Probus, AE antoninianus. Siscia.

IMP PROBVS PF AVG, radiate, cuirassed bust left.
PAX AVGVSTI, Pax standing left, holding olive-branch and sceptre.
Officina letter P in right field.
Mintmark XXI

RIC V-2 Siscia 713.

Contributed by Uwe Neumann, Dec. 2011