Helicopter Sikorsky HO4S-3 Serial 55-709 Register 1306 used by US Coast Guard USCG. Built 1954. Aircraft history and location Aircraft History For 1306 see also tth 1306 sa330b 1306 2015 407gxp 54586 1306 US Coast Guard 1954-06-13Sikorsky S-55 c/n 55-709, ff:? del USCG as HO4S-3, 1306, 13Jun54 wfu & sold Carson Helicopters, 30Apr69. Send Updates Use APP to upload photo @ (optional) When Now? / / Send