Caracalla AE30 of Serdica, Thrace. 

AVT K M AVP CEV ANTWNEINOC, laureate, draped, cuirassed bust 
right, seen from behind.
OVLPIAC CERDIKHC, Apollo as Bonus Eventus, naked, wearing 
headband, standing front, head left, holding patera in right 
hand, and branch in lowered left; low lit altar to left.

Ruzicka 185; Athens 1040; Sofia 1921 and 5699; Varbanov 2155-2156 var (obv. legend). 
 
With permission of Asta Tintinna Numismatica and deamoneta.com, Feb, 2013