i'm surprised you didnt mention the kill strip colors are different in the movies but its the 'same' helmet, lol
we'll know more than likely , when the show comes out. it be kinda cool if it was his dads helmet , maybe he tried to hammer out the dent and thats why it got edges lol. maybe he did hammer the dent out... and vader gave him a new one and told him to keep it as a reminder lol if he hammered it out he'd get the blade end next time. 