Constantine I, AE3, 318-319, Rome, Officina 1
CON_STANTI_NVS AVG
Helmeted, cuirassed bust left, spear pointing forward and shield in front
VIRTV_S AVGG
Campgate with five rows, three turrets, closed three-paneled doors with pellets, top and bottom rows empty blocks
P | R across fields
RP in exergue