WWI French Adrian Helmet with Brass Veteran Visor

 WWI French Adrian Helmet.  Complete with original liner.  No strap.  In good overall shape.  Some distortion to the bill, mostly covered by the brass visor, given to veterans of WWI.

At the outbreak of World War I, soldiers in the French army wore the standard kepi cap, which provided no protection against injury. The early stages of trench warfare proved that even basic protection of the head would result in a significantly lower mortality rate among front-line soldiers. Consequently, the French staff ordered the development of a metal helmet that could protect soldiers from the shrapnel of exploding artillery shells. Since soldiers in trenches were also vulnerable to shrapnel exploding above their heads, a deflector crest was added along the helmet's axis. Branch insignia in the form of a grenade for line infantry and cavalry, a bugle horn for chasseurs, crossed cannon for artillery, an anchor for colonial troops, and a crescent for North African units was attached to the front.

A 2020 study found that the Adrian helmet outperformed the Advanced Combat Helmet, which was deployed almost a century later, in overhead blasts. It also surpassed the stahlhelm and Brodie helmets. The researchers believed the crest, a feature unique to the Adrian helmet, might be the cause.