Valerian I Antoninianus. Milan, 257-259 AD.

Obv: IMP VALERIANVS P AVG, radiate, draped & cuirassed bust right
Rev: SALVS AVGG, Salus standing right, feeding serpent in arms. 

RIC V-I 253 Lyons, rated scarce.

Used with permission of TimeLine Originals (www.time-lines.co.uk), June 2009