Gordian III and Tranquillina (238-244). Mesopotamia, Singara. Æ (21,8 g, 31,5 mm, ) Confronted busts of Gordian on l., laureate, draped and cuirassed, and Tranquillina on r., draped and wearing stephane. R/ Tyche seated l. on rock, holding branch; the centaur river god swimming l. below.