This coin has a seen from the rear bust; which is not noted in RIC Vii.
It's one of the coded series. Another example with the same bust type is in the topic on these coins from Siscia-
https://www.lateromanbronzecoinforum.com/index.php/topic,1547.msg4768/Maximianus
A.D. 289- 290
Ӕ Antoninianus
23x24mm 3.2g
IMP C M A VAL MAXIMIANVS P F AVG; radiate and cuirassed bust right, seen from rear.
CONSERVATOR AVGG; Maximianus holding sceptre, and Hercules, leaning on club; standing face to face, sacrificing at altar; B in right field
In ex. XXIKOY
RIC V Siscia 580
