RAF MK-1A Pilots Helmet Liner, Cold War era

I have for sale an original vintage RAF flying helmet liner in blue-grey fabric, dating from the Cold War era.
This is an authentic piece of British military aviation equipment, featuring the original adjustable chin strap, press studs and metal communication attachment eyelets.

My husband found this in 1971 near his home in Sutton in Ashfield, shortly after 2 Canberra aircraft had crashed over Coxmoor Golf Course. The crews of both planes ejected and parachuted to safety.
He always wondered at the time if it was connected to this, but obviously there's no way of confirming it.

A great addition for military collectors, RAF memorabilia enthusiasts, reenactors, museums, or as a display or film prop.

Condition:
Good vintage used condition.
Expected signs of age, storage and service use.
Fabric is in good overall condition with no major damage noted.
Chin strap, buckle, press studs and metal fittings are all present.
Please study all photographs carefully as they form part of the description.

Features:
Original RAF flying helmet liner
Blue-grey fabric construction
Adjustable chin strap with metal buckle
Multiple metal eyelets for communication equipment
Approximate age: 1960s (Cold War period)
No actual helmet included just the liner