Ken Griffey Jr. Autographed 1989 Final Series Rookies Superstars Rookie Card Seattle Mariners Auto Grade Gem Mint 10 Beckett BAS mystery This is a 1988 Donruss

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Ken Griffey Jr. Autographed 1989 Final Series Rookies Superstars Rookie Card Seattle Mariners Auto Grade Gem Mint 10 Beckett BAS mystery This is a 1988 DonrussThis is a 1989 Final Series Rookies Superstars Rookie Card that has been hand signed by Ken Griffey Jr. The condition of the signature was graded a Gem Mint 10 by Beckett Authentication Services (BAS). It has been certified authentic by Beckett Authentication (BAS) and comes encapsulated in their tamper proof holder.