Helicopter Sikorsky HRS-2 Serial 55-118 Register 129030 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 129030 US Marine Corps 1952-04-01Sikorsky S-55 c/n 55-118, ff:? del USMC as HRS-2, 129030, 01Apr52 1954-11-17 Sikorsky HRS-3 17nov54 Send Updates Use APP to upload photo @ (optional) When Now? / / Send