Prior to this recent discovery, only 4 examples of this chip were known.  This $25 is the only known chip recorded from Khoury's El Rancho Rio, which was open for a very short time only between 1949/50 on Hwy 91, Las Vegas.

96 chips were found, presumably being the balance of the original box.  Of these, only 31 have visible hotstamps so those will be the only ones available.  They all have some very slight wear only - the scan below is a representative example - there is nothing really to choose between these 31.  Subsequently the 65 examples without foil, plus 11 good ones, were donated to Nevada Historical Society, leaving just 20 of these in circulation.