Constantius I Chlorus - Caesar 293-305 AD, Augustus 305-306 A.D.Post-Reform AE Radiate - 19.88mm, 3.00gr
Obverse - CONSTANTIVS NOB CAES
Constantius, his radiate, draped an cuirassed bust right.
Reverse - VOT XX Δ (delta)
In three lines in wreath

Minted at the 4th officina Δ (Delta) in Rome 297-298 A.D. during his reign as Caesar under Maximianus.

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Rome, p360, nr 88a
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), Rome, Constantius Chlorus, p221, nr 34.
Sear, D.R., "Roman Coins and their Values" (Sear RCV Millennium Edition), Vol. 4, p256, nr. 14112.

Other reference works:
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 23C
Van Meter, D., "Handbook of Roman Imperial Coins", p280, nr 34.
Suarez, R., "ERIC II - The Encyclopedia of Roman Imperial Coins" (ERIC II),  p791, nr.925 corr, (B44, O10, R118, T120, M11).
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 7, p91, nr. 337.

Quality: Very Fine
Rarity: S