The reverse of this coin has Fortuna holding a patera, normally she holds a rudder. Her headdress is also unusual. It reminds me more of a Genio reverse. For comparison, the second picture is Diocletian from the same Trier series.
Maximianus
A.D. 298- 299
IMP MAXIMIANVS PIVS AVG; laureate head right
FORTVNAE REDVCI AVGG NN; Fortuna seated left, holding patera in her right hand and cornucopiae in her left; A in left field, ✶ in right field.
In ex. TR
RIC VI Trier 232b var.
