Constantine I AE Follis. 

Obv: CONST-ANTINVS AVG, helmeted cuirassed bust right 
Rev: VIRTVS-EXERCIT, Standard inscribed VOT XX in two lines, between two 
 captives, both looking right, one with hands bound behind his back; S-F 
 across fields
Mintmark: AQP. 

RIC VII Aquileia 48, rated C1

Contributed by Dane for George Clegg (biggyg2), October 2007