Watch List notes:

Probus, 276-282. Antoninianus (Billon, 23 mm, 3.44 g, 12 h), Siscia, 5th officina, 277. IMP C M AVR PROBVS P F AVG Radiate bust of Probus to left, wearing imperial mantle, holding scepter surmounted by eagle. Rev. ADVENTV-S P-ROBI AVG / Є / XXI Probus on horseback to left, extending right arm in salute and holding long scepter in his left; under horse's raised leg, bound captive seated left. RIC 632. Dark green patina and very good centering; some original silvering on the fields. About extremely fine.