[dog breath]

Fishing would be a good bet or maybe a gaming disk of some sort. Perhaps used something like dice or perhaps the game of marbles. Who knows, the folks have gone to the other side who made it and left no instruction book. Many Indian tribes loved to gamble, actually the current ownership of casinos by some tribes seem slightly humorous in that light.

[null and void]

Don’t be silly, it’s clearly an Inuit calendar disc. After careful study, I can read the last day...
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12/21/2012!