this coin has an unusual bust type coupled with a rarer reverse.
Maximianus
A.D. 291
22x23mm 4.4gm
IMP C M A VAL MAXIMIANVS P AVG; radiate head right.
VICTORIA AVGG; Maximianus stg. l., receiving Victory on globe from Diocletian; in center A.
In ex. XXI
RIC V Siscia 586