Constantine II. AE Follis. 329-330 AD.

CONSTANTINVS IVN NOB C, laureate, cuirassed bust left
PROVIDEN-TIAE CAESS, campgate, 2 turrets, 7 layers, 
star above, no doors

Mintmark SMKB (unlisted officina)

RIC VII Cyzicus 63 var (officina), rated R4

Contributed by George Clegg (biggyg2), November, 2009

RIC lists only officinae gamma, epsilon and S.