“That helm was made of grey steel adorned with gold, and on it were graven runes of victory. A power was in it that guarded any who wore it from wound or death, for the sword that hewed it was broken, and the dart that smote it sprang aside. It had a visor (after the manner of those that the Dwarves used in their forges for the shielding of their eyes), and the face of one that wore it struck fear into the hearts of all beholders, but was itself guarded from dart and fire. Upon its crest was set in defiance a gilded image of the head of Glaurung the dragon; for it had been made soon after he first issued from the gates of Morgoth.”
"Narn i Chîn Húrin"