British Mk 4 Helmet With Updated, Later Type, Liner

[Flying10uk]

Here is my British Mk 4 helmet with the updated, later type, liner which some people refer to as the Mk 5 helmet although I believe that the official designation was still the Mk 4 helmet. It was simply a completely redesigned liner fitted into the existing Mk 4 helmet shell in order to provide greater padding/protection around the head. The helmet shell wasn't changed in any way.