On the inside of the helmet fairly close to the brim and near that round thing sticking out I can see Q 66 stamped there, it might be O 66 I can't see it very well. The item "German WW1 camo metal helmet/leather liner" is in sale since Monday, March 13, 2017. This item is in the category "Collectibles\Militaria\WW I (1914-18)\Original Period Items\Germany\Hats & Helmets". The seller is "beaver2eqn" and is located in La Pine, Oregon.
This item can be shipped to United States.