Gallienus, AE antoninianus. Rome, joint reign. 257-258 AD.

IMP CP LIC GALLIENVS AVG, radiate, draped bust right.
PIETAS AVGG, Valerian and Gallienus standing facing each
other, sacrificing at altar between them.

RIC V-1 (J) Rome 446

With kind permission of Numismatik Lanz, Auction 2004.