Carausius, AR denarius, Uncertain British mint. AD 286-293. 3.82 g. 

IMP CARAVSIVS PF AVG, laureate, draped and cuirassed bust right.
FELICITAS, Galley right with four rowers and eleven oars over waves. 
Mintmark RSR. 
RIC V-2, London 560; Webb 614; Cohen 66; RSC 53; Shiel 55-57; Sear 13510.
Rated R2.

With permission of cngcoins.com, Triton XIII, Jan. 2010.