This top shelf example if both perfectly preserved, uncleaned, and struck from a thick planchette for outstanding detail, but this was also inspected by Don Bible back in 2003 when I purchased a large collection of disks.  Included in the purchase is a copy of the list, signed by Don Bible denoting that the disk is real, plus my original certificate of authenticity.  This piece comes complete with a period carry-chain.  You cannot upgrade this example.