Gordian III and Tranquillina (238-244). Mesopotamia, Singara. Æ (32mm, 22.25g, 12h). Confronted busts of Gordian r., laureate, draped and cuirassed, and Tranquillina l., draped and wearing stephane. R/ Tyche seated l. on rocks, holding branch; above, centaur (Sagittarius) leaping l., shooting bow; to lower l., half-length figure of river-god Mygdonius swimming l. SNG Copenhagen 256; BMC 8-11. Green patina, VF