Rare Air Gunner World War 2 Pins top Collectible Air Force/ Military Badge AG Wing-Ops (Operative )Collector Pin from Pilot's Estate

I have some assorted pins from a pilot during WW2. The back of the sterling wing has a screw off top ( I have the screw there as it may be mended ). I have put a dime beside them to show their size. Very small, and many of these were tragically thrown out. As found, and precious!.