Helicopter Sikorsky HRS-2 Serial 55-164 Register 129046 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129046 US Marine Corps 1952-06-05Sikorsky S-55 c/n 55-164, ff:? del USMC as HRS-2, 129046, 05Jun52. 1955-03-17 Sikorsky HRS-3 17mar55 1965-02-18 soc 18feb65 Mayport Send Updates Use APP to upload photo @ (optional) When Now? / / Send