Original WW2 US Army Air Corps BALLOON Sterling Pilot 3 Wings Pin Back. The item "Original WW2 US Army Air Corps USAAF BALLOON Sterling 3 Pilot Wings Pin Back" is in sale since Wednesday, May 30, 2018. This item is in the category "Collectibles\Militaria\WW I (1914-18)\Original Period Items\United States\Medals, Pins & Ribbons". The seller is "dark-horse-antiques" and is located in Huntington, New York. This item can be shipped to United States.