Helena AE follis, Alexandria. 327-328 AD.

FL HELENA-AVGVSTA, draped bust right, wearing mantle and 
necklace.
SECVRITAS-REIPVBLICE, Securitas standing left, lowering 
branch with left hand, raising hem of robe with right 
hand.

Mintmark SMALA

RIC 38, Cohen 11; Sear 16629.