Crispus AE follis. 316-317 AD. 

CRISPVS NOB CAES, laureate, draped & 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 9.

With permission of Auktionshaus H. D. Rauch GmbH, Sept. 2008.