The jist of that thread was this:
Some Thracian helmets had a piece along the top for the crest to mount to/because it was constructed in halves and there are some with the phygian pointy thing.
http://www.lonelymountain.hoplologia.org/thracian2a.jpg
http://www.by-the-sword.com/acatalog/ah-6112t.jpg
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