Diocletian AE Follis. Alexandria. 25 mm, 9.89 g.

IMP C DIOCLETIANVS PF AVG, laureate head right 
GENIO POPVLI ROMANI, Genio standing left, modius on head, naked, 
  except for chlamys over left shoulder, holding patera and cornucopiae. 

left field: XXI; right field: Delta.
Mintmark ALE.

RIC VI Alexandria 30a; Sear 12803. 

Triskeles Sale 28, Lot 425 on vauctions, June 2019.