Obv: the regular-issue eagle die of the date. Rev: the regular-issue eagle die of the date. The obverse and reverse of this lustrous pale silver-gray specimen feature reflective fields and lightly frosted motifs. Numerous patches of hairlines engage both sides, and corrosion is seen at the top of Liberty's head and at the bottom of the reverse design. The uspatterns.com website notes: "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: Copper, Judd-1379/P-1524, with only two or three known; Aluminum Judd-1380/P-1525 with only two or three known, one of which shows corrosion on both sides." A rare prize in any grade -- the only other example of this rarity certified by NGC is called Proof-65.