This is an original M16 helmet shell. It was make by J. & H. Kerkmann, Ahlen/Westf, one of the smaller helmet makers during WWI. This factory made there variations of the M16 design, this is shell is the most common. The shell is in excellent shape and ready to be restored to your specs. Great War, Weirmar, and Third Reich eras are all a possibility here. The restorations comes with a liner and chinstrap.