Constantine I AE Follis 2.65 gr, 20.03 mm. London. 320-321 AD.

Obv: CONSTAN-TINVS AVG, helmeted, cuirassed bust right.
Rev: VIRTVS-EXERCIT, two captives seated at the base of a 
standard inscribed VOT XX. 

Mintmark PLON.

RIC VII London 185; Sear 3885.

Courtesy of TimeLine Originals (www.time-lines.co.uk), March. 2010