Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1581 Register 150226 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150226 US Marine Corps 1968-09-19Sikorsky UH-34D, cn 58-1581, ff:? del USMC as UH-34D, 150226, unk w/o Phu Bai, RVN, 19Sep68. Send Updates Use APP to upload photo @ (optional) When Now? / / Send