Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (19.5mm, 2.78 g, 7h). PRINCIPIA IVVENTVTIS Type. Londinium (London) mint. Struck AD 317. Laureate and cuirassed bust right / Constantine I standing right, cloak spread, holding reversed spear in right hand and resting left on shield; S|P//PLN. RIC VII 105c; C&T Supp. 8.09.010 (2) (this coin cited and illustrated). Dark green patina. Good VF. Very rare.

From the Paul DiMarzio Collection. Ex Paul Munro-Walker Estate (Roma E-Sale 35, 3 May 2017), lot 1513.