I am lucky to have all of these in my collection.

$10 MGM Tyson chip. From what I understand, only two of these exist. Both sides are the same.

$500 Holyfield/Tyson II chip - #008.

$25 Atlantic City Caesars Palace notched sample chip. I have two - one has a "000" serial #.

$25 chip signed by Lennox Lewis.

Oversized Davey Pearl chip.

Sam's Town Lennox Lewis set. All chips are serial #20.

Paulson boxing chip samples:

$100 Mahoney's Tyson chip - 1 of 15.

Tyson chip from a Russian casino: