Chris Brown sent me these photos of jump wings with a screw-back. Something I had never come across. He tells me these were worn on helmet liners by troopers on guard duty, parades, and ceremonial events. They are full size, but with one threaded post. As you can see, these aren’t modified; they were produced this way for this soecific purpose. He says he acquired several like this from an estate in Vermont. They were accompanied by a sterling “GP” marked wing. They are very scarce and it was also the first time Chris had seen any in his 50 years of collecting.