BITHYNIA, Kalchedon. Circa 260-220 BC. AR Tetradrachm (28mm, 16.71 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 928 (Kallatis); HGC 7, 521. Near EF, toned, a few marks, some porosity.
From the Colin E. Pitchfork Collection.