Russia
Nicholas I Proof 20 Kopecks 1850 CПБ-ПA PR65 NGC, St. Petersburg mint, KM-C165, Brekke-338. Obv. Crowned double-headed eagle. Rev. Crowned date and value in wreath. Superb strike, with deeply mirrored fields and frosted devices. Both sides exhibit light russet and gold toning, with surfaces free of significant flaws. Very rare in this Gem Proof condition with nice cameo contrast.
HID02901242017
Estimate: 2000-2500 USD