How a WWI war helmet outperformed modern gear in a new study | PBS NewsHour
John Leopold Brodie (1873-1945) - Mark 1 steel helmet
Belgian steel helmet | NZHistory, New Zealand history online
Military helmets - an introduction | Australian War Memorial
Steel Helmet | International Encyclopedia of the First World War (WW1)
Steel Helmet | International Encyclopedia of the First World War (WW1)
Bashford Dean and Helmet Design During World War I | The Metropolitan Museum of Art
John Leopold Brodie (1873-1945) - Mark 1 steel helmet
Helmet, Protective, Type M1917, United States Army Air Service | National Air and Space Museum
steel helmet, Mark I, fitted with 2nd pattern, Cruise visor | Imperial War Museums
Helmet wz.15 Adrian - French steel helmet - Blocks by piece - for kids 5 | Cobi Toys
5 Real-Life WWI Artifacts As Depicted In Netflix's "All Quiet on the Western Front" | National WWI Museum and Memorial
W. H. Mullins Co. | American Helmet Model No. 7, Sentinel's Helmet | American, Salem, Ohio | The Metropolitan Museum of Art
British Brodie pattern steel helmet from Fromelles | Australian War Memorial
Hale & Kilburn Company | American Helmet Model No. 5 | American, Philadelphia | The Metropolitan Museum of Art
Soldier finds, restores pieces of history from Afghan bazaar | Article | The United States Army
Steel Helmet, MK I Brodie pattern: British Army | Imperial War Museums
Ford Motor Company | American Helmet Model No. 8 | American, Philadelphia | The Metropolitan Museum of Art
Brodie Helmet / Helmet, steel, Mark I (World War I) - YouTube
A Short History of the German Steel Helmet of the Great War - Alexander and Sons German Helmet Restoration
World War I Centenary: Helmets
Stahlhelm - Wikipedia
