Radiological Survey Meter (Geiger Counter) CDV-715 Model 1A F9F Panther The knob rotates the barometric

The knob rotates the barometric pressure adjustment

WWII-era US Navy Douglas SBC Dive Bombers as well as early 'birdcage' versions of the Vought F4U-1 Corsair Fighter

The temp reading is inaccurate

shows evidence of this clock having been through NAS (Naval Air Station) Norfolk (VA)

This is an original WWII-era Course and Speed Calculator Mk II as used by aviators of the British RAF in its wooden case

Radiological Survey Meter (Geiger Counter) CDV-715 Model 1A F9F Panther The knob rotates the barometricHere is an authentic Geiger Counter as used by the US Civil Defense, plus original instructions. Operational condition accuracy is unknown. With a D cell battery installed, the meter needle activates when switched on.