Helicopter Sikorsky S-55 Serial 55-560 Register used by Mitsubishi (Mitsubishi Heavy Industries). Built 1954. Aircraft history and location Aircraft History n/a Mitsubishi 1954-04-15Sikorsky S-55, c/n 55-560 del Mitsubishi, 15Apr54 to Japan as NSAG 1-3 Send Updates Use APP to upload photo @ (optional) When Now? / / Send