Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1668 Register 150260 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150260 US Marine Corps Sikorsky UH-34D, cn 58-1668, ff:? del USMC as UH-34D, 150260, unk wfu & xfer US register as N4217Y, unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send