Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1571 Register 150221 used by US Marine Corps USMC. Built 1963. Aircraft history and location Aircraft History 150221 US Marine Corps 1970-06-25Sikorsky UH-34D, cn 58-1571, ff:? del USMC as UH-34D, 150221, unk soc NAF Cam Ranh Bay, RVN, 25Jun70. Send Updates Use APP to upload photo @ (optional) When Now? / / Send