SELEUKID EMPIRE. Antiochos I Soter. 281-261 BC. AR Tetradrachm (29mm, 16.90 g, 12h). Seleukeia on the Tigris mint. Diademed head right / Apollo, testing arrow and resting hand on bow, seated left on omphalos; monograms to outer left and right. SC 379.6c; HGC 9, 128g. VF, lightly toned.