WWI Model 1916 Austrian Combat Helmet – The Ruptured Duck, LLC
Stahlhelm - Wikipedia
Stahlhelm - Wikipedia
Bomber Crew Protection > National Museum of the United States Air Force™ > Display
Austro-Hungarian Berndorfer Helmet
What is the Difference Between WW1 German and Austro Hungarian Helmets? - YouTube
World War I Fast Facts | CNN
Amazon.com: Helmets of the First World War: Germany, Britain & their Allies (Schiffer Military History Book): 9780764310201: Haselgrove, Michael J.: Books