Galerius AE Follis. 299-300 AD. 

GAL VAL MAXIMIANVS NOB CAES, laureate head right.
GENIO POPVLI ROMANI, Genius standing left, modius on head, 
chlamys over shoulder, holding patera from which liquid flows, and cornucopiae. 
Z in right field.
Mintmark ANT. 

RIC VI 53b.

With permission of cngcoins.com, part of a 6-coin lot,
Auction 242, Lot 364. Sold for $205 (6 coins).