Constantine I (307-337). AE Follis, Rome mint, 312-313 AD. Obv. IMP CONSTANTIVS PF AVG. Laureate, draped and cuirassed bust right, seen from rear. Rev. SPQR OPTIMO PRINCIPI. Legionary eagle between two vexilla; in exergue, RP. RIC VI, 351 a. AE. g. 4.49 mm. 23.00 R. Rare and superb. Nice chocolate brown patina; minor area of flatness on reverse, otherwise EF.