Helicopter Sikorsky H-19B Chickasaw Serial 55-831 Register 53-4885 used by US Air Force USAF. Built 1955. Aircraft history and location Aircraft History 53-4885 US Air Force 1955-01-17Sikorsky S-55 c/n 55-831, ff:? del USAF as H-19B, 53-4885, 17Jan55. Send Updates Use APP to upload photo @ (optional) When Now? / / Send