Helena AE Nummus, Siscia

Constantinus I 'the Great' (306-337 AD) for Helena. AE Nummus (18-20 mm, 3.10 g), Siscia, 328-329.
Obv. FL HELENA AVGVSTA, Draped bust to right.
Rev. SECVRITAS REI PVBLICE, Securitas standing left, lowering branch and raising robe with right hand; ESIS (double crescent) in exergue.
RIC VII Siscia 218.

Light green patina. Good very fine.