Crispus (Caesar, 316-326) AE Follis (Bronze, 3.20g, 19mm) Alexandria, 326.
Obv: FL IVL CRISPVS NOB CAES, laureate, draped and cuirassed bust of Crispus to left
Rev: PROVIDEN-TIAE CAESS, campgate with no doors and two turrets, above, star, SMALA below.
Ref: RIC VII, 35