Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-1446 Register 149346 used by US Marine Corps USMC. Aircraft history and location Aircraft History 149346 US Marine Corps 1962-10Sikorsky HUS-1, cn 58-1446, ff:? del USMC as HUS-1, 149346, unk redesig UH-34D, Oct62 wfu & xfer MASDC, unk to US registry as N4217L, unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send