I have the only one I've ever seen until now.
It is believed to be a movie prop. I also have a $25 but have seen several others of them.
Michael Knapp thinks it was made for the Godfather III. I think it was made for a George Raft movie.
If you peel the inlay, you will find Casino Samarina, Quito, Equador.
Someone bought un-delivered chips from Ewing and re-stickered them.
I got my $1,000 from a cocktail waitress that got it for a tip back in the middle 1990's. She was upset it was worthless.