Diocletian (284-305 A.D.) -  Post-Reform AE Radiate - 20.39mm, 2.99gr
Obverse
IMP C C VAL DIOCLETIANVS PF AVG
Diocletian, his radiate, draped and cuirassed bust right
Reverse
CONCORDIA MILITVM, K E  in field.
Diocletian, standing right in military dress receving small victory on globe
from Jupiter, standing left, leaning on spear in left hand.

Minted at officina E in Cyzicus (Balkiz, Turkey) between 295 and 299 A.D.
Reference: 
Webb, P.H., "Roman Imperial Coinage", Volume 6 (RIC), Cyzicus, p581, nr 16a [Obverse 1a (C)]
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 11D
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p304, nr. 3540, variety from Cyzicus mint
Van Meter, D., "Handbook of Roman Imperial Coins", p277, nr. 49
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p392, nr.47 variation B29 (B29, O26, R015, T031, M05)
Quality: Very Fine+