Kings of Parthia, Vologases IV (AD 147-191). BI Tetradrachm (26mm, 13.26g, 12h). Seleukeia on the Tigris, year 490 (November AD 178). 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 84.62. VF