Very nicely preserved Probus antoninianus.
Roman Imperial
Probus (276–282), Antoninianus 281-282, Siscia mint
Obverse: radiate bust of the emperor right
IMP C M AVR PROBVS AVG
Reverse: Pax standing left, holding olive branch and sceptre, V in right field, XXI in exerque
PAX AVGVSTI
Weight 3.5 g