This Autographed 3.5x5.5 HOF Plaque Postcard has been Personally Signed by George Kell of the Detroit Tigers. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services.The authenticity can be verified on Beckett Authentication Services website. Press Pass Collectibles only offers Authentic Autographs by George Kell through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.