Diocletian (AD 284-305).
Antoninianus
(AE, 22 mm, 3.81 g)
AD 287-288, Lugdunum.

IMP C C VAL DIOCLETIANVS P F AVG Bust of Diocletian right, radiate, draped and cuirassed. / IOVI CONSER AVGG Jupiter standing left, holding thunderbolt in right hand and sceptre in left hand; at foot, eagle; in right field A, in exergue SML.
RIC 35.
Toned silvering with some iridescence. Struck from a slightly worn reverse die. Almost extremely fine.