Wheel and Flap Position Indicator, AN-5780-2 RAF Typically these were used to

Typically these were used to determine critical factors of flight and navigation while in the air

ONI 202 Italian Naval Vessels (includes ONI 206 of Navies of other European Nations as well as some aircraft pages)

The face is embossed with the marking BUR AERO US NAVY (Bureau of Aeronautics)

The dials on the front and back center rotate

The hose measures ~5 inches long

Wheel and Flap Position Indicator, AN-5780-2 RAF Typically these were used toThese are Type AN 5780 2 Wheel and Flap Position Indicators used in WWII and post WWII aircraft with a nose wheel (vs tail wheel aircraft). According to the US Army Air Force Interchangeability Cross Reference Chart dated February 1945, the AN 5870 2 indicator was used in bombers B 26, A 26, and A 20, as well as in the fighter P 38. These were also used in B 25's and its USN version PBJ. The position of the wheels were indicated by the 3 small window