Roman Imperial
Helena, Augusta (324-328/30 AD). Thessalonica.
AE Follis (17.4mm 3.04g)
Obv: FL HELENA AVGVSTA. Diademed and mantled bust right.
Rev: SECVRITAS REIPVBLICE / SMTSB. Securitas standing left, lowering branch and raising robe with right hand.
RIC 159.