Watch List notes:

SELEUKID EMPIRE. Seleukos I Nikator. 312-281 BC. AR Tetradrachm (27mm, 17.01 g, 8h). Seleukeia on the Tigris II mint. Struck circa 296/5-281 BC. Laureate head of Zeus right / Athena, brandishing spear, shield on left arm, in quadriga of elephants right; above, Δ above and B below anchor. SC 130.1a; HGC 9, 18a. Lightly toned, struck from worn dies. Fine.

From the John L. Cowan Collection, purchased from Pegasi, 18 September 2008.