Maximinus II, as Filius Augustorum, AE Follis. 308-309 AD. 

MAXIMINVS FIL AVGG, laureate head right.
GENIO CAESARIS, Genius, half naked and wearing modius, standing left, holding cornucopia and patera.

Star in left field, Delta in right field.

Mintmark dot SM dot TS dot. 

RIC VI 32a.