It was a helmet, devoid of a texture, yet something about it just struck me as familiar... I looked it up, and after a bit of digging around in the game files, came up with this.
Now some of you may recognize this, but for those who don't, [check this out] .
However, don't go trying to get this set ingame, though. The guy who drew up those sets is the leading artist for Spiral Knights, therefore I believe that this set is exclusive. Which is a shame 'cause the helmet is so nice.
Edit: Oh my god, the game files are packed with other Crest files.