Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1643 Register 150251 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150251 US Marine Corps 1965-10-27Sikorsky UH-34D, cn 58-1643, ff:? del USMC as UH-34D, 150251, unk w/o Southeast Asia 27Oct65. Send Updates Use APP to upload photo @ (optional) When Now? / / Send