Compass, Magnetic Direct Reading, US Navy Mark IX with Plaque Northrop The temp reading is inaccurate

The temp reading is inaccurate

often the home airfield

with a few color pages for badges and insignia

as documented in the F-86F Maintenance Manual dated Sept 1954 (see photo of page from this manual showing the instrument and the AN #)

The fluid is low by about a teaspoon

Compass, Magnetic Direct Reading, US Navy Mark IX with Plaque Northrop The temp reading is inaccurateHere is an example of the WWII era US Navy Aircraft Direct Reading Magnetic Compass Mark IX, as used in the seaplanes PBY Catalina and PBM Mariner Patrol Bombers. The compass was illuminated electrically via bulb mounted in a small compartment over the compass itself. Inside the same compartment is access to the direction compensating screws, used to calibrate the compass. This example is in very good condition for its age. The fluid is intact but not