Watch List notes:

MESOPOTAMIA, Singara. Gordian III, with Tranquillina. AD 238-244. Æ (31.5mm, 25.10 g, 4h). Laureate, draped, and cuirassed bust of Gordian right vis-à-vis draped bust of Tranquillina left, wearing stephane / Tyche seated left on rocks, holding branch; above, centaur (Sagittarius) leaping left, discharging bow; river god swimming left below. SNG Copenhagen 256; BMC 8-11. VF, dark green to black patina, minor roughness and some light smoothing.

From the Richard Baker Collection.