Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (23mm, 4.40 g, 6h). MARTI CONSERVATORI Type. Londinium (London) mint. Struck circa AD 312-313. Laureate, helmeted, draped, and cuirassed bust left, holding spear forward in right hand, shield on left arm / Mars standing right, holding reversed spear in right hand and shield in left set on ground to right; *|–//PLN. RIC VI –; C&T 7.10.015. Brown surfaces, coppery highlights, dark green encrustations. Near VF. Very rare.

From the Paul DiMarzio Collection, purchased from Angel Fernandez (Ancient Delights on VCoins), 5 August 2010.