The game's collection data lists Meteoric Greathelm as sold by a vendor NPC in Valley of the Four Winds. The vendor stands at 12.0, 34.3 on the Valley of the Four Winds map.
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 5.5.4.69585 (Mists of Pandaria).
Read from the World of Warcraft client build files.
How Meteoric Greathelm Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Meteoric Greathelm suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Meteoric Greathelm is part of the transmog set Swarmbreaker's Battleplate (Warrior, Paladin and Death Knight only). The other 16 pieces:
2 other items in the current build are also called Meteoric Greathelm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 85179 (85174 to 85184) were usually added in the same batch as Meteoric Greathelm: the same quest line, zone, vendor or reward set.