AFAIK its even a felony to make something like the $2 bill - and not only because of the bad taste. Its simple forgery, and its not taken lightly by the FBI I heard. Similar with the silver dollar, at the least it could be seen as "alteration", which is also illegal. Well, at least it looks like a genuine silver dollar, but even that can be a fake. I have seen Canadian Maple Leaf coins on offer on Amazon - which were made in China. They looked completly real, but were not made from silver nor were real Dollars.
And this offset printing on it is really lowest quality, I cant imagine the US mint would produce something like that.
Have you tried weighing it yet? And measuring? Also it has milk stains, which is not typical for silver dollars, I think. A cheap silver coating?
Oh well, at least you can keep it as a curiosity. :)