Diocletian (284-305) AE Follis (Bronze, 9.79g, 25mm) Alexandria, 301.
Obv: IMP C DIOCLETIANVS P F AVG, laureate head to right
Rev: GENIO POPVLI ROMANI, Genius, wearing modius on head, standing to left, holding cornucopiae and patera, from which liquor flows; XX in left field, A above I in right field, ALE in exergue.
Ref: RIC VI 32a