You are bidding on an original hard-bound edition of the "Gunner's Information File" that was issued to the turret gunners in the B-17 and B-24 (and maybe other) bombers during WW II, dated May 1944, Air Forces Manual Number 20, over 300p. It has a whole chapter on the Browning .50 caliber machine gun, as well as shorter chapters on the .35 caliber gun and the .45 service pistol. Did you ever want to know how to field-strip a Browning .50 caliber machine gun? It is T are details on the Martin Upper turret (T-19), the Sperry Ball (T-31), the Sperry Retractable Ball (T-45), the Sperry Upper (T-49) the Consolidated Tail (T-63), the Emerson Nose (T-75), the Bendix Chin (T-86), and the Bendix Upper (T-97), as well as the Bell Adapter (T-109). It shows how to get in and out of the turrets, how to align the guns and sights, how to maintain and check the gun and turret. T is information on how to anticipate fighter tactics, when to fire and when not to fire.THIS MANUAL IS UNUSUAL - IT HAS A COMPLETE COPY OF THE CHAPTER ON AIRCRAFT RECOGNITION AND A FULL MANUAL INDEX. BOTH OF THESE ARE USUALLY MISSING IN THESE MANUALS. IN ADDITION, IT HAS ONE SECTION AT THE FRONT THAT I HAVE NEVER SEEN BEFORE, CALLED "GUNNERY IN THE B-29: INSTRUCTIONS FOR THE REMOTE-CONTROL TURRET SYSTEM" - DATED JULY 1944, MAYBE 55 PAGES. THIS DESCRIBES A SYSTEM FOR CONTROLLING ALL OF THE GUNS FROM ONE, CENTRAL LOCATION, ENTIRELY BY REMOTE CONTROL. T IS A SINGLE SIGHT THAT IS USED FOR ALL THE GUNS. A MOST REMARKABLE SYSTEM. This manual is in good condition, all pages are present and in good condition. The edges of many of the pages are worn. T are some minor tears around the edges. The pages are brittle. The colors are still bright. The first two pages of the Remote Control Turret are quite worn and are falling apart. A few of the pages are trying to fall out of the binder. Buyer to pay actual shipping charges. PayPal preferred. Check or money order accepted.