this example is almost fully silvered
Diocletian
A.D. 298-303
27x29mm 9.3g
IMP DIOCLETIANVS P F AVG; Laureate head right.
SALVIS AVGG ET CAESS FEL KART; Carthage standing facing, head left, holding fruits in both hands.
In ex. A
RIC VI Carthage 27a/31a
This type references the victory of Maximianus over the Quinquegentiani -- a rebellious tribe in North Africa.