Ken Griffey Jr. & Ken Griffey Sr. Autographed Official MLB Baseball Seattle Mariners "Back To Back HR 9/14/90" Tristar Holo & Beckett BAS Witness Stock #212465

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212465
This is an Official MLB Baseball that has been hand signed by Ken Griffey Jr. & Ken Griffey Sr. This item was inscribed "Back To Back HR 9/14/90" by Ken Griffey Sr. 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. This item has also been certified authentic by TriStar and comes with their tamper-proof sticker and matching certificate of authenticity.