Watch List notes:

Constantine I. As Caesar, AD 306-309. Æ Quarter Follis (17mm, 1.80 g, 6h). Treveri (Trier) mint. Struck circa summer AD 307. Laureate, draped, and cuirassed bust right / VO/TIS/X in three lines within wreath. RIC VI 750. Good VF, dark brown patina, minor roughness. Rare.