Diocletian, AE Antoninianus, Lyons mint, 286 AD.

IMP CC VAL DIOCLETIANVS PF AVG, radiate, draped, cuirassed bust right
IOVI CONSERVATORI, Jupiter standing left, chlamys hanging 
from left shoulder, holding thunderbolt and leaning on 
sceptre (or barbed spear?)
D in left field

RIC V-2 47 Lyons, rated common
Kampmann 119.37.1

Submitted by Stefan Weber.  September, 2009