Watch List notes:

Postumus. Romano-Gallic Emperor, A.D. 260-269. AR antoninianus (21.9 mm, 3.07 g, 7 h). Treveri mint, struck A.D. 263-263. IMP C POSTVMVS P F AVG, radiate, draped, and cuirassed bust right / PAX AVG, Pax running left, holding branch and scepter. RIC 78; AGK 51; RSC 220. Good VF. 

Ex Paris collection.