Helicopter Sikorsky HRS-1 Serial 55-042 Register 127807 used by US Marine Corps USMC. Built 1951. Aircraft history and location Aircraft History 127807 US Marine Corps 1951-07-03Sikorsky S-55 c/n 55-042, ff:? del USMC as HRS-1, 127807, 03Jul51 1953-09-16 w/o 16sep53 at Cherry Point Send Updates Use APP to upload photo @ (optional) When Now? / / Send