Valerian I Antoninianus.  Mediolanum mint.

Obv: IMP VALERIANVS P F AVG, radiate, draped bust right.
(usually seen from the side, this coin appears to show the bust
from the back)

rev: VICT PART, Victory standing facing with shield and palm, captive
at foot.

Courtesy of cgb.fr, Feb, 2011