KINGS OF PARTHIA. Mithradates I, 165-132 BC. Drachm (Silver, 16.5 mm, 3.80 g, 12 h), Seleukeia on the Tigris,, dated ΓOP (173) = 140-139. Diademed bust of Mithradates I to right. Rev. ΒΑΣΙΛΕΩΣ ΜΕΓΑΛΟΥ ΑΡΣΑΚΟΥ Zeus seated left, holding eagle and scepter; to outer left, monogram; in exergue, ΓΟΡ. Sellwood 13.8; Shore 38. Slightly rough surfaces, smoothing and tooling on the obverse, otherwise, good very fine.