Helicopter Sikorsky HO4S-2 Serial 55-087 Register N17376 1253 used by US Coast Guard USCG. Built 1951. Aircraft history and location Aircraft History 1253 US Coast Guard 1951-11-15Sikorsky S-55 c/n 55-087, ff:? del USCG as HO4S-2, 1253, 15Nov51. N17376 - ex 1253 Send Updates Use APP to upload photo @ (optional) When Now? / / Send