Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1697 Register 150568 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150568 US Marine Corps 1968-07-23Sikorsky UH-34D, cn 58-1697, ff:? del USMC as UH-34D, 150568, unk w/o Vietnam, 23Jul68. Send Updates Use APP to upload photo @ (optional) When Now? / / Send