Mysia, Pergamon. Early-mid 2nd century B.C. AE 20 (20.4 mm, 12.19 g, 12 h). Laureate head of Asklepios right / ΑΣΚΛΗΠΙΟΥ ΣΩΤΗΡΟΣ, serpent coiled around omphalos; c/m: owl standing right, head facing, within circular incuse. SNG France 1815 (with countermark). aVF. Rare countermark.

Another of this type, with the same countermark, sold by CNG for $360 USD. See CNG EA 201, 17.12.2008, lot 74.