Watch List notes:

Constantine I. As Caesar, AD 306-309. Æ Follis (27mm, 6.10 g, 12h). Treveri (Trier) mint, 1st officina. Struck AD 307. Laureate and cuirassed bust right / Genius standing left, holding patera and scepter; S-A//PTR. RIC VI 719b. Dark green to black surfaces, numerous fine cleaning scratches. Good VF.