Helicopter Sikorsky HRS-1 Serial 55-063 Register 127827 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127827 US Marine Corps 1951-09-26Sikorsky S-55 c/n 55-063, ff:? del USMC as HRS-1, 127827, 26Sep51 1957-09 soc Sep57 Memphis Send Updates Use APP to upload photo @ (optional) When Now? / / Send