1866 Pattern Shield Nickel. Judd-507, Pollock-591. Rarity-5. Nickel. Plain Edge. PCGS Proof-66 Cameo . (CAC)

A rare and visually striking Reconstruction-era pattern, this 1866 Pattern Shield Nickel (Judd-507, Pollock-591) is a Choice Gem Proof certified PCGS Proof-66 Cameo. Struck in nickel with a plain edge, it exhibits the bold frosted devices and deeply mirrored fields collectors prize, delivering the hallmark cameo contrast sought after in top-tier pattern proofs. Issued as an experimental strike while the U.S. Mint finalized designs for the new five-cent series in 1866, this Judd-507 embodies the birth of America’s nickel coinage and the Union Shield motif by James B. Longacre. Rated Rarity-5 in the pattern reference works, it is estimated that only a few dozen to perhaps 75 examples are known in all grades—far fewer at the lofty Proof-66 Cameo level. Highlights: 1866 Pattern Shield Nickel, Judd-507; Pollock-591; Rarity-5 Nickel composition with plain edge PCGS Proof-66 Cameo: exceptional mirrors with frosty, high-contrast devices Historically significant first-year pattern tied to the debut of the Shield nickel Scarce and desirable entry in the U.S. pattern series, ideal for advanced sets and type specialists Collector appeal: Serious numismatists will value the rarity rating, reference pedigree, and superb eye appeal at a true Gem Cameo level. Casual buyers and history enthusiasts will appreciate its direct connection to post–Civil War America and the launch of U.S. nickel coinage. A museum-worthy combination of design history, condition, and scarcity that elevates any pattern, nickel, or 19th-century proof collection. This is a standout opportunity to acquire a premier-quality 1866 Shield nickel pattern—an enduring artifact of the Mint’s innovation and a trophy piece for both connoisseurs and emerging collectors.