Severus II as Caesar AE follis. Aquileia, 305 AD. 

Obv: SEVERVS NOB CAES, laureate, helmeted, cuirassed 
bust left, holding spear over shoulder and shield.

Rev: VIRTVS AVGG ET CAESS NN, Severus II on horseback 
galloping right, spear raised, spearing kneeling foe
before horse, another foe prostrate on ground beneath
horse. 

Mintmark AQP

RIC VI Aquileia 68a, rated scarce. 

Submitted by incitatus coins, Feb. 2010