Crispus, AE Follis, Lyons, 322-323 AD.

IVL CRISPVS NOB CAES, laureate, cuirassed bust left, holding spear
pointing fowards in right hand and shield on left arm.
BEATA TRA-NQVILLITAS, globe with lines of latitude and longitude,
on altar inscribed VO - TIS - XX, three stars above.
C-R across fields. 
Mintmark PLG dot
RIC VII Lyons 162 var (mintmark)

Courtesy of CGB France, Nov. 2009.