These helmets are a reminder of a time that should never be forgotten. They stand as symbols of the bravery and sacrifice of the soldiers who wore them. The history they represent is both vast and complex, touching every corner of the globe. To own one of these helmets is to hold a piece of history in your hands. Helmet on the left brown/gray. This is a German Stahlhelm, most likely an M35 or M40 model used by Nazi Germany during World War II. Helmet on the right (green with cloth strap). M1 helmet, introduced in World War II and used through the Vietnam War.