Helicopter Sikorsky HRS-2 Serial 55-145 Register 129038 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129038 US Marine Corps 1952-05-06Sikorsky S-55 c/n 55-145, ff:? del USMC as HRS-2, 129038, 06May52 1954-04-27 Sikorsky HRS-3 27apr54 1967-10-24 soc 24oct67 North Island Send Updates Use APP to upload photo @ (optional) When Now? / / Send