Watch List notes:

Diocletian, 284-305. Antoninianus (Billon, 21 mm, 3.19 g, 12 h), Rome, 4th officina, 285-286. IMP DIOCLETIANVS AVG Radiate, draped and cuirassed bust of Diocletian to right, seen from behind. Rev. IOVI CONSERVAT AVGG / XXIΔ Jupiter standing left, holding thunderbolt in his right hand and long scepter in his left. Cohen 228. RIC 162. A well struck, clear Antoninianus with a bold portrait of Diocletian and sharp details. Nearly extremely fine.