Watch List notes:

IONIA, Uncertain. Circa 600-550 BC. EL Forty-eighth Stater (5.5mm, 0.29 g). Lydo-Milesian standard. Uncertain type (degraded die?) / Quadripartite incuse. Unpublished in the standard references. Fine.

Although the obverse suggests an early, typeless issue, the reverse punch suggests a much later issue, during the figural period, thus the obverse here was probably struck with a very worn die.