ORIGINAL WW2 GERMAN M42 HELMET W/ LINER. My father bought this back from WW2. CKL66 and 4723 are on the helmet inside. The item "ORIGINAL WW2 GERMAN M42 HELMET With LINER CKL66" is in sale since Monday, October 29, 2018. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Hats & Helmets". The seller is "old-notes" and is located in Kingston, New York. This item can be shipped to United States.