Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-493 Register 143979 used by US Marine Corps USMC. Built 1957. Aircraft history and location Aircraft History 143979 US Marine Corps 1957-04-02Sikorsky HUS-1 cn 58-493, ff:? del USMC as HUS-1, 143979, 02Apr57 redesig UH-34D, Oct62 soc MARTD Alameda, 15Oct70. Send Updates Use APP to upload photo @ (optional) When Now? / / Send