it looks like a Roman coin but i would say a fake.Theres lots of them about.The shape is all wrong to start with,its too perfect.that is only my opinion
I agree with Simon, it looks too good.
A few years ago I was at Colchester museum in Essex, and ex-Rolling Stone Bill Wyman opened the event.
He was telling us that he was detecting on farmland he owns in France, and found a lovely silver coin, and got quite excited over it.
That was until someone said they were given away with petrol at the local garage
Untill we know where it was found i stick to what i think.We all know there was no Romans in the States so either is a wind up or one bought in a souvenier shop or something like that.You could well be right achaios but im not convinced