:D thanks for all the feedback.
I'll try to get my nroman reenactment society to accept it. after all, if they are willing to have a knights templar and a hospitaler sitting in england/wales why shouldnt there be a kettle helm?

In the Wikipedia page on kettle hats, it states "[t]hey were first produced (as reported in Documentaria Anglo, 1478) in England around 1011, 55 years before the famous Battle of Hastings." If you look, you might also noticed that several webpages selling lower end European helmets have plagiarized this line verbatim from Wikipedia. :wtf:

But, is there any actual indication that this claim is true? Realistically, there's no way that someone writing during the late 15th century could be reliably informed about armour at the turn of the 11th century unless they had some earlier manuscript, now lost, from which they made their statement. What does the passage in question from the Documentaria Anglo actually say?