Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1712 Register 150717 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150717 US Marine Corps 1970-12-31Sikorsky UH-34D, cn 58-1712, ff:? del USMC as UH-34D, 150717, unk soc 31Dec70. Send Updates Use APP to upload photo @ (optional) When Now? / / Send