Crispus AD 316-326 AE3 

Obv: CRISPVS NOB CAES, laureate draped and cuirassed bust
right, seen from behind. 
Rev: PRINCIPIA I-V-VENTVTIS, Mars, naked except for helmet
and boots, chlamys flying out behind, advancing right
holding transverse spear and shield. 

R-S across fields
QARL in ex. 

RIC VII Arles 129, rated R2.

Contributed by "Serezhka2000", Jan. 2011