Constantius II. As Caesar, AD 324-337. Æ Follis (20mm, 2.45 g, 6h). Londinium (London) mint. Struck circa AD 325. FLA CONSTANTIVS N C, laureate, draped, and cuirassed bust right / PROVIDEN TIAE CAESS, city gate with two turrets, without doors, star above, five stone layers; –|–//PLON. RIC VII –; C&T 10.02.006. Red-brown patina, edge chipped. VF. Extremely rare.
From the Paul DiMarzio Collection, purchased from Lee Toone (Hookmoor Ancient Coins), 30 January 2017. Found by a metal detectorist, South Wales, 4 December 2016 (PAS CORN-E0D45C [misidentified there]).
From Lee Toone: "Only the second known example, and from the same obverse die."