Green patina.
Roman Imperial
Constantine I the Great (308-337), Follis 320-321, Siscia mint
Obverse: laureate head of Constantine I to right
CONSTANTINVS AVG
Reverse: around wreath containing VOT XX in two lines, BSIS✱ in exergue
D N CONSTANTINI MAX AVG
Diameter 20 mm, weight 3.42 g
