Watch List notes:

Thrace, Apollonia Pontika. Late 4th Century B.C. AR diobol (14.5 mm, 2.83 g, 11 h). Facing gorgoneion; spiral ornament below / Inverted anchor; crawfish to left, A to right. Topalov 45; BMC 5; Traite 1626. VF. 

Overstruck, traces of undertype on the obverse.