Kings of Parthia, Vologases IV (AD 147-191). BI Tetradrachm (26mm, 13.34g, 12h). Seleukeia on the Tigris, year 499 (July AD 187). Diademed and draped bust l., wearing tiara; B behind. R/ Vologases seated l. on throne, Tyche standing r. before him, presenting a diadem and holding sceptre. Sellwood 84.118. VF