Horse and rider,monogrammed "MO-CKBA" ("Moscow") below / Cyrillic inscriptions in 5 lines: "TSAR I VELIKIY KNYAZ MICHAIL FYODOROVICH VSEYA RUSI" ("Tsar and Grand Duke Michail Fyodorovich of All Russia"). 13mmx8mm, 0.46 grams. Moscow mint, issued 1638. Grishin #590.
Michael I of Russia (Russian: Михаи́л ФёдоÑович Рома́нов, Mikhail Fyodorovich Romanov) (12 July 1596 12 July 1645) was the first Russian Tsar of the house of Romanov. He was the son of Feodor Nikitich Romanov (later known as Patriarch Filaret) and Xenia (later known as "the great nun" Martha). His reign marked the end of the Time of Troubles.