Watch List notes:

Constantine I, 307/310-337. Follis (Bronze, 20 mm, 2.68 g, 5 h), Rome, 318-319. CONSTA-NTINVS AVG Laureate, helmeted and cuirassed bust of Constantine I to left, holding spear over his right shoulder and shield on his left. Rev. SAECVLI FELICITAS / P - R / RT Shield inscribed AVG set on garlanded cippus. http://www.notinric.lechstepniewski.info/6ale-48b_con.html. RIC -. Of the highest rarity, apparently the second known example. Slightly rough, otherwise, very fine.