Constantine II. 330-335 AD. Arles. 

CONSTANTINVS IVN NOB C, laureate, cuirassed bust right
GLOR-IA EXERC-ITVS, two soldiers holding spears and 
shields with two narrow standards between them. 

Star above standards. 

Mintmark SCONST. 

RIC VII Arles 346. Very Rare (R4).

Courtesy of Roma Numismatics, Feb, 2010