I've obtained several in-person autographs from both men over the past 25 years, and these look to be bang-on in terms of authenticity. Tyson went through a phase very late in his career when he routinely dated everything he signed, and it has carried over to this day. I would venture to guess your Ali glove was signed sometime between 1990-95. Post '95, as his difficulties with Parkinson's increased, Ali's autograph got much less legible and today he no longer signs. Nice examples!
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