Here's another replica, but it's marked as such:
http://www.ebay.com/itm/REPRODUCTION-WWI-PRUSSIAN-UHLAN-LANCERs-HELMET-NEW-/160973154682?pt=LH_DefaultDomain_0&hash=item257abf697a" onclick="window.open(this.href);return false;
What holds the visor trim in place? :-"