Watch List notes:

Probus, 276-282. Antoninianus (Billon, 23.5 mm, 3.88 g, 12 h), Serdica, 4th officina, 277. IMP C M AVR PROBVS P F AVG Radiate bust of Probus to left, wearing imperial mantle and holding eagle tipped scepter in his right hand. Rev. SOLI INVICTO / KA•Δ• Sol, head left, raising hand and holding whip, in spread quadriga facing. RIC 861. With intact original silvering and a spectacular reverse. Nearly extremely fine.