Single sheet published by Bell Aircraft Corp. detailing the Bell P-39 prop-powered fighter aircraft. U. S. Air Force. First flight during WWII. Over 10,000 built. Printed on one side of the sheet. Shows two photographs, a 14-line description and plan views with dimensions. From the Estate of an aviation engineer. Undated - early, mid-1950s. Tiny pin-holes at each corner. Small residual tape to back panel. A little creasing to one photo. Otherwise clean and unmarked.