James,
The chip was bought from Jerry Wall about four or five years ago at one of the Arizona Charlies shows. My friend paid Jerry $2,0000. At the time Jerry claimed it was the only one. Since no one has ever seen another besides the 5 you say you have.This would make a total of 6 chips known. I am sure you were joking that the value of the chip is $600.00. Just like I was joking that I had $750.00 in it. If there are truely only the 6 pieces I place the value at $2,000 or over. Too bad you found the 5 pieces the chip would be worth much more. Best, Jim