WWII RAF Lancaster Bomber Auto Controls Automatic Steering Control

Here we have an original part of the original Bomb aiming delivery system as fitted to Lancaster Bombers and other RAF Bombers in WWII. 

Upon approaching the designated target the Bomb Aimer would take temporary control of the aircraft. Having released  the payload the Bomb Aimer would then relinquish control of the aircraft back to the pilot

This item is part of the auto control unit and is the automatic steering control unit MK IV

As can been seen in the photos there is some paint loss commensurate with the age of this item. The large central control knob moves freely