Watch List notes:

Constantine I (307-337). AE Follis, Rome mint. Obv. Rosette-diademed, draped and cuirassed bust right. Rev. CONSTAN/TINVS/AVG in three lines; above, wreath; below, SMRP. RIC 281. AE. g. 2.04 mm. 17.50 RRRR. Extremely rare. A pleasant example. Dark green patina. Good VF.