Helicopter Sikorsky S-55 Serial 55-759 Register SE-HBA used by osterman helikopter. Built 1954. Aircraft history and location Aircraft History SE-HBA osterman helikopter 1954-07-22Sikorsky S-55 c/n 55-759, ff:? del Osterman Aero AS as SE-HBA, 22Jul54 w/o 06Sep63. Send Updates Use APP to upload photo @ (optional) When Now? / / Send