Watch List notes:

BITHYNIA, Kalchedon. Circa 260-220 BC. AR Tetradrachm (25mm, 16.99 g, 11h). In the name and types of Alexander III of Macedon. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; monograms in left field and below throne. Price 918; Türkoğlu –; HGC 7, 520 (same dies as illustration); BN inv. 1967.91 (same obv. die). In NGC encapsulation 4682289-045, graded Ch VF, Strike: 5/5, Surface: 4/5. Rare.

Ex Colin E. Pitchfork Collection (Classical Numismatic Group Electronic Auction 423, 27 June 2018), lot 158, purchased from Classical Numismatic Group, 20 January 2003.