This is a 1988 ProCards Rookie Card that has been hand signed by Ken Griffey Jr. The condition of the signature was graded a Gem Mint 10 by Beckett
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Ken Griffey Jr. Autographed 1988 ProCards Rookie Card Vermont Mariners Auto Grade Gem Mint 10 Vintage Signature Beckett BAS #14391681
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1988 Procards Vermont Mariners Ken Griffey Jr. RC Rookie HOF PSA 8 (OC)
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1988 Vermont Mariners ProCards #NNO Ken Griffey Jr. Baseball PSA 8 NM-MT (OC)
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Ken Griffey Jr. Pre Rookie 1988 Vermont Mariners Team Signed Game Baseball Jsa Auction
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When Griffey Jr played for the Vermont Mariners
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Ken Griffey Jr. Signed 1988 Vermont Mariners ProCards #NNO (BGS)
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1987 - 1989 Ken Griffey, Jr. Rookie Card Collection (6) - Both as a, Lot #41054
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1988 Ken Griffey Jr Minor League Rookie Card Vermont Seattle Mariners Limited
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Auction Prices Realized Minor League Cards 1988 Procards Ken Griffey Jr. VERMONT MARINERS
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Memories of Ken Griffey Jr.'s Summer in Vermont
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Bringing Up Junior - Sports Illustrated Vault
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Seattle Mariners all-time team: Ichiro, Ken Griffey Jr., Edgar Martinez headline loaded lineup
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Ken Griffey Jr. Autographed 1989 Score Traded Rookie Card #100T Seattl — RSA
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Ken Griffey Jr. - Wikipedia