Probus (276-282) AE Antoninianus (Bronze, 3.42g, 23mm) Serdica, 280-281.
Obv: IMP C M AVR PROBVS AVG, Radiate, helmeted and cuirassed bust left, holding spear and shield.
Rev: SOLI INVICTO / KAB, Sol driving facing quadriga, head left, holding whip.
Ref: RIC 862