Constantine I (307-337). AE Follis, contemporary barbarous imitation of a Siscia mint issue. D/ Laureate, helmeted, and cuirassed bust right. R/ wo Victories standing vis à vis, together holding on altar a shield with barbaric inscription; in exergue, [...]S(retrograde)IS. AE. g. 3.05 mm. 18.00 Lovely enamel like deep green patina. EF.