Constantine I (AD 307/310-337).
Follis
(AE, 20 mm, 3.69 g)
AD 320-321, Siscia.

CONSTANTINVS AVG Head of Constantine I right, laureate. / D N CONSTANTINI MAX AVG Laurel wreath containing VOT / XX; in exergue BSIS*.
RIC 159.
Dark patina. Extremely fine.