This official National League Bill White  baseball is signed by two of baseball's greatest players, Mickey Mantle and Sandy Koufax. The ball is an original and has not been authenticated. It is a must-have for any collector or fan of baseball, especially those who appreciate the legends that Mantle and Koufax were. The ball is in good condition and has been well-maintained. It is a great addition to any collection and a piece of history that will be cherished for generations. This is from a long time owner!  COA could not be found.  Ball also is a limited edition as it is hand numbered #33/1963! Selling ball as is.  Ty for looking