Watch List notes:

Constantine I, 307/310-337. Follis (Bronze, 19 mm, 2.53 g, 5 h), Rome, 1st officina, 320-321. CONSTA-NTINVS AVG Laureate head of Constantine to right. Rev. D N CONSTANTINI MAX AVG around wreath containing VOT • XX; below R(ℇω)CP. RIC 225. Extremely rare, and with a most unusual mintmark. Virtually as struck.