Constantine I, 306-307 AD. AE Follis, Siscia. 18-20mm, 2.4 g. 

obv: IMP CONSTANTINVS AVG, laureate, helmeted and cuirased bust right. 

rev: VICTORIAE LAETAE PRINC PERP, two Victories standing facing one another, together holding shield inscribed VOT PR on altar. Mintmark E

SIS star.

RIC VII 48.