Gallienus 253-268 AD Antoninianus Gallienus 253-268 AD. Denomination silvered Antoninianus. Obverse; legend: GALLIANUS AVG, radiate head left. Reverse; Lion facing left, bull beneath, CVIP P below, legend: P. M. TR. P.X III. Image courtesy of Marcy's Gallienus website, http://mk.shahrazad.net/gallienus/ March 2011