Roman Imperial
Helena Augusta (325-329, mother of Constantine), Follis 328-329, Siscia mint
Obverse: diademed and draped bust right
FL HELENA AVGVSTA
Reverse: Securitas standing left, lowering branch with left hand, raising robe with right hand, ESIS double crescent in exergue
SECVRITAS REIPVBLICE
Diameter 18 mm, weight 2.82 g