The back skirt of the helmet is stamped 3801. Shield decal is about 80% and the Eagle is about 50%.
This helmet is out of my personal collection and I will personally guarantee its authenticity. The item "M 40 WWII German Double Decal Helmet- Original" is in sale since Sunday, October 01, 2017. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\Germany\Hats & Helmets".The seller is "193rdsow" and is located in York, Pennsylvania. This item can be shipped worldwide.