Probus (276-282). AE Antoninianus, Serdica mint. Obv. IMP C M AVR PROBVS AVG. Radiate bust left in imperial mantle, holding sceptre surmounted by eagle. Rev. SOLI INVICTO. Sol in spread quadriga, holding whip. RIC 862. AE. g. 4.15 mm. 22.50 EF. Fully silvered and toned. A superb coin.Provenance: