Watch List notes:

Diocletian (284-305). BI Antoninianus, Rome mint. Obv. IMP DIOCLETIANVS AVG. Radiate and draped bust right. Rev. IOVI CONSERVAT AVGG. Jupiter standing left, holding thunderbolt and sceptre; in exergue, XXIA. RIC V 162. BI. g. 4.21 mm. 22.00 Reddish surfaces, traces of silvering. About EF.