By SGC and comes with their letter of authenticity - the certification number is AA1050 and can be checked on their website. Please check our other boxing memorabilia! The item "MUHAMMAD ALI signed autographed photo framed (SGC LOA) Cassius Clay" is in sale since Thursday, August 27, 2020. This item is in the category "Sports Memorabilia\Boxing Memorabilia\Autographs". The seller is "london_collectibles_limited" and is located in Chessington.This item can be shipped worldwide.