This challenge coin represents the 21st Special Operations Squadron Dust Devils, a United States Air Force unit that operated CH-53C and MH-53J helicopters. The design features the squadron’s emblem with the text “Dust Devils” below, surrounded by a border of stars and stripes. This original item is a must-have for collectors of militaria and those interested in the history of special operations aviation. The coin is in excellent condition and has not been modified in any way. It is a great addition to any collection or can be used as a unique gift for a fellow enthusiast. Please refer to the photos for more details on the design and quality of this piece.