Watch List notes:

BITHYNIA, Kalchedon. Circa 260-220 BC. Fourrée Stater (20mm, 6.47 g, 2h). In the name and types of Alexander III of Macedon. Helmeted head of Athena right / Nike standing left, holding wreath and stylis; KA monogram in left field, HP monogram below left wing. For official issue, cf. Price 910 (Kallatis); cf. HGC 7, 503. EF, plating cracking on reverse.