This coin is not listed in RIC for the bust left.
Diocletian
A.D. 285
23mm 2.9gm
IMP C C VAL DIOCLETIANVS P F AVG; radiate and cuirassed bust left.
IOVI CONSERVAT; Jupiter stg. l., holding thunderbolt and sceptre; before him, small figure of emperor.
In ex. QXXIT
RIC V Ticinum 220 var