Probus, 276-282. Antoninianus (Billon, 23 mm, 3.93 g, 12 h), Serdica, 277. IMP C M AVR PROBVS INVICT AVG Radiate, draped and cuirassed bust of Probus to right. Rev. SOLI INVICTO / KA B Sol, head left, raising hand and holding whip, in spread quadriga facing. Cohen 686. RIC 867 note. Well struck and clear with redish patina and an interesting variation of the inscription. Good very fine.