Crispus, as Caesar, 317-326. Follis (bronze, 3.21 g, 20 mm), Aquileia. CRISPVS NOB CAES Laureate, draped and cuirassed bust of Crispus to right. Rev. PRINCIPIA IVVENTVTIS Mars standing front, head to left, holding spear in his left hand and placing his right on shield set on ground, AQ[? in exergue. RIC 9. Nearly very fine.