Watch List notes:

BITHYNIA, Kalchedon. Circa 260-220 BC. AR Tetradrachm (28mm, 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; monogram in left field, grain ear in exergue. Price 941 (Kallatis); HGC 7, 521. VF, toned, some light scratches. Rare.