Crispus AE Follis, 2.93 grams, 19.40 mm. Siscia. 320-321 AD.  

Obverse: IVL CRIS-PVS NOB C, laureate head right.  
Reverse: CAESARVM NOSTRORVM, around VOT V within wreath

mintmark Gamma SIS star.  

RIC VII Siscia 161; cf Sear 3917.

Courtesy of TimeLine Originals (www.time-lines.co.uk), Apr. 2010