We do need those markings spelled out. I see no problems with the helmet except for those tin reinforcement discs behind the helmet plate screws. This could be nothing, the discs are originals but usually this was done because of enlarged holes or perhaps an extra hole. The screw posts and nuts on the wappen indicates that it was originally from an older helmet ie before they switched to the brass loop and leather wedge system. A pic of the front of the hemet sans wappen would clear this up.