Sextant, Aircraft Periscopic, MS28011-5 Vickers The dial markings are clear

The dial markings are clear and the glass and cases are intact

Time is set by pulling out and turning the red knob (lower left)

such as the P-38 Lightning

Typically mounted under the wing or fuselage of the aircraft

This is a vintage Cold-War-era Outboard Wing Tank Fuel Quantity Indicator

Sextant, Aircraft Periscopic, MS28011-5 Vickers The dial markings are clearThis is a Cold War era Periscopic Aircraft Sextant and Case, as used by navigators in aircraft of the US Air Force such as B 36 Peacemaker, B 47 Stratojet, B 50 Superfortress, B 52 Stratofortress, and of the US Navy such as the P2V Neptune and others. The periscopic sextant was used by navigators to fix and track the position of the aircraft in flight, usually by nighttime celestial (star) readings, but also by the position of the sun in daylight. The