In 1999, the Sky City Casino in Acoma, New Mexico issued these chips. It didn't take very long for management to find that the $2.50 & $5 chips with the white edges were difficult to ascertain the values from the security cameras. The white edges looked similar to the $1 chips when stacked. This auction is for a $1 chip, a withdrawn white edged $2.50 chip, the replacement $2.50 chip, and the withdrawn white edged $5 chip. The withdrawn chips were only in play for a month or so, and were replaced with colored edged chips. Click on link under pic.