Constantine I. AE Follis, Trier. 319 AD. 

CONST-ANTINVS AVG, cuirassed bust left, wearing high-crested helmet, 
holding spear over shoulder. 
VICTORIAE LAETAE PRIN P, two Victories holding shield inscribed VOT PR 
over altar. Altar decoration type Helv. 5c (an X). 

Mintmark dot STR. 

RIC VII Trier 225. Of the highest rarity (R5).

With permission of Roma Numismatics, Jul, 2010