Constans. AE3. Siscia. 

DN CONSTA-NS PF AVG, pearl diademed, draped, cuirassed 
bust right

FEL TEMP-REPARATIO, emperor on galley left, holding 
labarum and phoenix on globe; Victory at the helm. 

Mintmark Epsilon SIS[Symbol 4]
Symbol 4 not listed for this Constans Series.

RIC VIII Siscia 244.

Courtesy of Roma Numismatics, July, 2010