Watch List notes:

WESTERN ASIA MINOR, Uncertain mint. 4th century BC. AR Hemiobol (6.5mm, 0.25 g, 7h). Head of Pan right / Kylix. CNG 90, lot 649; CNG 78, lot 306; CNG 69, lot 229; Münzen und Medaillen AG FPL 472, no. 95; Hauck & Aufhäuser 17, lot 44. VF, toned, light porosity. Fine style. Very rare, unpublished in the standard references.

This type has been attributed to various locations in past catalogs, but none are particularly convincing.