From Dungeons of Dredmor Wiki
This knight's helm looks a lot like a bucket if a bucket had a hole cut in it for you to see through and a visor you could raise to eat through. These features would not be useful on most buckets, however.
Worth 1600 zorkmids. B:2608 S:1008 B:3312 S:688 B:3888 S:368
It can be crafted with the following recipe: