Aitolian League, AE18, 205-150 BC. 4.62 g. 

Helmeted head of Athena right.
AITW-LWN, Herakles, naked, standing left, looking right, 
lionskin over left arm, resting right hand on club.

F in upper left field.

BMC 70-71.

Image from the BMC catalog.