The circle smear is below the surface (only 1 side).

Two examples as seen; illustrating one side, each.

I don't think these were ever on the tables (no rack marks, anyway... and look about unused).

I had about 17 examples that I got from a woman in Henderson... and if I remember correctly (it's been about 12-13 years) all were virtually the same; circle smear on one side.

These are my last two examples.

Make offer if interested (a 2-chip lot).

Happy Holidays...