Crispus, AE follis, Siscia. 320 AD. 

IVL CRISPVS NOB CAES, laureate, cuirassed bust left, holding 
spear and shield.
VIRTVS EXERCIT, standard inscribed VOT X between two 
seated captives. S-F over HL across fields. 

Mintmark delta SIS star. 

RIC VII Siscia 123.

Contributed by Alfredo DeLaFay of Imperial Coins, June 2007.