Oiniadai, Akarnania, AR14 pentobol, 420-400 BC. 1.89 g. 

Head of the river-god Acheloös right.
KALL-IR-OA around F within incuse square.

BMC 2; Imhoof 4; Traité II-4, 11. 

Very rare.

With permission of Münzen & Medaillen Deutschland GmbH, Auction 23, lot 6, Oct 2007.