Faustina II AE of Kyzikos, Mysia. 10.03 g. 

FAVSTEINA CEBACTH, draped bust right.
KYZIKH NEOKO, Demeter in biga of serpents right, holding two torches. 

RPC online 1620; BMC 225 var (biga animals)

Courtesy of Helios Auction 5, June 2011