Constantine I as Caesar AE Follis. 

CONSTANTINVS NOB CAES, laureate head right.
CONSERVATORES VRB SVAE, Roma seated facing, head left, in 
hexastyle temple, right hand holding globe and sceptre; knobs as 
acoteria; plain pediment. 

Mintmark R star Q. 

RIC VI Rome 196; Sear 15512.

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