Watch List notes:

Postumus. Romano-Gallic Emperor, AD 260-269. AR Antoninianus (20mm, 3.39 g, 6h). Treveri (Trier) mint. 4th emission, 1st phase, AD 266. Radiate, draped, and cuirassed bust right / Signum surmounted by hand and aquila flanked by two signa. RIC V 303; Mairat 120; AGK 20; RSC 65. Toned, some verdigris. Good VF.