IMP CONSTANT-INVS AVG, cuirassed bust left, wearing high-crested helmet, holding spear and shield / VICTORIAE LAETAE PRINC PERP, two Victories supporting shield inscribed VOT PR over altar. Mintmark BSIS dot. 20mm, 2.55 grams. Siscia mint. RIC VII Siscia 61. SKU X3500-53324

Rare with the horseman on the shield Constantine is holding.