In the reverse legend, it looks like the engraver made an error and then re-engraved it-- the first S of CAESARIS has something under it...oops.
Maximinus II
A.D. 308
24mm 7.2g
GAL VAL MAXIMINVS NOB CAES; laureate head right.
GENIO CAESARIS; Genius standing left, modius on head, naked except for chlamys over left shoulder, holding patera from which liquid flows & cornucopiae; X in left, S over K in right.
In ex. ALE
RIC VI Alexandria 78