Caracalla, AE27 of Mesembria, Thrace. AD 198-217.

AY K M AYR ANTWNINO, laureate, draped and cuirassed bust right.
MECAMBRIANWN, Dionysos, loins draped, seated left on throne, holding 
thyrsos and overturning kantharos on his knee.

Varbanov 4158 corr. ("Zeus"); Moushmov 3993 corr. (ditto)
Very rare. 
Ex Dr. George Spradling Collection.

With permission of cngcoins.com, auction 344, lot 262, Feb 2015.

Note: Moushmov's example was in very poor condition and the 
reverse type was incorrectly described as Zeus, holding a 
patera and sceptre. On this example, the filleted thyrsus 
and overturned kantharos on his knee are clearly visible.