Billon Tetradrachm [22,38 mm; 9,94 gm]. Dated SE 510 (196/7 AD). Seleukeia on the Tigris mint. Diademed and draped bust to left, wearing tiara / Vologases seated to left on throne, Tyche standing to right before him, presenting diadem and holding sceptre; year in upper central field. Sellwood 87.2 - 87.9. gVF.