In Wrath of the Lich King it is item level 245, requires level 80 and is named Terrorblade Breastplate. In MoP Classic it is item level 232 and requires level 80.
Read from the World of Warcraft client build files.
How Conqueror's Terrorblade Breastplate Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Conqueror's Terrorblade Breastplate suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Conqueror's Terrorblade Breastplate Fits
Other Items Named Conqueror's Terrorblade Breastplate
1 other item in the current build is also called Conqueror's Terrorblade Breastplate. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Conqueror's Terrorblade Breastplate
Blizzard numbers items as they are created, so the named items next to ID 46123 (46118 to 46128) were usually added in the same batch as Conqueror's Terrorblade Breastplate: the same quest line, zone, vendor or reward set.