Constantine I AE Follis. 319-320 AD. London mint,

IMP CONSTANTINVS AG, helmeted, cuirassed bust left, spear over shoulder
VICTORIAE LAETAE PRINC PERP, two Victories standing 
facing each other, holding between them a shield 
inscribed VOT PR on altar decorated with a diamond 
(altar type Helv. 2a).

Mintmark PLN.

RIC VII London 159, rated R1

Dane's collection, July 2009