Russia
Nicholas I Proof Rouble 1831 CПБ-HГ PR64 NGC, St. Petersburg mint, KM-C131, Bitkin-110, S-2983. Crowned double-headed eagle with wings down, date and value in legend. Rev. Crowned four-line inscription in wreath. Mottled blue, russet, and gold toning over mirrored fields. The strike is very sharp and the devices frosted with minor handling marks. Extremely rare in Proof, with only 4 pieces certified by NGC and PCGS combined.
HID02901242017
Estimate: 20000-25000 USD