I could always be wrong, but to me, this looks like a very bad forgery. They arent consistent with anything i have ever seen before, and they all look signed in the same hand.
Just my opinion, but I would not be happy with these. They lack any confidence and look like they were all signing their own names for the first time. Not real in my humble view.
I also have to disagree with Greig...I don't believe these are real. Even if they were, they aren't the best signatures anyway for the cost of an item like this, which is $5K+