The ChipGuide and Silver State Treasures are two independent websites, we do not share resources.

The ChipGuide is a resource of the Museum of Gaming History - www.themogh.org. By arrangement, the ChipGuide is also available on www.chipguide.com, its former home.

Silver State Treasures has cataloged Nevada chips for quite some time. Nevada chips are relatively new on the ChipGuide and the collection is growing extremely rapidly, sometimes 100's of chip per day.

Does that explain it?