Michael, if you ever actually see in your hand a grid & a smooth inlay chip. There is "ZERO" chance of error.

They both have a blue "grid" base. but....

In the common "grid" chip, the white inlay is incorporated to the grid base, so you do not loose and cannot feel where the base (blue) AND THE WHITE inlay meet. Is a single body.The pattern of the grid is in no way interrupted in its transition from blue to white.

The "smooth" inlay, also has a grid "blue" base, but the white is a different material that appears like a thick paper or thick white film over or superimposed to the blue grid base and you can clearly see the border or separation of colors, or grid vs film. Here the white material is clearly "over" and not integrated to the base, and which gives you the impression that it could be detached from the grid below.

In your hands you can see the great difference and easy to understand. But, I think these close captures of the edge of the blue grid/white color in both types makes it much easier to understand than anything I can tell you.

**Now, that difference is what has been described in the catalogs & Chipguide, I do not think many people are confused by it. The thing is that this two types have only been described in the chips that have "Las Vegas, NV" in the inlay & never in the chips that have "Las Vegas" in the inlay, like this particular chip!

Anyway, thanks for your input!!