In Wrath of the Lich King it is item level 258, requires level 80, sells to vendors for 12g 47s 80c and is named Judgement Heaume. In MoP Classic it is item level 245, requires level 80, sells to vendors for 12g 47s 80c and is named Judgement Heaume.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Judgment Heaume Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Judgment Heaume suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Judgment Heaume is part of the transmog set Judgment Armor (Paladin only). The other 13 pieces:
Blizzard numbers items as they are created, so the named items next to ID 49475 (49470 to 49480) were usually added in the same batch as Judgment Heaume: the same quest line, zone, vendor or reward set.