Bronze antoninianus, 20mm, 2.18gm, issued AD 260. Cologne mint.
Obv: IMP C POSTVMVS PF AVG, Radiate, draped and cuirassed bust facing right.
Rev: SALVS PROVINCIARVM, Rhine reclining left hand on prow and holding anchor.
This was one of the earliest issues of Postumus' reign and dates to his capture of Cologne (on the Rhine) and the execution of Gallienus' son Saloninus.