Russia
Nicholas I 25 Kopecks 1828 CПБ-HГ AU58 NGC, St. Petersburg mint, Bitkin-126 (R), KM-C159. Obv. Crowned double-headed Imperial eagle, with wings down, and date below. Rev. Crowned value and mintmark in wreath. Lustrous and sharply struck, with a few minor contact marks. A very rare issue, and the finest of only two examples certified by NGC, with none certified by PCGS.
Estimate: 1000-1200 USD