Helicopter Sikorsky HRS-2 Serial 55-103 Register 129021 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129021 US Marine Corps 1952-02-22Sikorsky S-55 c/n 55-103, ff:? del USMC as HRS-2, 129021, 22Feb52 1952-12-11w/o 11dec52 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
