Caracalla AE27 of Anchialus, Thrace.

AY K M AYR ANTWNINOC, laureate, draped, cuirassed bust right.
OYLPIANWN AGXIALEWN, galley left with oarsmen and pilot, 
emperor standing left, facing the oarsmen and holding patera
and sceptre.

Varbanov 352 (this coin); AMNG 538.

ebay sale, 2004.