I like to find out more about this chip (history/value) - it's a Harrah's $25 Brass chip...

This coin was found from a detached storage shed of the house we moved in 1.5 years ago. Previous owner is 93 years old and left some of their stuff in the storage shed. I found this coin while cleaning up the storage. I try researching on the internet, but only found something coated w/brass inlay. This coin felt a little bit heavy and there are some scratches from the other side which shows more brass color....