Hi! Daniel.
At fist impression the graph seems good to me. The only issue is that is an easy signature to fake. Do you trust the source?
I will let other members to give their opinion also. I'm sending you my Robin autograph if you wish to compare.
Best wishes
Oscar
Hi Oscar, thank you so much for your reply I really appreciate it. The source is Hollywood memorabilia, I have not bought anything from them before. But have heard good and bad things about them. Let's hear what others have to say.