Watch List notes:

Greek
MYSIA. Parion. (Circa 4th century BC).
AR Hemidrachm (13.8mm 1.83g)
Obv: Facing gorgoneion with open mouth and tongue protruding within shallow circular incuse.
Rev: Bull standing to left, head reverted; ΠA-PI above and below, torch as exergual line
SNG BN 1383.