Helicopter Sikorsky H-19D Chickasaw Serial 55-573 Register 52-7608 used by US Army Aviation Army. Built 1953. Aircraft history and location Aircraft History 52-7608 US Army Aviation 1953-11-05Sikorsky S-55 c/n 55-573, ff:? del US Army as H-19D, 52-7608, 05Nov53. Send Updates Use APP to upload photo @ (optional) When Now? / / Send