A common example of this issue.
Obverse: the emperor’s head wearing a laurel wreath, facing right; the legend around the edge reads:
IMP C DIOCLETIANVS P F AVG;
Reverse: Genius standing facing left, holding a platter and a cornucopia; the legend on the rim reads:
GENIO POPVLI ROMANI, with the letter P* in the field;
Diameter 27 mm, weight 9 g.
