Question about a sacagawea dollar coin

Both the SBA and the Sac dollars weigh 8.1 grams for all years. The 7.6 gram weight is odd and is an additional point toward it possibly being struck on a foreign or "orphan" planchet. The planchets were from an outside contractor so there is the possibility that a blank they were making for someone else could have gotten mixed in with the Sac blanks.

The edge picture is out of focus so it isn't really helpful, and there is nothing with the other picture to provide a color comparison I can't really tell what color the coin is. the Sac dollar can take on a slight silvery color as it wears but this coin does not appear to worn enough for that.

 

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