It looks real to me, and is indeed a base-silver antoninianus of Victorinus. Listed in Sear as number 11179. Reverse type is SALVS AVG, the goddess Salus (health) feeding a snake she's holding in her arms.
Sear lists it at $25 in VF. This one might grade higher (I'd cal it gVF), but the price goes down again because it's slightly off-centre.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis