Watch List notes:

Constantine II. As Caesar, AD 316-337. Æ Follis (20mm, 3.63 g, 6h). Rome mint, 2nd officina. Struck AD 320. Laureate, draped, and cuirassed bust right / Roma seated right on round shield, holding another round shield inscribed X/V in two lines; R(serpent)CS. RIC VII 200. VF, dark brown and green patina. Rare.