Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (22mm, 3.78 g, 6h). MARTI CONSERVATORI Type. Londinium (London) mint. Struck circa AD 312-313. Helmeted and cuirassed bust left, holding spear in right hand over right shoulder and shield on left arm / Mars standing right, holding spear in right hand and resting left on shield; *|–//PLN. RIC VI 260; C&T 7.10.017. Green patina. Good VF. Rare.

From the Paul DiMarzio Collection. Ex ArtCoins Roma 9 (29 April 2014), lot 816.