Bomb Sight, Sighting Head for T-1 Bombsight System
The World War II T-1 bombsight system was originally designed by the British (as the Mark XIV bombsight) and first entered service in 1942. It was used in versions of the US Army Air Force B-24 Liberator, B-25 Mitchell bombers, as well as the British Avro Lancaster and deHavilland Mosquito bombers. This T-1 Sighting Head was made by AC Spark Plug division of GMC. The system included a sighting head connected to a mechanical (pneumatic) computer.