@ubistorm Thank you so much for the reply. It could be that quest bug with that bone helmet? I don't know but here is a video.
https://www.flickr.com/gp/catacombcomics/kCF62a
I would like to add: I just finished the burning of the wickerman questline and now I got the helmet back. It's fixed but there is definitely a bug where
none of the helmets show on screen if doing said quest line..at least for me thank you.

I know how to hide and unhide the armors but for some reason since the 1.4.1 patch I can't see my helmet anymore. I tried verifiying all files etc even. Any work around? Is this a known bug? PC here.