Caracalla, AE22 of Bura, Achaia, AD 198-217. 4.62 g. 

Unclear legend, laureate, cuirassed bust right 
BOYRAEWN, Dionysos, naked, standing left, holding kantharos 
and thyrsos.

BCD 465, otherwise unpublished.
Very rare.

With permission of LHS Numismatik AG BCD sale, auction 96, Lot 465, May 2006.