Perhaps a promo chip issued for the groundbreaking of the proposed Chaparral Casino which in the Bally article, appears to have been started in 1984 (by United Coin Machine Co.):

https://en.wikipedia.org/wiki/Bally_Technologies

Also see the list of failed Las Vegas Casinos:

https://en.wikipedia.org/wiki/List_of_Las_Vegas_casinos_that_never_opened

Under World Trade Center, which purchased the Chaparral property. Humpf! A lotta good that did 'em.