Bronze antoninianus, 23mm, 3.99gm, issued AD 276-282 Siscia mint.
Obv: IMP PROBVS PF AVG, Helmeted, radiate, cuirassed bust left, holding spear in right hand and shield in left hand.
Rev: PAX AVGVSTI (XXI in ex.), Pax, draped, standing left, holding olive-branch in right hand and sceptre in left hand.