Nummus - Constantius II FEL TEMP REPARATIO, Sirmium

Sirmium — modern Sremska Mitrovica in Serbia — was one of the most strategically critical mints of the late empire, sitting on the main military corridor between the Danube frontier and Italy. Constantius II elevated it significantly after his defeat of the usurper Magnentius at the Battle of Mursa in 351, one of the bloodiest Roman engagements in centuries, with combined losses estimated near 54,000 men. The FEL TEMP REPARATIO bronze issues that followed were partly a propagandistic response to that war, asserting restored imperial felicity after years of civil conflict.

RIC VIII #40 is among the falling horseman type, produced at Sirmium during the mint's peak output years before Constantius shifted priorities westward.