Hello,
There are several significant things that are wrong with this helmet. The liner, for one thing. The wappen not having the black eagle on it but instead having some sort of cypher or monogram on it.
We have a good search engine here, up on the toolbar near the top of the home page of the forum, where you can search for other postings about Garde du Corps helmets. These other topics are very helpful in figuring out whether or not you will want to buy this helmet.
I also just now bumped an old topic thread to the top of the forum, and you may find it helpful to read the 5-pages of comments there.
Best Wishes,
Alan