Watch List notes:

Postumus ( Usurper in Gaul, 260-269 A.D.). Antoninianus, Cologne mint, 269 AD. Obv. IMP C POSTVMVS P F AVG. Radiate, draped and cuirassed bust right. Rev. IMP X COS V. Nemesis, half naked, standing right, her right hand raised to her head, holding a long vertical palm frond in her left. RIC V 289. BI. 3.86 g. 21.00 mm. A superb example, in outstanding condition. Lovely bright brown surfaces, with silver highlights. Good EF.