Watch List notes:

ISLANDS off IONIA, Chios. Circa 270-220 BC. AR Tetradrachm (29mm, 16.83 g, 12h). In the name and types of Alexander III of Macedon. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; in left field, sphinx seated right above monogram; Σ below throne. Bauslaugh, Posthumous, Series 19, obv. die 28; Price 2346; HGC 6, 1132. Lightly toned, a few small flan flaws on obverse. VF. Very rare, five noted by Bauslaugh (including the one in Pella), two in CoinArchives.