Parthian Kingdom. Mithradates I. Silver Tetradrachm (15.64 g), 164-132 BC Seleukeia on the Tigris, SE 174 (139/8 BC). Diademed and bearded bust of Mithradates I right. Reverse: Herakles standing left, holding cup, lion's skin and club; date (ΔΟΡ) in exergue. Sellwood 13.10; Shore 39. An excellent Hellenistic portrait. NGC grade Ch AU; Strike: 4/5, Surface: 4/5.