Hey Rob. The 4th Edition of "The Official U.S. Casino Chip Price Guide" values it as the following: Rarity = R-10. Average condition = $50, S-U condition = $75 and New Condition = $100.

The Guide also notes the following: "These were ordered for Gardena, California, but may have possibly been used in Las Vegas. Oddly enough, a $20 piece was found in the Western Club in Lovelock, Nevada. Even as original CA chips these are great chips."