In 1904, the Warners founded the Pittsburgh-based Duquesne Amusement & Supply Company, to distribute films. In 1912, Harry Warner hired an auditor named Paul Ashley Chase. By the time of World War I they had begun producing films. In 1918 they opened Warner Bros. studio on Sunset Boulevard in Hollywood. Sam and Jack produced the pictures, while Harry and Albert, along with their auditor and now controller Chase, handled finance and distribution in New York City. During World War I their first nationally syndicated film, My Four Years in Germany, based on a popular book by former ambassador James W. Gerard, was released. On April 4, 1923, with help from a money loaned to Harry by his banker Motley Flint, they formally incorporated as Warner Brothers Pictures, Incorporated. (As late as the 1960s, Warner Bros. claimed 1905 as its founding date.)