Hello and welcome to the site.
The guideline here is posting photos of both sides and giving the diameter and weight (if available).
Which means we still need the diameter and the photo of the other side to be able to point an exact identification. And a better photo of the head side, if possible.
That said, let's go to what we have here: An emperor with a radiate crown (common in 3rd century romans), and a name that ends on …us.
Probus was the first one that came to head but there are others. And I can't go further than that without the rest of the data you still need to give us.
