Roman Imperial
Helena, Augusta (324-328/30 AD). Thessalonica.
AE Follis (16.8mm 2.15g)
Obv: FL HELENA AVGVSTA. Diademed and mantled bust right.
Rev: SECVRITAS REIPVBLICE / SMTSA Securitas standing left, lowering branch and raising robe with right hand.
RIC VII 159