Helicopter Sikorsky HRS-2 Serial 55-167 Register 129049 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129049 US Marine Corps 1952-06-10Sikorsky S-55 c/n 55-167, ff:? del USMC as HRS-2, 129049, 10Jun52 1952-11-20 w/o 20nov52 California Send Updates Use APP to upload photo @ (optional) When Now? / / Send