Helena, mother of Constantine I. AE Follis, Siscia mint, 326-328 AD. D/ FL HELENA AVGVSTA. Diademed and draped bust right. R/ SECVRITAS REIPVBLICE. Securitas standing left, holding branch pointing down and raising robe with right hand; in exergue, ΓSIS double crescent. RIC 218. AE. g. 3.12 mm. 18.50 An outstanding example, from fresh and masterly engraved dies. Superb brown patina. EF.