Neapolis, Macedonia, AR hemidrachm. 1.84 g. 4th century BC. 

Gorgoneion facing with tongue protruding.
N-E-P-O around head of nymph right, wearing necklace. 

SNG Cop 227; SNG ANS 433; SNG Berry 41.

With permission of numislanz.de, Auktion 102, lot 156