Watch List notes:

Constantine I. A.D. 307/10-337. Æ follis (18 mm, 2.96 g, 12 h). Siscia, A.D. 321-324. Laureate head of Constantine I right / VOT/XX in two lines within wreath; BSIS(sunburst). RIC 180. Dark green patina with golden undertones. Extremely fine. 

From the Maple Leaf Collection.