Helena AE Nummus, Siscia

Constantine the Great (307-337 AD) for Helena . AE Nummus (18-19 mm, 3.12 g), 326-328 AD, Siscia.
Obv. FL HELENA AVGVSTA, Diademed and draped bust to right.
Rev. SECVRITAS REIPVBLICE, Securitas standing left, holding branch pointing down in left hand, raising pallium with right; ΓSIS (crescent) in exergue.
RIC VII Siscia 218.

Brown patina. Extremely fine.