Caracalla, AE17 of Nikopolis ad Istrum.

AV K M ANTWNINOC, laureate, draped, cuirassed bust right.
NIKOPOLITWN PROC [ICTR], Artemis advancing right, holding
bow, reaching for arrow from quiver on her back; hound
at feet.

Varbanov 3008; AMNG 1590.

With permission of Roland Müller. Added June 2013.
Note: Although the bust does resemble Elagabalus a 
bit, I believe this to be Caracalla, because this
reverse type for Elag. always has a magistrate's name.