these, click here. Copper J1020/P1155 with about a half dozen known including the illustrated example courtesy of American Numismatic Rarities. The Simpson example is slightly impaired. Aluminum J1021/P1156 with the following 2 confirmed. 1) B/R Rare Coin Reviews #21-6 (1974-6) in set, Fairfield-B/R 10/77, Stack 9/87, Queller-Heritage 1/09 FUN as NGC67, Simpson-Heritage 1/24 FUN, Heritage 6/24 - PCGS67 2) Champa-AAA (Bowers & Ruddy) 5/72, Superior 10/90 as PCGS65, Denali, Legend, Heritage 4/13 - PCGS66 Nickel J1022/P1157 with only 4 confirmed. These were struck from both proof, AW849, (date high with the 1 in date to the right of the point of the shield, per Ron Guth) and business strike dies, AW850, (date lower and more to the left with the 1 below the point of the shield) Jacob Lipson of Heritage notes that the business strike dies were Osborn-Cushing OC-6. It is one of the few die trials known to exist in both formats. In business strike format, the following 3 are known: 1) Stacks 8/71 ANA, RARCOA 1/73, Heritage 7/94 ANA lot 7938, Denali - PCGS66 2) Dibello-Stacks 5/70, Crouch-Superior 6/77, Hughes 2/78, Superior 5/90, Simpson-Heritage 9/20, Heritage 11/21 - PCGS62 3) RARCOA 4/72, Auction 86, Queller-Heritage 1/09 FUN as NGC66, Simpson-Heritage 1/24 FUN - PCGS67 One of these business strikes is ex Stickney, V. Brand (journal #39032), A. Brand (sold 5/41). There appear to be at least 1 known in proof format as follows: 1) Heifetz-Superior 10/89 as PCGS65, Auction 90, Heritage 7/94 ANA lot 7939 - NGC66, Denali, Heritage 8/11, Heritage 4/15, Heritage 5/23 - PCGS66 If there are only 4 of these then King Farouk owned all of them.