this coin has a rarer mintmark with a thunderbolt...Diocletian was in the family of Jupiter
Diocletian
A.D. 300- 301
28x29mm 8.9g
IMP C DIOCLETIANVS P F AVG; laureate head right.
SACRA MON VRB AVGG ET CAESS N N; Moneta standing left with scales & cornucopiae.
In ex. P thunderbolt
RIC VI Rome 100a