Manufactured in the early 1940's, these BB machine guns were used during WWII for aerial gunnery training. The manufacturer, model, and serial number are marked on a small rectangular plaque affixed to the left side of gun. Air supply and battery not included. Mechanically untested. Fair, with heavy areas of corrosion throughout (primarily on left side). Includes a wooden crate and U.S. Air Force inspection tag. Consecutively numbered to next lot.