Probus AE Antoninianus. Siscia Mint. IMP PROBVS P F AVG, Radiate, cuirassed bust r. / PAX AVGVSTI, Pax standing l. holding olive branch in r. and transverse scepter in l. Q in r. field, XXI in exe. Emission 7 Officina 1. Minted 280 A.D. References RIC 713 Bust Type F (Rated Scarce). Weight 3.43 gms. Size 20.98mm Contributed by Martin Griffiths, March, 2004.