TYPE Roman Empire, Gallienus (253-268 AD), silver antoninianus DESCRIPTION . Obv: Radiate bust of Gallienus to right, legend: IMP CP LIC GALLIENVS AVG Rev: Jupiter naked, cloak on shoulder, holding thunderbolt and scepter; legend: IOVI CONSERVA REFERENCE: RSC 351 GRADING: VF / AVF, soft struck rev., toned, slightly porous ORDER INFO: R2281, $24 Decent early antoninianus of Gallienus, in the mid-3rd century style and of a real silver alloy, as opposed to the later issues (with smaller head) that rather quickly turned into pure bronze, and spelled the demise of the antoninianus - as well as the whole centuries-old Roman monetary system mainly based on the intrinsically valued silver denarius.