US Army Air Force Fighter Gunnery, 1st Edition, Training Manual, June 1944 A-35 Vengeance Here is an original WWII-era

Here is an original WWII-era Recognition Poster for the British Royal Air Force Avro Lancaster Heavy Bomber as published by the US Navy Dec 1942

and functions as it should

and our educated guess is that this is the altitude of the threat and its air speed relative to the interceptor

We believe it to be a pre-WWII model for civil aircraft

one for Autopilot Release and the other for Hydraulic Panel Lights

US Army Air Force Fighter Gunnery, 1st Edition, Training Manual, June 1944 A-35 Vengeance Here is an original WWII-eraThis is an original Fighter Gunnery Training Manual as used in aerial fighter combat training of pilots of the US Army Air Force during WWII. Its 115 pages cover all that is necessary to know by fighter pilots for air to air combat. It is in good condition for its age. The pages are intact. The cover has become detached from its staples, but it is otherwise reasonable condition. Measures 8. 5 x 11 in and about 1 2 in thick.