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with a lovely half-octagonal brass barrel
as they are definitely wool
This came out of our big gun buy over over 200 units that had been in storage for nearly 100 years
There is a size label indicating 7 1/8
against the Danes during the Schleswig-Holstein uprising in 1848-49-50
Original U.S. WWII Air Corps Type B-5 Drift Meter NATION with a lovely half-octagonal brassOriginal Item. Only One Available. This aircraft Drift Meter, type B 5, was used in several US Army Air Force bomber and transport aircraft, including the B 17 and B 24. The B 5 drift meter is used to measure the angle between the heading of the aircraft and its actual path over the ground, thus used to correct the course of the aircraft. The instrument's viewing port projects from the side of the aircraft. When viewing the ground through the eyepiece
