Originally was a blue-quality item that started the quest Enchanted Thorium Platemail: Volume III. Although the quest had been removed in patch 4.0.1, it remained unchanged. But in patch 5.0.4, in an undocumented change, the item was converted to what you see now on this page.
Originally was a blue-quality item that started the quest Enchanted Thorium Platemail: Volume III. Although the quest had been removed in patch 4.0.1, it remained unchanged. But in patch 5.0.4, in an undocumented change, the item was converted to what you see now on this page.