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Heritage Auctions, Sports Collectibles Auction 7041, Dallas Texas, PDF, Detroit Tigers
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1969 TOPPS SUPER #51 JERRY KOOSMAN METS PSA 10
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1969 Topps Super #51 Jerry Koosman Mets SGC 8 - NM/MT 26C 00 0144
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Trading Card Lots, Sports Trading Cards, Sporting Goods - PicClick AU
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Hunt Auctions, LLC
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Hunt Auctions, LLC
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Why PSA and PSA/DNA?
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1970 Topps Baseball Checklist, Set Info, Key Cards, Buying Guide
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Trading Card Lots, Sports Trading Cards, Sporting Goods - PicClick AU
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Jerry Koosman Baseball 1969 Season Sports Trading Cards & Accessories for sale
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Hunt Auctions, LLC
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Tee-Ball All-Star – SABR's Baseball Cards Research Committee
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PSA Magazine: 2023 April #016 by PSA Magazine - Issuu
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1969 Topps Super Jerry Koosman #51 PSA Gem Mint 10. Baseball, Lot #42021