Watch List notes:

THRACE, Mesambria. Circa 175-150 BC. AR Tetradrachm (33mm, 16.77 g, 1h). In the name and types of Alexander III of Macedon. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left on ornate throne with thunderbolt on rear leg; in left field, crested Corinthian helmet right above MA; KO below throne. Karayotov I 160–5 var. (O49/R– [unlisted rev. die]); Price 1077; HGC 3, 1568. Near EF, lightly toned, off center on reverse.

From the Colin E. Pitchfork Collection, purchased from Jonathan Kern, December 1997.