Watch List notes:

Probus (276-282). BI Antoninianus, Serdica mint. Obv. Bust left, radiate, helmeted. cuirassed, holding spear and shield. Rev. Horseman prancing right, holding large shield, spearing down enemy kneeling in front of horse. Cf. RIC V 878 (shield below horse). BI. 3.48 g. 22.00 mm. About EF.