What happened here is the die was very overpolished do to having to remove a heavy Die Clash. That's why his neck is missing and we like to this this error the "Floating Neck". Die Clashes happens when there's no Planchet in-between the die and the die strikes itself causing bad damage to the die. They use diamond paste to remove the Die Clash, but sometimes they can't remove all of it do to some of the Clash marks being too deep. Save it as it's collectable and it's a great example. :)
Errers and Varietys.