It's authenticated by Ryan's first signing agent in Makita Sports. It consists of a Mikita Sports tamperproof numbered hologram on the jersey itself
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Lot Detail - 6/27/2009 Ryan Braun Milwaukee Brewers (Cerveceros) Game-Used & Autographed Alternate Jersey (MLB Hologram) (JSA)
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Ryan Braun Cards, Rookie Cards, Autographed Memorabilia Buying Guide
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Ryan Braun Cards, Rookie Cards, Autographed Memorabilia Buying Guide