Hello! I was in England earlier this year and stumbled into an antique store. I don't collect ancient coins at all but there were a couple there that interested me. Among them I picked up this bronze coin from a bin of random Roman coins. When I got back to the US I tried identifying it but I couldn't find anything describing the one I had. I'm pretty sure the emperor is Gallienus but other than that I'm not sure exactly what I have here. I'm wondering if anyone here would have some more info + tips on identifying Roman coinage?

