Uh....I hope you are referring to some other "Tony"? I have one, count-em, one Garde Kürassier helmet, and it is not an officer. So I doubt very much that I am an authority on these.
All I know, is that they have been making replicas for years, unless I could actually look at one of these, I would be cautious. The lining and the backing to the neck guard look to be typical for an original, but the lack of holes for the spike base like Bill spotted is very odd? The Wappen, yuk.
Dozens of countries used helmets similar to this; Norway, Sweden, Russia, Mexico, Spain, and scores of others. I wonder if this is a shell from one of those "other" countries that just looks German and it has been "tuned up" to make it look German? I have no idea.