Caracalla, AE46 medallion of Nikaia, Kilbiani.

AY KAI M AYP ANTWNEINOC, laureate, draped bust right.
Rev: NEIKAEWN KILBIANWN, emperor, radiate, standing
facing in facing quadriga, head left, holding globe and raising right hand. 

BMC 16.
Very rare.

Courtesy of Nilus Coins on vcoins.com.