The Aeroplane Spotter Weekly, Vol 1 Jan-June 1941 Collection Northrop which would be rotated to

which would be rotated to align with the compass card floating in the reservoir below it

(i) The ability to disconnect the magnetic slaving signals of the C2 Fluxvalve

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This is an early automobile altimeter that appears to be from the late 1920s-1930s based upon photos of luxury automobile dashboards of that era

A simple but very useful instrument at the time

The Aeroplane Spotter Weekly, Vol 1 Jan-June 1941 Collection Northrop which would be rotated toThis is a complete unbound collection of The Aeroplane Spotter, Volume 1, containing all 26 weekly publications from January though June 1941, a total of 244 pages, plus an article index to the volume. The Aeroplane Spotter was a British weekly newsletter full of information regarding military aircraft of the RAF, Luftwaffe, US Army Air Corps and others. Each weekly edition is printed on newsprint paper and obviously shows its age. It is full of