Constantine I AE Follis. ca 313 AD. Trier.

IMP CONST-ANTINVS AVG, helmeted, draped & cuirassed bust left 
holding spear over shoulder
VICTORIAE LAETAE PRINC PERP, 2 Victories standing facing each 
other holding shield inscribed VOT PR on altar with square 
design (Helv. 4b)

Mintmark PTR in ex. 

RIC VII Trier 208a, Rare (R3)

With permission of Roma Numismatics, August 2009