Constantius II, AE3, Sirmium.

DN CONSTAN-TIVS PF AVG, pearl diademed, draped, cuirassed bust right, A behind bust.
CONCORDIA-MILITVM, emperor, diademed and in military dress
standing facing, head left, holding standard with chi-rho 
banner in each hand, star above, III in left field. 

Mintmark: star SIRM

RIC VIII Sirmium 21.

Contributed by George Clegg (biggyg2), August, 2011