Maximinus II Follis 

Obv: IMP C GAL VAL MAXIMINVS P F AVG - Laureate head right. 
Rev: GENIO AV-G-VSTI CMH - Genius standing left, holding patera and cornucopiae. 
S in right field.
Mintmark MKV

Cyzicus mint: AD 311 
RIC VI, 86a