Horseman advancing right, holding a spear, letters "ΠC" below / Inscription in 5 lines "TSAR I / VELIKIY/KNYAZ IB/AN VSEYA/RUSY" ("Tsar and Grand Duke Ivan of all Russia"). 14mmx12mm, 0.67 grams. Pskov mint (listed in Novgorod in some references). Grishin #77 (as Novgorod mint); Russian Wire Coins #77.
This is a full kopeck (not a denga). The coin was minted in Pskov or Novgorod in or slightly after 1547.