Carausius AE Antoninianus. C mint. 

IMP CARAVSIVS PF AVG, radiate, draped, cuirassed bust right.
PAX AVG, Pax standing left, holding olive branch and vertical sceptre. No field marks.
Mintmark C. 

RIC V-2, Camulodunum 303. 

Ebay sale by Harlan J. Berk, 2003.