This Autographed Warren Giles Onl Baseball has been Personally Signed by Walter Alston, Sandy Koufax, Jackie Robinson, Roy Campanella, Don Drysdale. Also signed by Clem LaBine, Carl Furillo, Roger Craig, Ransom Jackson, Sal Maglie, Rube Walker, Don Newcombe, Jim Gilliam, Ken Lehman, Carl Erskine, Rocky Nelson, Sandy Amoros. **Clubhouse signature include Duke Snider, Pee Wee Reese, Gil Hodges, Charles Neal, Don Zimmer.** of the Brooklyn Dodgers. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.