Carausius, AE antoninianus. Camulodunum mint. 

IMP C CARAVSIVS P AVG, radiate, draped and cuirassed 
bust right.
PROVID AVG, Providentia standing left, holding globe and 
cornucopiae. 
S-C across fields. 

RIC V-2, Camulodunum 502 var (obv. legend).