Original World War I U.S. War Service Shipbuilding badge featuring a steamship motif and U.S. shield top. Issued to civilian workers aiding the crucial wartime emergency fleet and merchant shipbuilding efforts. Stamped with serial number 57033 on the reverse. Fitted with a functional pinback mechanism. Shows honest age-related patina and minor wear. Measures approximately 1.5 inches in diameter. A fantastic historical piece of American homefront and maritime militaria.