Constantine I, AE follis, Siscia. 

CONSTANT-INVS AVG, helmeted, cuirassed bust left, holding
spear and shield.
VICT dot LAETAE PRINC PERP, two Victories standing facing 
each other, holding shield inscribed VOT PR on an altar 
decorated with the letter I (Helvetica 62). 

Mintmark BSIS dot. 

RIC VII 102 var (officina).

ebay sale, June 2010