What year is 1911 Thompson Auto Ordnance Seril EO5438?

The 1911 Thompson Auto Ordnance Serial EO5438 refers to a Thompson submachine gun produced by the Auto-Ordnance Corporation, which was established in the early 20th century. The "1911" designation indicates that it is based on the M1911 pistol design, which was adopted by the U.S. military in 1911. However, without specific historical records, it's difficult to determine the exact year of manufacture for that particular serial number, as the production of Thompson submachine guns spanned several decades, especially during and after World War I and World War II.