Helicopter Sikorsky HO5S-1 Serial 52-025 Register 126700 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 126700 US Marine Corps 1952-05-29Sikorsky S-52-3, c/n 52-025, ff:? acc BuAerRep (BAR) East Hartford, CT, 29May52 del USMC as HO5S-1, 126700, 25Jun52. 1953-07-23w/o 23jul53 with VMO-1. VMO-1 Send Updates Use APP to upload photo @ (optional) When Now? / / Send