Postumus AR Antoninianus 3.60 gr, 23.54 mm. Cologne. 259-268 AD. 

Obv: IMP C POSTVMVS PF AVG, radiate, draped and cuirassed bust right.
Rev: VICTORIA AVG, Victory walking left, holding wreath and palm.  

Elmer 132; Addington hoard 71; RIC V-II Lyons 90 var (bust type); 
Sear 1099. RIC lists this coin under Lyons but the bust type of this 
example has definite characteristics of the Cologne mint. 

Courtesy of TimeLine Originals (www.time-lines.co.uk), March, 2011