German helmets that had been buried for 100 years and were found in 2011.
One thing you have to keep in mind,is that (as seen on the pics) this dump has been drowned for decades,and so the helmets were preserved from the contact with the air. This dump was located after reading French soldiers letters from WWI.
The digger who found them has apparently enraged many by selling them instead of donating them to a museum.
The Stahlhelm was introduced into regular service during the Verdun campaign in early 1916.
The M1916 design had side-mounted horn-like ventilator lugs which were intended to be support for an additional steel brow plate orStirnpanzer, which only ever saw limited use by snipers and trench raiding parties, as it was too heavy for general use.
The shell came in different sizes, from 60 to 68, with some size 70s reported. Helmet weight varied from 0.98 kg to 1.4 kg, depending on shell size. The suspension, or liner, consisted of a headband with three segmented leather pouches, each holding padding materials, and leather or fabric cords could be adjusted to provide a comfortable fit. The one-piece leather chin strap was attached to the shell by M1891 chinstrap lugs, the same kind used in the Pickelhaube helmet.
The M1916 design provided excellent protection: Reserve Lieutenant Walter Schulze of 8th Company Reserve Infantry Regiment 76 described his combat introduction to the helmet on the Somme, 29 July 1916:
“… suddenly, with a great clanging thud, I was hit on the forehead and knocked flying onto the floor of the trench… a shrapnelbullet had hit my helmet with great violence, without piercing it, but sufficiently hard to dent it. If I had, as had been usual up until a few days previously, been wearing a cap, then the Regiment would have had one more man killed.”
But the helmet was not without its flaws. The ventilator horns often let cold air in during the winter, requiring the wearer to block the vents with mud or fabric. The large, flared skirt tended to make it difficult for soldiers to hear, distorting surrounding sounds and creating an echo when the wearer spoke.
Originally painted Feldgrau (field grey), the Stahlhelm was often camouflaged by troops in the field using mud, foliage, cloth covers, and paint. Official issue cloth covers in white and grey appeared in late 1916 and early 1917.
Camouflage paint was not formally introduced until July 1918, when German Army Order II, No 91 366, signed by General Erich Ludendorff on 7 July 1918, outlined official standards for helmet camouflage. The order stipulated that helmets should be painted in several colors, separated by a finger-wide black line. The colors should be relevant to the season, such as using green, brown and ochre in summer.
After the effectiveness of the M1916 design was validated during the 1916 campaigns, incremental improvements were subsequently made. The M1917 version saw improvements to the liner, but was otherwise identical to the original design.
Extensive redesigns were made for the M1918 model. A new two-piece chin strap was introduced, and was attached directly to the helmet liner rather than the shell. Certain examples of the M1918 had cutouts in the rim along the sides of the helmet. It has incorrectly been said that these cutouts were to accommodate using headphones while wearing the helmet. These cutouts were actually done to improve hearing and to reduce echo created by the large, flared skirt.
The M1918 Stahlhelm can be distinguished from the M1916, as the M1918 shell lacks the chinstrap rivet on the lower side of the helmet skirt found on earlier models.