Watch List notes:

SELEUKID EMPIRE. Seleukos I Nikator. As satrap, 321-315 BC. AR Tetradrachm (27mm, 17.02 g, 5h). In the name of Philip III of Macedon, types of Alexander III. Babylon (II) mint. Struck circa 318/7-315 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; monogram in left field, Z below throne. SC CAd43.8; Duyrat Group V, Series 4, 896–8 (Arados); Price P142 corr. (monogram); HGC 9, 11 var. (unlisted issue). Good VF. Well centered. Very rare, three noted by Duyrat (including the one in Pella), one additional in CoinArchives.