Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (24mm, 3.95 g, 6h). Londinium (London) mint. Struck circa AD 311-312. Laureate and cuirassed bust left, holding spear forward in right hand and shield on left arm / Concordia standing left, holding signum in each hand; –|*//PLN. RIC VI –; C&T 7.04.019 (this coin cited and illustrated). Dark brown patina, some earthen deposits. VF. Very rare bust type.

From the Paul DiMarzio Collection, purchased from Lee Toone (Hookmoor Ancient Coins FPL 1), 12 February 2016, who previously purchased it from Clive Eyre, October 2013 (for £175).