Crispus Caesar, AE 3, Siscia AD 320

IVL CRISPVS NOB CAES, laureate cuirassed bust left, holding spear and shield.
VIRTVS EXERCIT, standard with VOT-X with two captives
sitting at its base.
S-F across fields. 
Mintmark BSIS star. 

RIC VII 113.

With permission of cngcoins.com, March 2012