Russia
Nicholas I Rouble 1849 CПБ-ПА AU55 NGC, St. Petersburg mint, KM-C168.1, Bitkin-224. At first glance this selection appears to have even, gunmetal toning; however, upon rotation, the obverse surfaces ignite with electric blue and champagne iridescence. Visually outstanding and with mild wear that accounts for the grade.
Estimate: 300-500 USD