Caracalla, AE26 of Creteia, Bithynia. 198-217 AD.

Obv: AYT K M AYRH ANTWNINOC, laureate head right
Rev: KRHTIEWN beneath Demeter, standing left, holding 
torch, in biga of winged serpents. 

RecGen 25; SNG von Aulock 7009; FRANKE KZR 307

found in orphaned folder, ancientcoinart, August 2010.