Watch List notes:

CARIA, Mylasa. Circa 300 BC. AR Drachm (16.5mm, 4.18 g, 2h). In the name and types of Alexander III. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; monogram in left field, KH below throne. Price 2480; Thompson, Alexandrine, Group 1, 5. Lightly toned, porosity, scattered marks. VF.

See F. Delrieux, "Le role militaire des monnaies au monogramme ΩX dans la Carie de Pleistarchos" in RN 155 [2000], who suggests that this issue was possibly struck under Pleistarchos, brother of Kassander, who may have ruled in Caria circa 300 BC.