Watch List notes:

Constantine I, 307-337 Follis Treveri circa 307-late 308, Æ 27mm., 7.28g. Laureate and cuirassed bust r. Rev. Mars standing r., holding reversed spear and shield set on ground; in field, S-A and in exergue, PTR. RIC 772a.

Nice dark green patine, Extremely Fine.