Altitude and Airspeed Handset, Gunnery System B-29 Superfortress F3D Skyknight I is a straightforward gyro-magnetic

I is a straightforward gyro-magnetic compass using magnets for deviation correction of the detector unit (usually located in the tail or wingtip)

This is a Gyrosyn Compass Master Indicator Type C

They are quite difficult to find

The serial numbers on the instrument and the case are different

changes the barometric display

Altitude and Airspeed Handset, Gunnery System B-29 Superfortress F3D Skyknight I is a straightforward gyro-magneticHere is an original WWII era Altitude and Airspeed Handset as used in the Boeing B 29 Superfortress bomber. This was a module of the B 29's Central Fire Control System, the remote control gun turret system. This critical component was installed at the Navigator's station in the B 29 (see image of the station from the B 29 flight manual. Handset is at the bottom of the photo). It was his responsibility to ensure that the dials on the handset for