Flap Position Indicator B-24 Liberator, PB4Y Privateer, WWII GE DJ11 Grumman The rubber eyepiece is has

The rubber eyepiece is has deteriorated with age

or concave surface of the intake valve (n

This is a late WWII-era Wheel and Flap Position Indicator

The Army Type F-1A Airspeed Indicator was used across a number of US Army Air Corps and Air Force aircraft during WWII

An exceptional find

Flap Position Indicator B-24 Liberator, PB4Y Privateer, WWII GE DJ11 Grumman The rubber eyepiece is hasThis is a Flap Position Indicator as used in the WWII era Consolidated US Army Air Force B 24 Liberator Heavy Bomber (see 2 cockpit photos and photo from the B 24 Pilots Manual dated 1944) and the US Navy's PB4Y4 Privateer Patrol Bomber (see photo from Flight Manual dated 1945). Made by General Electric, Type DJ11. The indicator provided visual information on the angle of extension of the wing flaps during take off and landing, measured from full up