Constantine as Caesar. AE follis, Aquileia mint. AD 306-307. 

Obv: CONSTANTINVS NOB CAES, laureate head right. 
Rev: VIRTVS AVGG ET CAESS NN, Mars, naked, helmeted, walking 
right, holding transverse spear in right hand and trophy over 
shoulder in left. 

Mintmark AQ Gamma. 

RIC VI Aquileia 92b; Sear 15555. 
Rare. 

With permission of TimeLine Auctions (www.timelineauctions.com), October, 2014