Puede ser este AE3 de Constantino I de la ceca de Siscia 1ª oficina;
Constantine I Follis. IMP CONSTANTINVS AVG, head left in high-crested helmet, cuirassed, with spear & shield / VICTORIAE LAETAE PRINC PERP, 2 Victories standing holding shield inscribed VOT/PR on altar; ASIS in ex.
Siscia
RIC VII 50
http://wildwinds.com/coins/ric/constantine/_siscia_RIC_vII_050.A.jpg
Un saludo
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"Qvod tibi fieri non vis, alteri non feceris"