Helicopter Sikorsky HSS-1 / SH-34G Seabat Serial 58-503 Register 143874 used by US Navy USN. Built 1957. Aircraft history and location Aircraft History 143874 US Navy 1957-04-12Sikorsky HSS-1, c/n 58-503, ff? del US Navy as HSS-1 143874, 12Apr57 to HSS-1N (ASC 84), unk wfu & soc, unk Send Updates Use APP to upload photo @ (optional) When Now? / / Send