1877 Shield Nickel. Proof-66 (PCGS).，Gorgeous Gem surfaces are dusted in iridescent silver-gray through which a modestly reflective finish shines as the coin rotates under a light. The rarest date in the Shield nickel series, the 1877 is a Proof-only affair with an estimated mintage of 1,250 to 1,500 pieces. This is one of the finest known to PCGS, and it would make a fitting addition to any advanced collection.，，
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