Watch List notes:

IONIA, Uncertain. Circa 650-600 BC. EL Myshemihekte – Twenty-fourth Stater (6mm, 0.52 g). Lydo-Milesian standard. Plain globular surface / Incuse square. Weidauer –; Traité I –; SNG Kayhan –; SNG von Aulock –; Elektron I 10–1. As made.

It is possible that this is actually a later issue with a heavily worn obverse die, obscuring the type.