Russia
Nicholas I Proof 25 Kopecks 1850 CПБ-ПА PR64 Cameo NGC, St. Petersburg mint, KM-C166.1, Bit-301. An outstanding near-Gem representative of this elusive Proof issue, lightly toned along the peripheries with frosty devices and mirrored fields exhibiting a handful of mild handling marks.
HID02901242017
Estimate: 1200-1800 USD