Original program for the NABF heavyweight championship bout between Muhammad Ali and Ken Norton on March 31, 1973, at the Sports Arena in San Diego, California, 17 pages, 8.5 x 11, vertically signed and inscribed on the back cover in ballpoint, "To Noel, from, Muhammad Ali, Peace, 1973," with another hand adding a date of March 22, 1973. In very good to fine condition, with general handling wear, and stains to the back cover. Norton's unorthodox fighting style was enough to earn him a controversial split decision and snap Ali's 10-fight win streak; Ali was later revealed to have suffered a broken jaw in the final round. Ali reclaimed his title five months later with an impressive split decision victory of his own. Accompanied by a full letter of authenticity from Beckett Authentication Services.