Watch List notes:

SELEUKID EMPIRE. Antiochos I Soter. 281-261 BC. AR Tetradrachm (26mm, 16.83 g, 3h). 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 379.1; HGC 9, 128g. VF, lightly toned.

Unusual in that the bust design carries off the edge purely by happenstance, as the flan spur is below.