Maximianus, AE Antoninianus. Ticinum.

Obv: IMP C M VAL MAXIMIANVS P F AVG, radiate, draped, cuirassed bust right
Rev: IOVI CONSERVAT - Jupiter standing left, head 
right, holding thunderbolt and spear, two standards behind; 
eagle at feet left. 
Mintmark SXXIT 
Ticinum mint: AD 290 = RIC Vii, 561

Courtesy of dirtyoldcoins.com, July 2010.
(described on the doc website as 560 in error. RIC
560 has the obverse legend IMP C M A VAL MAXIMIANVS P F AVG,
561 has IMP C M VAL MAXIMIANVS P F AVG (not C M A)