Helena, mother of Constantine I (Augusta 324-330). AE Follis, Cyzicus mint, 325-326 AD. D/ FL HELENA AVGVSTA. Diademed and mantled bust right, wearing necklace. R/ SECVRITAS REI PVBLICE. Securitas standing facing, head left, lowering branch and raising robe with right hand; in exergue, SMKB•. RIC 39. AE. g. 4.16 mm. 21.00 R. About EF.