Crispus, AE (19mm, 2.63g) . Arles, AD 318. CRISPVS NOB CAES, laureate, draped and cuirassed bust right. / PRINCIPI A IVVENTVTIS, Mars in military dress, chlamys across left shoulder, leaning on shield and holding spear; P(crescent and *)A in exergue. RIC 162.