Rome Mint Curved Roofline Campgate
Constantine I, AE3, Rome, Officina 2
High-crested helmet, cuirassed bust right
Campgate with six rows, three turrets, closed six-paneled doors, no star above, top and bottom rows empty blocks, curved roofline
P | R in fields
RS in exergue
RIC VII, --
Note: Bust type D7 not attested for three turret series in RIC. Only the second curved roofline example I've seen in the 5 years I've been collecting campgates.