In the late 1940s the RAAF (Royal Australian Air Force) was using 2 main types of flying helmets – both from the WW2 period.
Both helmets had the same type of basic design structure and layout and only differed in the matieral used. The leather type was more suitable for higher and cold flying operations and the mesh type for humid/tropical operations.
The mesh E type helmet was the type mainly used in Korea along side the C helmet. Korea’s weather varied from hot to cold as did most places so the pilots had to wear suitable clothing to suit the conditions.
The primary oxygen mask used was the British H mask and the USAAF A-14 mask.
The introduction of the Meteor jet into service saw at first C helmets used and then over time, modification of the USAF P-1A flight helmet to accommodate the RAF communication receivers and wiring. This helmet provided much better protection when ejecting from the Meteor when compared to the C helmet. This move to a hard flight helmet was the beginning of the RAAF use of flight helmets that continues until present day.
Shown below are RAAF Pilots in Korea.
The E helmets were used up until mid 1950s in the reserve (city) squadrons who flew the CAC Mustangs back in Australia. The E helmet was a tight fitting helmet, well designed to block out sound. It was on par or better than the USAAF similar styled ANH-15 flying helmet of WW2.
Here is me with my own E helmet and gear for comparison.