Ken Griffey Jr. & Ken Griffey Sr. Autographed Black Louisville Slugger Pro Stock Baseball Bat Seattle Mariners "Back To Back HR 9/14/90" Beckett BAS Witness Pele The card is sealed in

The card is sealed in a plastic holder

Card #64 - Eric Karros

This is a Magazine Poster that has been hand signed by Clint Mathis

This is a 1959 Topps Card that has been hand signed by Al Barry

Certificate of Authenticity from James Spence Authentication LLC that guarantees the authenticity of the autograph

Ken Griffey Jr. & Ken Griffey Sr. Autographed Black Louisville Slugger Pro Stock Baseball Bat Seattle Mariners "Back To Back HR 9/14/90" Beckett BAS Witness Pele The card is sealed inThis is a Black Louisville Slugger Pro Stock Baseball Bat that has been hand signed by Ken Griffey Jr. and Ken Griffey Sr. This item was inscribed "Back To Back HR 9 14 90." This item has been witnessed and certified authentic by Beckett Authentication (BAS) and comes with their tamper proof witness sticker.