Helicopter Sikorsky HO5S-1 Serial 52-035 Register HP-456 N74818 128605 used by US Marine Corps USMC. Built 1952. Aircraft history and location Aircraft History 128605 US Marine Corps 1952-07-24Sikorsky S-52-3, c/n 52-035, ff:? acc BuAerRep (BAR) East Hartford, CT, 24Jul52 del USMC as HO5S-1, 128605, 05Aug52. 1956-07-18soc 18jul56 N74818 - Sikorsky S-52-3 wfu & reg US as S-52-3, N74818, unk. HP-456 - Sikorsky S-52-3 reg as HP-456, unk w/o unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send