Helicopter Sikorsky HRS-2 Serial 55-104 Register 129022 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129022 US Marine Corps 1952-02-22Sikorsky S-55 c/n 55-104, ff:? del USMC as HRS-2, 129022, 22Feb52 1955-02-25 Sikorsky HRS-3 25feb55 1967-02 feb67 wfu, DM sold Send Updates Use APP to upload photo @ (optional) When Now? / / Send