Green patina.
Roman Imperial
Constantine I the Great (307–337), Follis 307, Trier mint
Obverse: laurate, draped and cuirassed bust right
FL VAL CONSTANTINVS NOB C
Reverse: Genius standing left, holding patera and cornucopiae, S-A across the fields, PTR in exergue
GENIO POPVLI ROMANI
Diameter 28 mm, weight 7.57 g