Watch List notes:

ARGOLIS. Epidauros. Achaian League, Late 2nd-early 1st centuries BC. Hemidrachm (Silver, 15 mm, 2.38 g, 11 h). Laureate head of Zeus to right. Rev. Monogram of AX; to left and right, Σ - Ω; above, snake coiled to right; below, ΣI. BCD Peloponnesos 1267. Clerk 159. Very rare. Attractively toned. Obverse slightly flat struck, otherwise, nearly extremely fine.
From the Maleatas Collection, acquired from Spink's in London in May 1991.