Russia, Emperor Nicholas I. Large Silver Rouble Coin.Denomination: Silver RoubleMint Place: St. Petersburg (SPB)Reference: Davenport 283, KM-168.1. Material: Silver (.868)Weight: 20.35gmDiameter: 36mmObverse: Crown above value in cyrilic letters and date inside wreath.Legend (translated): COIN ROUBLE / 1851 / S.P.B:Reverse: Large crown above crowned double headed eagle, holding imperial scept ...