Antoninus Pius, AE42 medallion of the Ionian League. AD 138-161. 39.72 g. Magistrate Marcus Claudius Fronto

AYT KAI TI AI ADRIANOC ANTWNEINOC, laureate, draped, and cuirassed bust left.
ACIARX KAI ARXI G I POLEWN PRO N KL FROYTW, AIONEO KOI.. below, Herakles sitting left on rock covered with lionskin, 
club resting at his side, trying to tear the robe of Auge, 
standing right, her hand on his shoulder, pushing him away, 
whilst trying to escape to left.

Voegtli 18d; Gillespie 14-15. 

Most likely used to mount the medallion as an appliqué. 
Rare.

With permission of cngcoins.com, May 2014
Estimate: $200.