It is using the same model as for normal items.
Code:
"Data\Item\" "HelmMale02.bmd" 8 78 2 0 2 2 1 1 0 "Dragon Helm-J" 57 26 0 68 0 120 30 0 0 0 4 0 1 0 0 0 0 0
"Data\Item\" "HelmMale04.bmd" 8 79 2 0 2 2 1 1 0 "Legendary Helm-J" 50 20 0 42 0 30 0 0 0 0 4 1 0 0 0 0 0 0
"Data\Item\" "HelmElf05.bmd" 8 80 2 0 2 2 1 1 0 "Guardian Helm-J" 53 25 0 45 0 40 80 0 0 0 4 0 0 1 0 0 0 0
"Data\Item\" "HelmMale26.bmd" 8 81 2 0 2 2 1 1 0 "Light Plate Mask-J" 46 22 0 42 0 70 20 0 0 0 4 0 0 0 0 1 0 0
"Data\Item\" "HelmMale41.bmd" 8 82 2 0 2 2 1 1 0 "Red Wing Helm-J" 50 20 0 42 0 26 4 0 0 0 4 0 0 0 0 0 1 0
"Data\Item\" "HelmMale60.bmd" 8 83 2 0 2 2 1 1 0 "Sacred Fire Helm-J" 54 26 0 52 0 85 0 0 75 0 2 0 0 0 0 0 0 1
And that dark glow effect is coded in client, so it's not in model.