There are no foliage slits. There are no markings other than the EGA's. I don't know when the stenciled EGA's were authorized for the helmet cover. The item "Korean War Era USMC Cover With Helmet & liner" is in sale since Saturday, September 29, 2018. This item is in the category "Collectibles\Militaria\Korea (1950-53)\Original Period Items".
The seller is "wildgeese724" and is located in Beaver Falls, Pennsylvania. This item can be shipped to United States.