This coin has an unusually large flan that shows all the circular beaded border.
Crispus
A.D. 321
20x22mm 3.0gm
CRISPVS NOB CAES; laureate and cuirassed bust right.
BEATA TRANQVILLITAS; Globe set on altar insc. VO/TIS/XX; above three stars.
In ex. PLG
RIC VII Lyons 133