Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1704 Register 150573 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150573 US Marine Corps 2001-05-17Sikorsky UH-34D, cn 58-1704, ff:? del USMC as UH-34D, 150573, unk noted at Carson Helicopters as N94520, Perkasie, PA, 17May01. Send Updates Use APP to upload photo @ (optional) When Now? / / Send