I'm tentatively ID'ing this as SEAR 6256: S. Severus obverse, reverse showing horseback rider proceding to the right with arm raised under "Adventvs Felicissimo" (a very happy arrival). More details on that legend here: http://augustuscoins.com/ed/PROFECTIO/ADVENTVS.html What really stood out to me is the story of which triumph this apparently illustrates (and how the reverse design just happens to reinforce a story about the emperor's actions). Apparently, Severus had similar coins made for several of his triumphal processions. There's some debate about which victory was number VII, but after he defeated the pretender to the throne Clodius Albinus at the battle of Lugdunum, Emperor Severus reportedly had the body of Albinus laid out to trample under the feet of his horse. After that, he beheaded the corpse and then threw the headless body into a river along with various murdered family members. https://en.wikipedia.org/wiki/Clodius_Albinus One might suppose that Albinus angered the Emperor somewhat.