Carausius, AR denarius, London mint. 286-287 AD. 3,93 g.

IMP CARAVSIVS P F AVG, laureate, draped, cuirassed bust right.
CONCORDIA MILITVM, clasped hands. 
Mintmark RSR above when the hands are in the correct positions.  

RIC 548 (type 2).
Courtesy of TimeLine Originals (www.time-lines.co.uk), Jun, 2011