Gallienus, AE27 of Serdica, Thrace. 

AVT K GALLIHNOC, , laureate, cuirassed bust right, seen from the back.
OVLPIAC CERDIKHC, Demeter standing left, holding torch and
and corn-ears, serpent emerging from cista mystica at feet 
left.

Varbanov 2617.

Courtesy of Ed Flinn of www258.pair.com