Caracalla, AE29 of Serdica, Thrace. 

Obv. AVT K M AVRH CEV ANTWNEINOC, laureate head right. 
Rev. OVLPIAC CEPDI-KHC, river-god reclinig left, right 
hand on his knee (holding branch?)and resting left arm
on inverted urn from which water flows. 
Varbanov 2433; Ruzicka 280; Vienna 8246; Moushmov 4890.

With permission of Asta Tintinna Numismatica and deamoneta.com, Feb, 2013