Diocletian (284-305 A.D.) -  Post-Reform AE Radiate - 20.05mm, 3.02gr
Obverse
IMP C C VAL DIOCLETIANVS PF AVG
Diocletian, his radiate, draped and cuirassed bust right
Reverse
CONCORDIA MILITVM,
H Delta  in Exergue
Diocletian receiving Victory on globe from Jupiter, leaning on sceptre.

Minted in Heraclea (Marmara Ereglisi, Turkey) at officina Delta, in 295 or 296 A.D.
Reference: 
Webb, P.H., "Roman Imperial Coinage", Volume 5, Part 2 (RIC), p531, nr 13, 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 Heraclea mint
Van Meter, D., "Handbook of Roman Imperial Coins", p277, nr. 49
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p393, nr.58 (B29, O26, R015, T031, M06)
Quality: Very Fine, with weak legends