I do not know if it works properly you might need to work on it to get it to work 100%. This is a very rare hard to find collectible item. ARMY AIR FORCES Type M7 C1 AUTOPILOT VERTICAL FLIGHT GYRO.This item was positioned near the aircraft's center of gravity, the flight gyro, part of the complex autopilot system used in WWII bombers, served as a vertical reference for controlling the ailerons an elevator of the aircraft. The course for the autopilot was set by the bombardier through the use of the Norden Bombsight, which provided stable and level flight for bombing runs. This was used on the B 17, B 24 and B 29 aircraft during WWII. This item is in the category "Collectibles\Transportation\Aviation\Military Aircraft\Other Military Aircraft Items". The seller is "na1990" and is located in this country: US. This item can be shipped to United States, China, Mexico, Germany, Japan.