Diocletian (284-305 A.D.) -  Pre-Reform AE Antoninianus - 22.66mm, 4.28gr
Obverse: IMP DIOCLETIANVS AVG
Diocletianus, his radiate, draped and cuirassed bust right.
Reverse: IOVI AVGG
P in exergue.
Jupiter standing left, holding victory on globe and scepter;
at foot, eagle.

Minted at officina A in Lugdunum (Lyon, France) in 290 A.D.

Reference: 
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 5 (RIC), Part II, p224, nr 28 (C).
Voetter, Otto, "Die Münzen der römischen Kaiser, Kaiserinnen und Caesaren von Diocletianus bis Romulus, Katalog der
hinterlassenen Sammlung und Aufzeichnung des Herrn Paul Gerin" (Voetter-Gerin), Lugdunum, Diocletianus, p160, nr 25,
variation with radiate, helmeted and cuirassed bust right.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 7, p430, nr. 147.
Van Meter, D., "Handbook of Roman Imperial Coins", p276, nr. 25.
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p393, nr.75 variation O33 (B29, O33, R057, T074, M08)

Quality: Very Fine+
Rarity: Common