In Wrath of the Lich King it is item level 245 and requires level 80. In MoP Classic it is item level 225, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files.
How Valorous Siegebreaker Pauldrons Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Valorous Siegebreaker Pauldrons suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Valorous Siegebreaker Pauldrons is part of the transmog set Valorous Siegebreaker Battlegear (Warrior only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Valorous Siegebreaker Pauldrons Fits
Other Items Named Valorous Siegebreaker Pauldrons
1 other item in the current build is also called Valorous Siegebreaker Pauldrons. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Valorous Siegebreaker Pauldrons
Blizzard numbers items as they are created, so the named items next to ID 45428 (45423 to 45433) were usually added in the same batch as Valorous Siegebreaker Pauldrons: the same quest line, zone, vendor or reward set.