Horse and rider,"MO" monogram (for "Moscow") below / Cyrillic inscriptions in 5 lines: "TSAR I VELIKIY KNYAZ MICHAIL FYODOROVICH VSEYA RUSI" ("Tsar and Grand Duke Michail Fyodorovich of All Russia"). 12mmx9.5mm, 0.43 grams. Moscow mint, issued 1624-1626. Grishin #486.