Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1711 Register 150580 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150580 US Marine Corps 1968-03-16Sikorsky UH-34D, cn 58-1711, ff:? del USMC as UH-34D, 150580, unk damage sustained on 16Mar68, w/o 26Apr68. Send Updates Use APP to upload photo @ (optional) When Now? / / Send