Helicopter Sikorsky HUS-1 / UH-34D Seahorse Serial 58-916 Register 145773 used by US Marine Corps USMC. Built 1958. Aircraft history and location Aircraft History 145773 US Marine Corps Sikorsky HUS-1, cn 58-916, ff:? del USMC as HUS-1, 145773, unk w/o 3oct63 Send Updates Use APP to upload photo @ (optional) When Now? / / Send