Kings of Parthia, Vologases IV (AD 147-191). BI Tetradrachm (25mm, 13.45g, 12h). Seleukeia on the Tigris, year 491 (July AD 179). 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 84.78. About VF