Crispus AE follis. 316-317 AD. Aquileia.

CRISPVS NOB CAES, laureate, cuirassed bust right.
PRINCIPIA IVVENTVTIS, Crispus in military dress, standing 
left with vertical spear, resting right hand on a shield at 
his side. 

Mintmark AQT. 

RIC VII Aquileia 10.

Sold for $10.50 on ebay, May 2008.