Grievous Gladiator's Mail Helm is part of the transmog set Grievous Gladiator's Ringmail Armor (Shaman only), which the Appearances collection lists in 2 versions. The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Grievous Gladiator's Mail Helm Fits
Other Items Named Grievous Gladiator's Mail Helm
4 other items in the current build are also called Grievous Gladiator's Mail Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Grievous Gladiator's Mail Helm
Blizzard numbers items as they are created, so the named items next to ID 100475 (100470 to 100480) were usually added in the same batch as Grievous Gladiator's Mail Helm: the same quest line, zone, vendor or reward set.