Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (22mm, 4.48 g, 6h). Treveri (Trier) mint, 1st officina. Struck AD 310-313. Laureate, draped, and cuirassed bust right / Mars standing right, holding reversed spear and shield set on ground; T|F//PTR. RIC VI 863. Dark brown patina. Good VF.