AE tessera, Central Italy, ca. 2nd Century BC. 3.98g, 18.9mm-

The two infants Heracles and Iphicles, attacked by the serpents sent by Hera

IC O S anticlockwise from centre left, Hercules standing 
right, striking Hydra with club.

Lindgren III 1646 (this coin)

Forum Ancient Coins, art. 24952.