Watch List notes:

KINGS of MACEDON. Philip III Arrhidaios. 323-317 BC. AR Tetradrachm (27.5mm, 17.24 g, 4h). In the types of Alexander III. Uncertain mint in the east. Head of Herakles right, wearing lion skin / BAΣIΛEΩΣ [ΦIΛ]IΠΠOY, Zeus Aëtophoros seated left; ΠY throne. Unpublished. Oval flan, little off center, scratches in field on reverse. Good VF. High relief. Apparently unique.

The style of this issue, its high relief portrait, and the presence of the royal title are consistent with issues struck during the first satrapy of Seleukos I.