Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (22mm, 3.88 g, 6h). PRINCIPI Two Standards Type. Londinium (London) mint. Struck circa AD 311-312. Helmeted and cuirassed bust left, holding spear in right hand over right shoulder, shield on left arm / Prince standing left, holding signum in each hand; –|*//PLN. RIC VI –; C&T 7.06.006. Brown patina, obverse die wear, traces of silvering. VF. Very rare.

From the Paul DiMarzio Collection. Ex Roma E-Sale 35 (3 May 2017), lot 1485.