Crispus AE follis of Arles. AD 318.

CRISPVS NOB CAES, laureate draped and cuirassed bust right.
PRINCIPIA IVVENTVTIS, Mars standing left in military dress, 
chlamys over left shoulder, resting left hand on shield on ground, and holding inverted, vertical spear in right.

P in right field. 
Mintmark Q star-in-crescent A.

RIC VII 172
Rated R4

Contributed by Richard Demarco of Carpe Diem Numismatics, April 2018.