Watch List notes:

Probus. AD 276-282. AR Antoninianus (22mm, 4.10 g, 4h). Serdica mint, 4th officina. 4th emission, AD 277. Radiate, helmeted, and cuirassed bust left, holding spear over shoulder and plain shield / Sol in facing quadriga, head left, raising hand and holding whip; KA•Δ•. RIC V 862 var. (mintmark); Pink VI/1, p. 33. Toned, with some residual silvering, small rust spots. Good VF.