Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1603 Register 150237 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150237 US Marine Corps 1973-12-06Sikorsky UH-34D, cn 58-1603, ff:? del USMC as UH-34D, 150237, unk xfer to Air America, unk lost in Laos, 06Dec73. Send Updates Use APP to upload photo @ (optional) When Now? / / Send