Bronze, 2.65 grams, 20.03 mm. London. 320-321 AD. Obverse: CONSTAN-TINVS AVG, helmeted, cuirassed bust right. Reverse: VIRTVS-EXERCIT, two captives seated at the base of a standard inscribed VOT XX. Mintmark PLON in exergue. RIC VII London 185; Sear 3885. Very fine-good very fine. A significant coin which has been published on wildwinds.com