Muhammad Ali Autographed Memorabilia. Muhammad Ali Autographed Boxing Illustated Magazine Vintage - Beckett Certified. This is a Boxing Illustated Magazine that has been hand signed by Muhammad Ali. This is a vintage signature. Please note: the cover of the magazine is not attached to the rest of the magazine. It has been certified authentic by Beckett Authentication (BAS) and comes with their sticker and matching full page certificate of authenticity. This product makes for an excellent collectible for a fan or memorabilia collector. A bold, prisitine Muhammad Ali signature. SportsCollectibles.com offers the best prices for Muhammad Ali Autographed Newspapers, Magazines, and Programs. Your order Backed by Sports Collectibles 100% Money Back Guarantee. and is Backed by Sports Collectibles 100% Money Back Guarantee. Shop authentic signed sports memorabilia at SportsCollectibles.com.