Postumus. AR Antoninianus, Cologne. AD 260-269. 22 mm, 4.20 g.

IMP C POSTVMVS P F AVG, radiate, draped and cuirassed bust right.
SERAPI COMITI AVG, Serapis standing left, holding sceptre and raising right hand. 

RIC V 329; Schulzki 90; RSC 360a; Cunetio 2437; Elmer 383.

With permission of Leu Numismatik AG auction 21, Lot 4982, July 2022