Muhammad Ali Autographed Memorabilia. Check out Muhammad Ali Autographed First Day Cover - PSA/DNA. This First Day Cover that has been personally hand signed by Muhammad Ali. This First Day Cover is approximately 3.5x6.5. It has been authenticated by PSA/DNA and comes encapsulated in their tamper-proof holder. PSA/DNA is the leading third-party authenticator in the autograph industry. This product is the perfect collectible for any sports fan or memorabilia collector. Commemorate the great career of Muhammad Ali with this autographed item, or check out other souvenirs at SportsCollectibles.com for more products autographed by Muhammad Ali. When it comes to Sports Memorabilia, SportsCollectibles.com offers a wide selection of Muhammad Ali autographed memorabilia. Product will ship in 1-3 business days with free shipping on orders over $200. Buy with confidence as this is an authenticated Muhammad Ali autograph.