Caracalla, AE17 of Trajanopolis, Thrace. 

Obv: AVT K M AVR CE ANTWNEINOC, laureate, draped, cuirassed bust right.
Rev: TRAIANOPOLEITWN, Altar.

Schönert-Geiss 104; Moushmov 5026.
 
Contributed by Ars-Aeterna / David Suter, Switzerland, Sep. 2010