NGC $1 1986 Silver Eagle Struck Thru 3M Sanding Disc MS69

NGC 1986 silver eagle struck through a 3M emory disc. The coin has a rough, granular pattern to the strike through, which is distinctive for the struck through 3M emory discs. 

These are quite scarce, with probably 8-10 known for the years in which these strike thrus occurred (1986 and 1987.) 

MS69 with some multi-colored toning. A pleasing, original appearance, with bright white surface elsewhere beyond the toning.