Helena, mother of Constantine I (Augusta 324-330). AE Follis, Treveri (Trier) mint, struck under Constantine I, 327-328 AD. D/ Diademed and mantled bust right, wearing necklace. R/ Securitas standing facing, head left, holding olive branch and lifting dress; in exergue, PTRE. RIC 508. AE. g. 2.90 mm. 18.50 Nice emerald green patina. EF.