Constantius II. AE3. Sirmium.

Obv: DN CONSTAN-TIVS PF AVG, pearl diademed, draped, 
cuirassed bust right, A behind head
Rev: 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 BSIRM

RIC VIII Sirmium 28. Rated Scarce.

From Dane's Collection, May 2010.