Watch List notes:

Postumus, 260-269. Antoninianus (Silver, 20 mm, 3.43 g, 8 h), Cologne, 266. IMP C POSTVMVS P F AVG Radiate, draped and cuirassed bust of Postumus to right. Rev. SALVS POSTVMI AVG Salus standing right, feeding snake holding in her right hand out of patera. AGK 86. Cohen 350. Cunetio 2423. RIC 328. Well struck, nice details. Good very fine.
From a European collection, formed before 2005.