Carausius, AE Antoninianus, Rotomagus.

IMP C CARAVSIVS PF AVG, laureate, draped, cuirassed bust right.
FORTVNA AVG, Fortuna standing left, holding rudder and cornucopiae. 

RIC V-2, Rotomagus 639; Webb 696, rated Scarce.

Contributed by "newbeonecoinobe" of the Forvm Ancient Coins, May 2011