Helena, AE Follis, 3.04 gr, 20.02 mm. Siscia. 326-327 AD.

Obv: FL HELENA-AVGVSTA, diademed, draped bust right.
Rev: SECVRITAS-REIPVBLICE, Securitas standing left, lowering 
branch with left hand, raising robe with right hand.

RIC VII Siscia 204; cf Sear 3908.
Rare. Rated R1.