Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1635 Register 150250 used by US Marine Corps USMC. Aircraft history and location Aircraft History 150250 US Marine Corps 1970-12-07Sikorsky UH-34D, cn 58-1635, ff:? del USMC as UH-34D, 150250, unk wfu & xfer MASDC as 3H0239, 07Dec70 noted in surplus yard near AMARC, 29Aug01. Send Updates Use APP to upload photo @ (optional) When Now? / / Send