Watch List notes:

IONIA, Uncertain. Circa 600-550 BC. EL Forty-eighth Stater (5.5mm, 0.31 g). Lydo-Milesian or Phokaic standard. Head with archaic features left / Incuse square. Unpublished in the standard references. Near VF.

The head on this issue is vaguely reminiscent of the left-facing heads on the archaic silver of Kolophon.