Horseman advancing right, holding a spear, "IB" below the horse / Inscription in 4 lines "TSAR I VELIKI KNYAZ IVAN VSEYA RUSY" ("Tsar and Grand Duke Ivan of all Russia"). 12mmx10.5mm, 0.67 grams. Pskov mint. Griszin #95; Russian Wire Coins #95.
This is a full kopeck (not a denga) The coin was minted in Pskov after 1547.