Caracalla, AE30 of Serdica, Thrace.

AVT K M AVP CEVH ANTWNINOC, laureate head right. 
CERDIKHC in ex., Herakles, naked, bearded, reclining left 
on the back of a lion walking right, holding small winged 
Nike or Eros and club.

Varbanov 2357 (this coin); Ruzicka 275; BMC 16.