Watch List notes:

Constantine I. A.D. 307/10-337. Æ follis (19 mm, 2.58 g, 7 h). Thessalonica, A.D. 328. Diademed, draped and cuirassed bust of Constantine I right / Camp-gate surmounted by two turrets; above, star; SMTSA. Cf. RIC 170/153 (obv./rev.). Black-green patina, slightly rough. Not recorded in RIC. Good very fine. 

From the Maple Leaf Collection.