Maximianus (286-305, 306-308, 310 A.D.) -  AE Follis of his 1st reign - 29x26mm, 8.56gr
Obverse IMP C M A MAXIMIANVS PF AVG
Maximianus, 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.
KE in Exergue.

The images below were photographed by Ancient Imports (top) and Et Tu Antiquities (bottom) respectively.
The image above is my own scan.
The coin is featured on Wildwinds at http://wildwinds.com/coins/ric/maximianus/_cyzicus_RIC_010b.4.jpg
Text at http://wildwinds.com/coins/ric/maximianus/_cyzicus_RIC_010b.4.txt
Minted at officina E in Cyzicus (Balkiz, Turkey) in 295 or 296  A.D.

Reference: 
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Cyzicus, p580, nr 10b.
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), Kyzikos, Maximianus Herculius, p133, nr 13.
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 6M
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p309, nr. 3631, variety from Cyzicus mint.
Van Meter, D., "Handbook of Roman Imperial Coins", p278, nr. 39, variety with Ol/6
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p401, nr. 67-74 variety M04 (B20, O32, R056, T028, M04)

Quality: Extra Fine
Rarity: C