Watch List notes:

Diocletian (284-305). BI Antoninianus, Rome mint. Obv. IMP DIOCLETIANVS AVG. Radiate and draped bust right. Rev. IOVI CONSERVAT AVG. Jupiter standing left, holding thunderbolt and sceptre; in exergue, XXI Є. RIC V 161. BI. g. 4.54 mm. 23.50 Fully silvered with reddish highlights. From an exceptionally detailed reverse die. Insignificant flatness on edge. EF.