Constantine I AE3. 335-337 AD. 

Obv: CONSTANTI-NVS MAX AVG, rosette-diademed, draped & 
cuirassed bust right
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears & shields
 on either side of one standard with chi-rho on banner. 
SCONST in ex. 

RIC VII Arles 394, rated R5

Contributed by Dane for Pete Clegg (biffabacon10), June 2009