This item is acquired in-game. See its sources below.
A Rare Plate Head, item level 42, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Sha'tari Keeper Helm is listed as Quest. Appearance ID: 22238. 3 other items wear the same appearance:
Read from the World of Warcraft client build files.
4 quests list Sha'tari Keeper Helm among their rewards in Blizzard's quest data.
Auchenai Keeper Hood, 
Talador Sentinel Helm, 
Sha'tari Deadeye HelmAuchenai Keeper Hood, Sha'tari Deadeye Helm, Talador Sentinel HelmAuchenai Keeper Hood, Talador Sentinel Helm, Sha'tari Deadeye HelmAuchenai Keeper Hood, Sha'tari Deadeye Helm, Talador Sentinel HelmRead from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Sha'tari Keeper Helm suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Sha'tari Keeper Helm uses icon file 947378, which 16 other items also use. The 3 closest by item ID:
Voidgazer Headguard ID 112663 · Armor - Plate · item level 40Ruby Plate Greathelm ID 114266 · Armor - Plate · item level 42Stonebreaker Helm ID 106558 · Armor - Plate · item level 41Blizzard numbers items as they are created, so the named items next to ID 112520 (112515 to 112525) were usually added in the same batch as Sha'tari Keeper Helm: the same quest line, zone, vendor or reward set.
Talador Sentinel Boots ID 112515 · Armor - Leather · item level 42
Talador Sentinel Gloves ID 112516 · Armor - Leather · item level 42
Sha'tari Keeper Handguards ID 112517 · Armor - Plate · item level 42
Auchenai Keeper Gloves ID 112518 · Armor - Cloth · item level 42
Sha'tari Deadeye Gauntlets ID 112519 · Armor - Mail · item level 42Auchenai Keeper Hood ID 112521 · Armor - Cloth · item level 42Sha'tari Deadeye Helm ID 112522 · Armor - Mail · item level 42Talador Sentinel Helm ID 112523 · Armor - Leather · item level 42
Sha'tari Keeper Legguards ID 112524 · Armor - Plate · item level 41
Auchenai Keeper Leggings ID 112525 · Armor - Cloth · item level 41The raw ItemSparse values for item 112520 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB