Constantine I, AE follis, Siscia.

Obv: IMP CONSTANTINVS AVG - Helmeted laureate bust left, 
cuirassed, holding spear over right shoulder and shield on left arm. 
Rev: VICT LAETAE PRINC PERP - Two Victories facing 
inscribing VOT PR on shield placed on altar; 'I' on cippus. 

Mintmark: dot ASIS dot.

RIC VII, Siscia, 82 rated Rare.
With permission of www.constantinethegreatcoins.com