Caracalla, AE17 of Nikopolis ad Istrum.

M AV K ANTWNINOC or similar, laureate, draped, cuirassed bust right.
NIKOPOLITWN, serpent-entwined staff of Asklepios.

Varbanov 2975. 
Rare, not in Moushmov.

Contributed by George Clegg (biggyg2), April, 2012