Watch List notes:

BITHYNIA, Kalchedon. Circa 260-220 BC. AR Tetradrachm (28mm, 16.86 g, 1h). 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. EF, lightly toned, slight die shift on reverse. Rare.

Ex Alex Shubs Collection (Classical Numismatic Group 94, 18 September 2013), lot 406.