Constans AE Follis. 

Obv: CONSTAN-S MAX AVG, laureate & rosette-diademed, draped & cuirassed bust 
 right 
Rev: GLOR-IA EXERC-ITVS, two soldiers holding spears and shields with one 
 standard between them, O on banner. 
Mintmark: A (or D?) SIS star. 

RIC VIII Siscia 77, rated common. 346-348 AD

Contributed by Dane for George Clegg (biggyg2), August, 2008.