These instruments were acquired over 12 years ago from an aircraft salvage and repair operation for a flight simulator project. Some items were tested at the time, but I cannot confirm whether this particular unit was one of them or what its result was. It has since been stored and moved. It has not been tested for this sale, and its current operating condition is unknown. Sold for parts or repair. No current airworthiness, calibration, inspection, or certification is represented. Buyer should review the photos and arrange any testing or documentation needed before aircraft use.