Postumus Antoninianus, struck 262 AD at Cologne mint.
Obv: IMP C POSTVMVS P F AVG, radiate, draped and cuirassed bust right.
Rev: SALVS AVG, Salus standing left, holding patera in right hand from which a snake, which is rising from small altar placed on ground to left, is feeding; in her left hand Salus holds a rudder.
RIC 85; Elmer 301; AGK (corr.) 79; Cunetio 2392, 2393;
Picture: Sebastian Sondermann - Ancient Numismatics stock. 
ID: PAnt-71 

with permission of gallicempire.com
July 2009