Seattle Mariners Ken Griffey Jr. Autographed White Authentic Mitchell & Ness 1989 Authentic Cooperstown Collection Jersey Size L Beckett BAS Witness Stock #212477

This is a White Authentic Mitchell & Ness Seattle Mariners 1989 Authentic Cooperstown Collection Jersey that has been hand signed by Ken Griffey Jr. This jersey is Size L. This item has been witnessed and certified authentic by Beckett Authentication (BAS) and comes with their tamper-proof witness sticker. Beckett Authentication has recently changed their physical certificate card policy where they no longer match their tamper-proof sticker with a physical certificate. A certificate can be printed on Beckett's website for the matching authentication number.