Russia
Nicholas I Proof Rouble 1851 CПБ-ПA PR63 NGC, St. Petersburg mint, KM-C168.1, Bitkin-228. Obv. Crowned double-headed eagle in corded circle. Rev. Crowned date and value in wreath. Fully mirrored fields, with golden patina and a flawless strike. Very scarce in Proof.
HID02901242017
Estimate: 6000-7000 USD