Constantius I Chlorus - Caesar 293-305 AD, Augustus 305-306 A.D. -  AE Follis - 27mm, 8.84gr
Obverse - IMP C FL VAL CONSTANTIVS P F AVG
Constantius, his laureate head right.
Reverse - GENIO POPV-L-I ROMANI
Genius standing left, modius on head, naked but for
chlamys over left shoulder, holding patera (from which
liquor flows) in right and cornucopiae in left hand.
HTG in Exergue.

Minted at officina 3 (G) in Heraclea (Marmara Ereglisi, Turkey) in 305 or 306 A.D..

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Heraclea, p533, nr 24a.
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), Heraclea, Constantius Chlorus, p113, nr 8.
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p419, nr. 66 (B08, O36, R034, T042, M5)

General reference works (no exact determination):
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p312, nr. 3683, variety from Heraclea mint.
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 46aC
Van Meter, D., "Handbook of Roman Imperial Coins", p280, nr 26, variety Ol IMPCFLVALCONSTANTIVSPFAVG.
Kankelfitz, B.R., "Katalog römischer Münzen, von Pompejus bis Romulus, Band II", p418, 13V, Av. L IMPCFLVALCONSTANTIVSPFAVG.
Kampmann, U., "Die Münzen der römischen Kaiserzeit", p380, nr. 121.68.

Quality: Very Fine+
Rarity: C