50th Signal Unit Crest "Key To Command" (each) expertinf 4th Air Defense Artillery Unit

4th Air Defense Artillery Unit Crest "Audacia" (each)

Navy Collar Device E7 Chief Petty Officer

Infantry & U

United States Army Drill Sergeant Challenge Coin

50th Signal Unit Crest "Key To Command" (each) expertinf 4th Air Defense Artillery Unit50th Signal Unit Crest "Key To Command" (each). A distinctive unit insignia (DUI) is a metallic heraldic badge or device worn by soldiers in the United States Army. The DUI design is derived from the coat of arms authorized for a unit. DUIs may also be called "distinctive insignia" (DI) or, imprecisely, a "crest" or a "unit crest" by soldiers or collectors. The U. S. Army Institute of Heraldry is responsible for the design, development and