Roman Imperial
Crispus, Caesar (316-326 AD). Nicomedia.
AE Follis (18.85mm 2.78g)
Obv: FL IVL CRISPVS NOB C. Laureate, draped and cuirassed bust left.
Rev: PROVIDENTIAE CAESS / MNB. Camp gate, with two turrets and open doorway; star above.
RIC 122.