Gordian III, AE42 medallion of Acmoneia, Phrygia. AD 238-244.

AYT K M ANTW GORDIANOC, radiate, cuirassed bust right, with aegis, holding spear.
AKMONEWN, Rhea, holding the infant Zeus standing front, looking left, surrounded by three Korybantes, holding swords and shields, the central shield over Rhea's head.

Paris 115a; Babelon 4 in RN 1891; Yale ILE2013.17.395; RPC VII.1, 679.

Image copied from Lenormant, "Monnaies et médailles".