Diocletian (284-305 AD). AE Antoninianus. Lugdunum (Lyon) mint, 287-288 AD. Obv. IMP C C VAL DIOCLETIANVS P F AVG. Radiate, draped, and cuirassed bust right, seen from behind. Rev. IOVI CONSER AVGG. Jupiter standing left, holding thunderbolt and sceptre; to left, A above eagle. RIC V 35. 4.03 g. 23.00 mm. Lovely warm brown patina. About EF.