Postumus Antoninianus, Lyons mint.

Obv: IMP C POSTVMVS P F AVG, radiate, draped and cuirassed bust right. 
Rev: PAX AVG, Pax standing left, holding olive branch 
and sceptre.

RIC 78; Sear 5 10966

Courtesy of TimeLine Originals (www.time-lines.co.uk), Apr. 2010 

Note: One of the differentiating characteristics of 
seemingly identical coins struck in both Lyons and 
Cologne is the hairline on the bust of Postumus.
*Lyons*: Straight hair above the brow and combed back
at the temples. Smile often more pronounced.
*Cologne*: Curly hair above the brow and covering the 
temples.