Constantine II AE3 of Cyzicus. AD 324-325.

Obv: CONSTANTINVS IVN NOB C, laureate, draped, cuirassed bust left 
Rev: PROVIDEN-TIAE CAESS, campgate, 2 turrets, 8 layers, star above, no doors. 
Mintmark: SMKA. 

RIC VII Cyzicus 26, rated R1