Helicopter Sikorsky HO5S-1 Serial 52-023 Register 126698 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 126698 US Marine Corps 1952-05-29Sikorsky S-52-3, c/n 52-023, ff:? acc BuAerRep (BAR) East Hartford, CT, 29May52 del USMC as HO5S-1, 126698, 25Jun52. 1957-01-23soc 23jan57 Send Updates Use APP to upload photo @ (optional) When Now? / / Send