Claudius Gothicus AKA Claudius II AE Antoninianus (19mm, 3.6g)
Milan (Mediolanum), AD 268-270. IMP CLAVDIVS PF AVG, radiate, draped and cuirassed bust right / PAX AVG, Pax advancing/walking left, holding olive branch and transverse sceptre.
I'm just not sure if it's RIC 157, 157v, or 158t:
http://www.wildwinds.com/coins/ric/claudius_II/t.html