Watch List notes:

IONIA, Erythrai. Circa 550-500 BC. EL Hekte – Sixth Stater (10mm, 2.56 g). Head of Herakles left, wearing lion skin; the lion skin has three rays emanating from its forehead / Quadripartite incuse square. Cf. SNG Kayhan 737–8 var. (without rays); cf. SNG von Aulock 1942 var. (same); SNG Copenhagen –; cf. Boston MFA 1806–7 var. (same). VF, struck slightly off center.

An interesting variety of this type with the lion skin having three rays emanating from its forehead, much like the earlier electrum coinage issued by the Lydian kings (see CNG eAuction 324, lot 139 for an example).