Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1676 Register 150552 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150552 US Marine Corps 1968-07-27Sikorsky UH-34D, cn 58-1676, ff:? del USMC as UH-34D, 150552, unk w/o Phu Bai, RVN, 27Jul68. Send Updates Use APP to upload photo @ (optional) When Now? / / Send