Probus Antoninianus, struck AD 276-282 at Siscia mint. Obv: IMP PROBVS INV AVG, radiate, draped and cuirassed bust right. Rev: CONCORD MILIT / XXI (in exergue), Probus and Concordia standing facing one another, clasping hands; A between. 3,38 g, 21 mm. RIC 657.