Original WWII U.S. Navy BU. Aero Mk.IIIB Navigational Drafting Protractor by Bruning-Wallace in Case Airsoft Guns though it is very light

though it is very light

This marking indicates the dagger was made by SS contractor "1053" in 1938

it was decided to give the gas regulator key an additional function: it would be turned into a wrench to unscrew the tiny locating stud inside the clamp ring

and the blade is currently not very sharp

380th Bomb Group that was known as the "The Flying Circus

Original WWII U.S. Navy BU. Aero Mk.IIIB Navigational Drafting Protractor by Bruning-Wallace in Case Airsoft Guns though it is very lightOriginal Item: Only One Available. Genuine rare WWII Bruning Wallace Aircraft Mk. IIIB Navigational Drafting Protractor. The instrument is identical to the AN 5750 Protractor used by the U. S. Army Air Forces, but in this case was ordered by the U. S. Navy. The organizations that were largely responsible for procurement in the 1940s were designated Bureaus, each commanded by a Rear Admiral. These Bureaus included: Aeronautics, Engineering, Navigation,