Watch List notes:

Postumus. Romano-Gallic Emperor, AD 260-269. Antoninianus (21mm, 3.32 g, 6h). Treveri (Trier) mint. 4th emission, 2nd phase, AD 267. Radiate, draped, and cuirassed bust right / Serapis standing left, raising hand and holding transverse scepter. RIC V 329 var; Mairat 130; AGK 90; RSC 360a. VF, toned, porosity.

From the Ken Bressett Collection. Ex ANA coin show c. 1960 @ $7.50.