Claudius, AE antoninianus, Rome mint.

IMP C CLAVDIVS AVG, radiate, cuirassed bust right.
MARTI PACIFERO, Mars standing left, holding olive branch and spear, 
shield at foot.
Mintmark A (or H).

RIC V-1, 71 Rome var (mintmark and shield).

Contributed by Russell Stanley, June 2011