278 AD., Probus, Siscia mint, Æ Antoninianus, RIC 651.

Probus, Siscia mint, 2nd officina,
silvered Æ Antoninianus (22-24 mm / 3.81 g), 278 AD.,
Obv.: IMP CM AVR PROBVS AVG , radiate, draped and cuirassed bust of Probus r., seen from behind.
Rev.: CONCORD MILIT / B / XXI , Emperor standing r., clasping hand of Concordia, B between them, XXI in exe.
RIC 651 .