These are fairly common, but this one is pretty nice and has a lot of silvering left.
Constantine I
A.D. 307
25x26mm 7.1gm
CONSTANTINVS NOB CAES; laureate head right.
CONSERVATORES KART SVAE; Carthage standing facing, head left, holding fruits in both hands, within hexastyle temple with plain pediment.
In ex. PK∆
RIC VI Carthage 61