También puede ser Sirmio...........:
Helena, AE3, 324-325, Sirmium
FL HELENA-AVGVSTA
Pearl-diademed, mantled bust right, wearing necklace, hair brushed
straight back, small curls along forehead to ear, loop braid at base
of head carried up in long plait to top of diadem and back down
again tucked under bottom of diadem
SECVRITAS-REIPVBLICE
Securitas standing left, branch downward in right hand, raising robe
with left
SIRM in exergue
RIC VII, 54
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"Qvod tibi fieri non vis, alteri non feceris"