File:US Army Signal Corps airplane radio telegraph transmitter, Type BC-15A, made by Connecticut Telephone and Electric Co, 1918 - National World War I Museum - Kansas City, MO - DSC07722.JPG
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![File:US Army Signal Corps airplane radio telegraph transmitter, Type BC-15A, made by Connecticut Telephone and Electric Co, 1918 - National World War I Museum - Kansas City, MO - DSC07722.JPG](https://upload.wikimedia.org/wikipedia/commons/thumb/2/28/US_Army_Signal_Corps_airplane_radio_telegraph_transmitter%2C_Type_BC-15A%2C_made_by_Connecticut_Telephone_and_Electric_Co%2C_1918_-_National_World_War_I_Museum_-_Kansas_City%2C_MO_-_DSC07722.JPG/450px-thumbnail.jpg?20111116223756)
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