RIC only lists this issue for Diocletian with an “I†in the left field.
Diocletian
A.D. 297- 298
26mm 9.3gm
IMP DIOCLETIANVS P F AVG; laureate head right.
FELIX ADVENT AVGG NN; Africa standing left, holding labarum and tusk; at feet, lion with captured bull. in ex. PKP, in left field H
RIC VI Carthage 23a