No unit or other markings. It is a size 66cm shell. It is clearly stamped "66" in the correct position on the inside skirt. However, and this is strange, I cannot find a maker code anywhere. I have been a collector of Great War Militaria for over a decade.
I stand by what I sell and guarantee authenticity. If for some reason you have an issue with the item once in hand, contact me and we will work out the details. I will insure the package for its value and carefully pack the box. Over the next several weeks I will be posting other Imperial German Military items for sale, including: Picklehaubes, Stahlhelms, Belt Buckles, Breadbags, Packs, etc... The item "World War One Imperial German 1916 Helmet Stahlhelm. Original with Chinstrap" is in sale since Sunday, July 26, 2015.This item is in the category "Collectibles\Militaria\WW I (1914-18)\Original Period Items\Germany\Hats & Helmets". The seller is "worldwarscollector" and is located in Pottstown, Pennsylvania. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, CO.