This silver bullion coin was struck from 1 ounce of pure silver. Muhammad Ali, the American boxer, is depicted on the reverse. The mintage is limited - 15,000 pieces. Muhammad Ali (born January 7, 1942 in Louisville, died June 3, 2016 in Phoenix) is an American boxer. Heavyweight champion of the world (1964-1967). He won a gold medal at the XVII Summer Olympics in Rome (defeated Zbigniew Pietrzykowski in the final), later achieved great fame as a professional boxer. He was the first fighter in history to win the all-weight world title three times and successfully defended it nineteen times. He fought 61 fights, won 56 fights (37 of them by knockout). He suffered five defeats. He defeated 21 fighters for the world heavyweight title. Considered one of the best boxers, as well as the most important sportsmen of the 20th century.