Russia - Rouble 1851, Silver, NICHOLAS I 1825–1855 St. Petersburg mint. Crowned double-headed eagle with coat-of-arms. Rev. value over date within wreath, crown above.Bitkin 222 (R1); Sev. 3583 (R); Uzd. 1686; Dav. 283. KM. 168.120.59 g Nearly extremely fine