Craftsman David W O'Brien served in the Royal Corps of Australian Electrical and Mechanical Engineers, and flew test flights in Vietnam with 161 Reconnaissance Flight (161 Recce) in 1965-66. His job was to ensure that instrument panels were functioning properly. This helmet was assembled for him by Corporal Peter D Menear, Air Radio Technician, Royal Australian Airforce, who was also serving in 161 Recce. Craftsman O'Brien requested that he have his own helmet, instead of having to be issued with one prior to each test flight and retuning it afterwards. Corporal Menear obliged.A flying helmet. Gentex/ 8415-782-3037. Is khaki in colour with a sun visor. It is fitted with a microphone at the front. 19 Large/ DSA100-4804 Gentex Corp. Microphone / M-33A/AIChelmet, vietnam, raaf, o'brien, 161 recce, menear

Olive green fibreglass lined helmet with earphones and microphone used by dustoff medicGentex Corporation; 8415-144-4981flight helmet, virtue 2793109, 8th field ambulance

The American -made Combat Vehicle Crewman's helmet was worn by crewmembers requiring access to a vehicle's communication system. The helmet was intended to offer head protection inside the vehicle but it did provide some protection against shrapnel.Khaki coloured helmet with chinstrap. Lined inside with black padding, it has built in earphones with attachments and plug connection and a small mounted microphone.NIL GENTEX CARBON DALE P.A. 18407helmet, gentex, communication, crewman's helmet, us helmet