KINGS of PARTHIA. Mithradates II. 121-91 BC. AR Tetradrachm (32mm, 15.61 g, 12h). Seleukeia on the Tigris mint. Struck circa 120/19-109 BC. Diademed and draped bust left / Archer (Arsakes I) seated right on omphalos, holding bow; ΔI behind throne, TV in exergue. Sellwood 24.4 var. (no letters behind throne, palm to outer right). VF, minor porosity.