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    Undated 'Silver' Eagle
    Struck on a 3M Sanding Disc

    Undated Silver Eagle -- Reverse Image on a Sand Paper Disc -- NGC. The legends of this piece state it is "1 OZ. FINE SILVER." However, the present mint error contains no silver at all. An emery (or sanding) disc is wafer-thin, round, granular, and backed by an adhesive. It is typically affixed to a buffing wheel, and was used at the Mint to prepare dies. A sanding disc found its way within a series of silver eagle planchets, and was fed between silver eagle dies, along with a silver eagle planchet. The silver planchet (not included) blocked the obverse die, thus the front of this dark gray piece has a reverse die impression. The other side shows an incused impression of the reverse.

    Learn more at the Newman Numismatic Portal at Washington University in St. Louis.

    View Certification Details from NGC

    Auction Info

    Auction Dates
    February, 2020
    20th-23rd Thursday-Sunday
    Bids + Registered Phone Bidders: 8
    Lot Tracking Activity: N/A
    Page Views: 274

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