Helena, AE follis of Nicomedia. AD 325-326. FL HELENA-AVGVSTA, diademed bust right, wearing mantle and necklace SECVRITAS-REIPVBLICE, Securitas standing left, lowering branch with left hand, raising hem of robe with right hand. Mintmark MN Gamma. RIC VII Nicomedia 129; Sear 16620 Rare, rated R2. Contributed by Roma Numismatics, Sept, 2013