Helicopter Sikorsky HO5S-1 Serial 52-031 Register 128601 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 128601 US Marine Corps 1952-06-30Sikorsky S-52-3, c/n 52-031, ff:? acc BuAerRep (BAR) East Hartford, CT, 30Jun52 del USMC as HO5S-1, 128601, 03Jul52. 1953-05-14w/o 14may53 with VMO-1. VMO-1 Send Updates Use APP to upload photo @ (optional) When Now? / / Send