Watch List notes:

Probus. A.D. 276-282. AE antoninianus (23.4 mm, 3.88 g, 12 h). Serdica mint, struck A.D. 277. IMP C M AVR PROBVS P AVG, radiate, helmeted, and cuirassed bust of Probus left, holding shield, and spear over shoulder / VIRTVS PROBI AVG, emperor on horseback left, raising hand and holding scepter; captive to left; KA·Δ· in exergue. RIC 888. VF.

From the Tom Mullally Collection.