This WWI helmet may outperform modern ones against shock waves
Artifact of the Week: Battle-damaged Helmet | NC DNCR
Prussian Cavalry Officer Helmet > National Museum of the United States Air Force™ > Display
Steel Helmet, MK I Brodie pattern: British Army | Imperial War Museums
National Museum of the Marine Corps - Artifact Highlight - WWI 2d Division Helmet circa 1918 This M1917 helmet belonged to Marine Arthur E. Lyng. Lyng was a Navy Cross and Distinguished
The Brodie Helmet | National Army Museum, London
Amazon.com : Epic Militaria WW1 US M17 Helmet - American Military Army Steel Cotton Lined Reproduction (Medium (56/57 cm)), Green : Sports & Outdoors
How the Military Helmet Evolved From a Hazard to a Bullet Shield | At the Smithsonian| Smithsonian Magazine
5 Real-Life WWI Artifacts As Depicted In Netflix's "All Quiet on the Western Front" | National WWI Museum and Memorial
John Leopold Brodie (1873-1945) - Mark 1 steel helmet