Don't know much about this item. It was tested Sterling. The hallmark 'F' I am unfamiliar with this

This vintage sterling silver US Army Airmen Pilot Wings Badge Pin is an original piece of militaria from the United States. The pin features a design of wings, symbolizing the role of pilots in the army during World War II. With a classic and timeless appeal, this collectible item is a unique piece of history that would make a great addition to any military memorabilia collection. Ideal for those interested in WW II artifacts and military history, this badge pin is a special find for collectors.