Original Imperial German WWI M16 Stahlhelm Helmet with Liner Technical Books Branch insignia in the form

Branch insignia in the form of a grenade for line infantry and cavalry

or repairing an aircraft under fire after landing on a hostile territory

It is marked 8321 on the upper flat of the right side leg

A similar example can be found at the Smithsonian National Air and Space Museum as seen at this link

Original Imperial German WWI M16 Stahlhelm Helmet with Liner Technical Books Branch insignia in the formOriginal Item: Only One Available. This is a very good example of a totally original WWI German M16 Helmet, with a very nice green paint scheme. This helmet in particular has faint traces of a regular green as used by the Afghan National Army from the 1930s up until the 1970s. The stamped, sheet steel construction, helmet retains about 60% of the original paint, showing a lot of service wear on the crown, which now has light oxidation. The helmet