Circa 170 – 160 BC. AR triobol, 2.52 gr., 11.1 mm.
Obv: ead of Aitolia to the right, wearing kausia.
Rev: AITΩΛΩN; Calydonian boar to the right; behind: monograms ΣΩ-monogram, below: ΠO-monogram and spearhead to the right.
Ref: BCD Aitolia 492 var. (different placement of monograms).
A rare variant of an already very rare issue. Very fine.