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 model has two adjustable vanes (peep and far) with prism for viewing compass bearing and spirit level

The serial numbers on the instrument and the case are different

They are quite difficult to find

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