Constantius II AD, AE follis, Cyzicus.

FL IVL CONSTANTIVS NOB C, laureate, draped, cuirassed bust left.
PROVIDEN-TIAE CAESS, campgate, six layers, two turrets, star above. 

Mintmark SMK delta.

RIC VII Cyzicus 27

With permission of Roma Numismatics, April, 2011