Helena, Mother of Constantine, 327 - 328 AD
AE Follis, Thessalonika Mint, 19mm, 2.37 grams
Obverse: FL HELENA AVGVSTA, Diademed and mantled bust of Helena right.
Reverse: SECVRITAS REIPVBLICAE, Securitas standing left holding branch and raising robe with right hand, SMTSA in exergue.
RIC159