1964 Kennedy Half Dollar Never Seen Before Error/Defect? Need Help Please

to the CCF!

thank you what should I do with this coin?

to the CCF staining doesn't add any value to a coin. This looks like it's just a bullion coin.

To CCF! Just staining from environmental damage. It is silver still, so it's a keeper.

A Different View, Where are My Manners, Welcome to the Forum,

I see the Kennedy 1964 Halve has Been Heated or Near Burnt, I also see the Concentrate Circle Formation on the Obverse, Around The Perimeter of Mr Kennedy's Face.

I see what May be A " Goldish " Hue along the Reverse's Outer Perimeter, Suggesting The Coin Shown has been Exposed to a Heat Source and That Heat source was applied to the " Imprinted Blackened or Necrotic Rounded Object, " which left the Mark or Stain, upon The Obverse, Just My Opinion, Thank You for Sharing, Mike....... ( I too would like to know the results of a Bath, I do NOT think it will come off........ ).