Valerian II Antoninianus, Rome mint, 256-259 AD.
 
DIVO CAES VALERIANO, radiate head right.
CONSECRATIO, Altar, lighted, with a small palmette at each top 
corner and four panels on the front.

RIC V-1, 24; Cohen 12
Rated common. 

With kind permission of Numismatik Lanz, Auction 2000