This bust type is not listed in RIC, though it is my second example; however this one is easily the best of the two.
Maximianus
A.D. 289- 290
Ӕ Antoninianus 23mm 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; Γ in right.
In ex. •XXI•ΛI•
RIC Vii Siscia 580 var. (bust type)
Ex CNG inventory 10250 (25 February 1992).