Constantine II. AE Follis. 326-328 AD. 

Obv: CONSTANTINVS IVN NOB C, laureate, draped, cuirassed bust 
left
Rev: PROVIDEN-TIAE CAESS, campgate, 2 turrets, 6 layers, star 
above, no doors. SMTS Epsilon in ex. 

RIC VII Thessalonica 157, rated R5. (An extremely rare officina for this series)

With permission of Roma Numismatics, June 2009