These are two training mouthpieces used by Muhammad Ali during sessions at his training camp in Deer Lake, Pennsylvania in the mid 1970s. From the collection of his longtime assistant trainer Wali Muhammad (1971-1981), these artifacts are white rubber and stamped by Everlast. Both mouthpieces show wear. Equipment used by Muhammad Ali is very scarce, especially with this kind of provenance. LOA from the daughter of Wali Muhammad. LOA form Craig Hamilton of JO Sports, Inc.