Stain on 2014 gold Kennedy half dollar likely from oil on die or blank not a frosting error

Readers Ask column from the Sept. 22, 2014, issue of Coin World
By , Coin World
Published : 09/05/14
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I spoke with you at the American Numismatic Association World’s Fair of Money about my gold Kennedy half dollar that I thought was an error.

I walked around and showed a lot of people at the show; most of them think it’s a frosting error caused by the laser they use to give certain areas of the coin a frosted look.

Somehow the laser got onto the field of the coin. I have attached two pictures that the folks at Dino-Lite took for me.

Some people at the show also think it could of been some type of foreign object that got onto the blank while it was being stamped.

Do I possibly have something rare and valuable here or is this common?

Pat Scoleri, via email

Upon the receipt of the images accompanying your Aug. 13 email request, Coin World forwarded the images and text of the inquiry to the United States Mint’s Office of Corporate Communications.

The inquiry and attached images were subsequently forwarded to the production and technical staff at the West Point Mint for investigation, according to Adam Stump, deputy director of the United States Mint’s Office of Corporate Communications.

Stump replied to Coin World on Aug. 15 with an explanation:

“We have checked out dies for first and last struck coins for the 2014 50th Anniversary Kennedy Half-Dollar Gold Proof Coin.

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