Constantine I (307-337). AE Follis, Ostia mint, 312-313 AD. Obv. IMP C CONSTANTIVS PF AVG. Laureate and cuirassed bust right. Rev. SPQR OPTIMO PRINCIPI. Legionary eagle between two vexilla; in exergue, MOSTP. RIC VI, 96. AE. g. 4.16 mm. 21.50 R. Rare. From well detailed dies. Green-brown patina. Minor areas of flatness, otherwise EF.