Helicopter Sikorsky HRS-1 Serial 55-022 Register 127788 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127788 US Marine Corps 1951-04-26Sikorsky S-55 c/n 55-022, ff:? del USMC as HRS-1, 127788, 26Apr51 1953-06-03 w/o 03jun53 at El Moro Canyon, CA Send Updates Use APP to upload photo @ (optional) When Now? / / Send
