US M1 Helmet Liner - American WW2 KOREA M1 Liner - CAPAC Westinghouse markings | eBay
United States Army Military Police Corps Regimental Museum - For former MPs who have wondered what the markings meant on the MP helmet liners they wore, we compiled a reference from Army
World War 2 - U.S. Mine Safety Appliance M1 Helmet Liner - M1 Militaria
M1 Helmet Liner - Vietnam Era Type I Infantry - Mid War – J. Murray Inc. 1944
Ryedale Auctioneers | Antiques, Interiors and Collectables | Lot 786
Original WW2 British Police MKII Steel Helmet by 'BMB'
M1 helmet - Wikipedia
A USA M1 Helmet with Vietnamese Police Markings. QC helmet liner. Ref: ML244
Original 1950s British Army 'Helmet, Steel, Airborne Troops' by 'CWL'
WW2 German, Soviet, Allied militaria, uniforms, awards, weapons history. War relics forum
Identifying and Collecting WWII M1 Helmet Liners - Military Trader/Vehicles
American WW2 / Austrian M1 Army Helmet Liner - Forces Uniform and Kit