Michael Kendrick was a Legendary top autograph baseball collector from the late 50's thru the 70's into the 80's. I bought his single signed baseball collection some 33 years ago.  He used to send a letter of request to each player before he mailed out a baseball to be signed.  I have several of these ballplayer's response letters. This one is from HOFer Hall Of Famer George L. Kelly of the N.Y. New York Giants. I ABSOLUTELY GUARANTEE 100% AUTHENTICITY from any recognized third party expert. AS ALWAYS SATISFACTION GUARANTEED.