Armament & Fields of Fire, Luftwaffe Aircraft USAAF Training Manual French Armée de l'Air There are some markings on

There are some markings on the glass denoting the operating limits and orientation of the glass (the white mark

Once past 20

The date is set by depressing the small button just above the winding knob with a narrow tipped tool such as a paperclip

so likely from a US Navy or US Air Force aircraft

Armament & Fields of Fire, Luftwaffe Aircraft USAAF Training Manual French Armée de l'Air There are some markings onHere is an authentic original WWII era training brochure, "Armament & Fields of Fire, German Aircraft", published Dec 1942 by the US Army Air Force. This simple manual lists and illustrates the location of armament of 20 armed aircraft of the German Luftwaffe in service by 1942, and the fields of fire of each gun carried by each aircraft. This information was critical to pilots of US fighter aircraft and aircrew of bomber and transport aircraft as