Galerius - Caesar 293-305 AD, Augustus 305-311 A.D. -  AE Follis - 27mm, 8.12gr
Obverse - MAXIMIANVS NOBIL C
Galerius, his laureate and cuirassed bust right.
Reverse - GENIO POPV-LI ROMANI
Genius standing left, modius on head, naked but for
chlamys over left shoulder, holding patera in right and
cornucopiae in left hand.
S in left, F in right field, IITR in Exergue.

Minted in at officina 2 (II) at Treveri (Trier, Germany) in 302-303 A.D. during his reign as Caesar under Diocletian.

Reference:
Sutherland, C.H.V., "Roman Imperial Coinage", Volume 6 (RIC), Treveri, p196, nr 508b.
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), Treviri, Galerius Maximianus, p383, nr 84.
.
General reference works (no exact determination):
Failmezger, V., "Roman Bronze Coins From Paganism To Christianity 294-364 A.D.", nr 6G
Van Meter, D., "Handbook of Roman Imperial Coins", p281, nr 9, variety with obverse legend MAXIMIANVS NOBIL C.
Suarez, R., "Encyclopedia of Roman Imperial Coins" (ERIC),  p418, nr. 77 variety B16 (B16, O45, R038, T031, M16)

Quality: about Very Fine
Rarity: C