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 Delta SIS[Symbol 4]
Symbol 4 not listed for this Constans Series.
The symbol here is a little different, resembling )-

RIC VIII Siscia 244.

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