I am not sure what is in the center on the reverse; but here is an example from Cyzicus to compare with.

Diocletian
A.D. 295- 299
AE Antoninianus
21mm 2.6g
IMP C C VAL DIOCLETIANVS P F AVG; radiate & cuirassed bust right
CONCORDIA MI-LITVM; Diocletian standing right receiving Victory from Jupiter standing left with long scepter; K gamma in center.
RIC VI Cyzicus 15a

Diocletian
A.D. 295- 299
AE Antoninianus
21mm 2.6g
IMP C C VAL DIOCLETIANVS P F AVG; radiate & cuirassed bust right
CONCORDIA MI-LITVM; Diocletian standing right receiving Victory from Jupiter standing left with long scepter; K gamma in center.
RIC VI Cyzicus 15a
























