A rather interesting British Mk 6a with a Mk 7 liner and chinstrap installed that I stumbled on some time ago and I am afraid I cant bring much to the party as it were in the form of knowledge gents as I cant seem to find much information on them on the world wide web so it is not clear to me at least when or why these helmets were fitted with the Mk 7 liner and chinstrap system but I do know of at least three other examples in private collections so this does suggests at the least not a 1 off as it were...
It has been suggested by a friend and fellow collector that perhaps they were a trials helmet and the manufacturer needed a model to try out the new Mk-7 harness and chinstrap system before going into the final production stage...
Regards Mark K
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