The Yarm helmet confirmed as Viking

[Duncan Head]

http://www.thehistoryblog.com/archives/59284
https://www.prestonparkmuseum.co.uk/preston-park-museum-britains-first-ever-viking-helmet-discovered/

I confess I had not heard of this helmet before.

[Erpingham]

I've seen it mentioned alongside the Gjermundbu helmet a couple of times but I don't think it has been well known until recent interest, presumably related to the published analysis.  I'd never seen a picture of it before, though.