Watch List notes:

Mysia, Lampsakos AR Obol. Circa 500-450 BC. Janiform female heads / Head of Athena to left, wearing Corinthian helmet; serpent(?) coiled to right behind; all within incuse square. Baldwin, Lampsakos, Group A, II, pl. V, 24-27 var. (no S on rev.); SNG BnF 1127-8 var. (same); CNG E-454, lot 135. 0.94g, 12mm, 12h.

Good Very Fine. Very Rare with this symbol on the reverse.

From the inventory of a German dealer.