The mask of Korr
Who is this Korr? Well, gather 'round and I'll tell ye. Korr, or Darth Xarak, as he was known to most of the galaxy, had a mask. Now this isn't just your ordinary tribal mask, this is your state of the art mask with thermal imaging, and an HUD. Now Xarak isn't anytin' like our Darth, Darth Vader, Xarak was smart, and understood people. Xarak had a heart. Yeah, a sith wit' a heart, you're sayin' nah, can't be, sith don't have hearts. Well some of 'em do, and Xarak did. 'Course, by the time Xarak made the mask in its current, perfect form, he has renounced his sith-hood, and became known by his real name, Korr. As Korr, he finished his mask, and created a second, to carry on his legacy. That legacy never came, so the second mask was lost in time, never seen, until our current Darth, Darth Vader.
Supposedly the original and second masks were found by Emperor Palpatine. This Emperor decided to give the original mask, the one Korr never wore after renouncing the sith, to Darth Vader, because of its Dark Side properties.
So it should really be titled The mask of Vader.