There is a tight check in the neck(see pics). The head is solid and will not move.
This is one of a small rig of 4 of these recently found in an estate in Maryland. The others are available as well. The item "Mason Premier Grade Black Duck Decoy with Rig Mark" is in sale since Monday, May 13, 2019.This item is in the category "Sporting Goods\Hunting\Vintage Hunting\Duck Decoys". The seller is "luck99" and is located in Dunkirk, Maryland. This item can be shipped to United States.