Helicopter Sikorsky HRS-1 Serial 55-038 Register 127803 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127803 US Marine Corps 1951-07-03Sikorsky S-55 c/n 55-038, ff:? del USMC as HRS-1, 127803, 03Jul51 served as /HR-14 with HMR-161 during the Korean War 1952-03-01 w/o 01mar52 Korea Send Updates Use APP to upload photo @ (optional) When Now? / / Send