Constantine I AE Follis, 4.29 grams, 22.14 mm. London. 310-312 AD.

Obv: CONSTANTINVS PF AVG, laureate and cuirassed bust right.
Rev: GENIO-POP ROM, Genius standing left, modius on head, loins 
draped, holding patera and cornucopiae.

Star in right field
Mintmark PLN.  

RIC VI London 212; cf Sear (1988) 3861.

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