RUSSIA. Ruble, 1856-CNB OB. St. Petersburg Mint. Alexander II. PCGS PROOF-63 Gold Shield. KM-C-168.1; Bit-46; Dav-283. Struck during the year of Alexander IIs coronation, and the first full year of his reign, this delightful proof striking exhibits pinpoint sharpness as one might expect, with watery reflectivity in the fields. Unique in its appearance, both sides are blanketed in rich tone that includes instances of green, red, orange and amber iridescence. As a proof, <strong>RARE</strong> in this or any quality.