The shell is vaguely marked ET6? Probably ET66 as helmet's circumference is approx.
Helmet has rust, there are no offensive markings in this listing. I have no more knowledge of this item, please see pictures. The item "ORIGINAL WW2 M35 GERMAN HELMET WWII M1935 SD ET66" is in sale since Thursday, August 8, 2019. This item is in the category "Collectables\Militaria\World War II (1939-1945)\Helmets/ Hats". The seller is "a0412j" and is located in England.
This item can be shipped to all countries in Europe, United States, Antigua and barbuda, Australia, Bahrain, Canada, Japan, New Zealand, China, Israel, Hong Kong, Indonesia, Mexico, Singapore, South Korea, Taiwan, Thailand, Bangladesh, Belize, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Dominica, Egypt, Guadeloupe, Grenada, French guiana, Jordan, Cambodia, Saint kitts and nevis, Saint lucia, Sri lanka, Macao, Maldives, Montserrat, Martinique, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Turks and caicos islands, Aruba, Saudi arabia, South africa, United arab emirates, Chile, Bahamas, Colombia, Costa rica, Dominican republic, Guatemala, Honduras, Jamaica, Kuwait, Panama, Philippines, Qatar, El salvador, Trinidad and tobago, Uruguay.