This product is a 1" Hilborn Hamburger uniform button from the pre-1941 era of the US Coast Guard. It is an original militaria collectible from the United States, specifically related to World War I. This button holds historical significance as a piece of military uniforms worn during that time period, making it a sought-after item for collectors interested in WWI memorabilia. Its unique design and connection to the Coast Guard add a specific touch to any militaria collection focused on US military history.