This tournament chip from Harrahs Las Vegas seems to be missing from the set marked Harrahs Poker. It is white, H&C mold, marked 100, and same both sides. There are others from this set that are listed (25 is E9429) but the white chip seems to have been missed. Alex also shows it in TheChipGuide as unlisted.

I just noticed there is an E9430 that is listed as a 25 white. It could be this entry should be the 100 white as I don't believe there would have been two colors of the 25 in the year 2000 tournament set.