Signed Mackey Mantle Card

Its a signed Mackey Mantle card. Its not graded or been authenticated. However I believe its a real card. I've researched a lot on his signatures and the origin of this card which was, he said, his favorite picture. Originally a magazine cover. The ink was not printed into the card so its been signed in person. Its amazing. Also, the card is in emaculate condition. The scratches are the case around another case in which its held.