I'm notan expert but it looks like the special mintage special release I think they call it? Any information is welcome thank you for looking. The item "1964 Kennedy half dollar Rare" is in sale since Monday, July 12, 2021. This item is in the category "Coins & Paper Money\Bullion\Silver\Coins".
The seller is "isco6" and is located in Lovington, New Mexico. This item can be shipped to United States.