Back in late 1990 Bill Borland approached Jim Blanchard about making commemorative chips for closed casinos.
Prototypes were made, including the El Rancho's in the top row.
Ultimately, Borland purchased the rights to the NEVADA mold a few months later and the actual chips were made on that mold.
These 7 chips I have available are from Jim Blanchard's personal collection.

Some time later, forgeries/reproductions of the Borland commemoratives appeared. The ones shown on the 2nd, 3rd and 4th lines of the pic were made by Bill Eichorn (an 'associate' of Dave Whalen & Rich Burgel)

The chips on the last two lines are the factory samples of various Borland personal advertising chips.

If anyone is interested in any of all of these, email me with offers.
The value is in the top row.
.