You are bidding on an US Army 308th Coast Artillery (Barrage Balloon) Distinctive Unit Insignia (DUI) Clutch Back. DUI is marked: 5D. This came from an old collection of over 4, 000 DUIs that I recently purchased from a collector's estate. I will be listing the vintage ones over the next several weeks so please check my other listings. I combine shipping on multiple purchases.If you like woodwork fresh military items visit my e-bay store and save me as one of your favorite sellers.... I operate A Military Collectibles Shop in Webb City, MO where I buy directly from the public and sell here on E-bay. When you bid on my listings you are supporting a Veteran Owned and Operated Small Business.