I just got this one. This type with wreath in pediment can have Roma with or without a shield. This example is missing the acroteria...it seems it got too crowded and they had to be left off the temple.
Constantine I
Autumn A.D. 307
Ӕ Follis 24x25mm 6.2g
CONSTANTINVS NOB CAES; Laureate head right.
CONSERVATORES VRB SVAE; Roma seated facing, head left, in hexastyle temple, globe in right hand, scepter in left and shield at side; wreath in pediment; no acroteria
In exergue R ✶ Q
RIC VI Rome 200