Constans, AE3 of Siscia, 346-348 AD.
 
Obv: CONSTANS P F AVG, laurel and rosette-diademed, draped and 
cuirassed bust right
Rev: GLORIA EXERCITVS, two soldiers, each holding spear and
shield, one standard between them with chi-rho on banner.

Mintmark Delta SIS.
RIC VIII Siscia 88, rated common.

With permission of ArtCoinsRoma, July 2012.