Russia
Grand Duke Oleg Medal 912 Treaty With Greeks UNC Details (Rim Damage) NGC, Diakov-1705 (incorrect on NGC holder). Struck in white metal. The Grand Duke is portrayed in armor facing right on the obverse. Reverse has three Greek men seated at a table to conclude their second treaty. Engravers are Yudin & Gass, diameter is 79 mm. From the Historical Medal series produced during the reign of Catherine II in the 18th century.
Estimate: 300-500 USD