This is an authentic Post Vietnam War USAF US Second 2nd Air Force Master Crew Patch. 4 round. This was part of my fathers military patch collection that he earned in the USAF. It is a great addition to any militaria collection and perfect for those interested in the Vietnam War era. The patch is original and has not been reproduced. Never placed on uniform. The design features the US Second Air Force emblem and is in excellent condition. This patch is a must-have for any collector or enthusiast of military history.