The computation was performed mechanically (with much done pneumatically). A set of replaceable cams were provided which adjusted the unit for each type of plane. The item "WW2 Army Air Force corp Sperry Bombsight T1A with Original Case" is in sale since Wednesday, October 16, 2019.
This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Personal, Field Gear". The seller is "tim2511" and is located in Circle Pines, Minnesota.
This item can be shipped to United States.