Acarnanian League AE23, 3rd century BC, very rare

Acarnania, Acarnian League. AE23 (7.70 g), 3rd century BC.
Obv. Laureate head of Zeus right; behind, eagle standing right, head to left; below, API.
Rev. Head of the River god Acheloüs right; behind, monogram; above, trident.
BCD 32; BMC 15; Imhoof-Blumer, Akarnanien 16,3.

Very rare. Wonferful dark green patina and almost extremely fine.