I have scans of (I think) most of the brass chips on my web site. Brass core chips have always been one of my favorites. You can check out scans of brass cores chips from the following CA & NV casinos:

Crystal Bay Club , Harrah's , Harveys , Hollywood Park , Hyatt Tahoe , John Ascuaga's Nugget , Ramada Reno , Ranch House , Silver Smith , Top of the Vine , Trocadero , Viejas.

Simply go to the link shown and scroll down to the section on "Featured Chip Scans".

Hope this helps.