Constantius I Chlorus - Caesar 293-305 AD, Augustus 305-306 A.D. -  AE Follis - 27mm, 9.48gr
Obverse - FL VAL CONSTANTIVS NOB CAES
Constantius, his laureate head right.
Reverse - GENIO POPV-LI 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.
Two stars in left field, Crescent over S in right field.
ANT in Exergue.

Minted at officina 6 (S) in Antioch (Antakya, Turkey) in 298 A.D. during his reign as Caesar under Maximianus.

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Antioch, p620, nr 51a
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), Antioch, Constantius Chlorus, p38, nr 8.

General reference works (no exact determination):
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 6C
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p312, nr. 3673, variety.
Van Meter, D., "Handbook of Roman Imperial Coins", p280, nr 25, variety Ol/8.
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p418, nr. 54-57 variety (B08, O30, R034, T042, M2)

Quality: about Very Fine with partial silvering left on the coin.
Rarity: C