Here is an unofficial argenteus from Carthage. The reverse was engraved in particularly poor style. For comparison, the second coin below is an official version of Constantius.
Diocletian
AD 296- 298
AR Argenteus
19mm 3.0g
DIOCLETIANVS AVG; Laureate head right
F ADVENT AVGG N N; Africa standing facing, head left, holding standard and tusk; at her feet, lion standing left, head right, with bucranium to left.
In ex. P
Cf. RIC VI Carthage 13a