Was wondering if anyone could take a lookat this 1960s or 1950s New York Yankees Team Baseball my neighbor has.  I think he has a letter from where his father received the signatures back then.  Anyways I took close up of he Mantle signature.   Does it look authentic?  Thoughts on if I should tell him to get ball authenticated. I did not see Maris on the ball anywhere.  I see  Ed Ford and Yogi Berra..Thanks for any help.…