Grievous Gladiator's Wyrmhide Helm is part of the transmog set Grievous Gladiator's Dragonhide Armor (Druid 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 Wyrmhide Helm Fits
Other Items Named Grievous Gladiator's Wyrmhide Helm
4 other items in the current build are also called Grievous Gladiator's Wyrmhide 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 Wyrmhide Helm
Blizzard numbers items as they are created, so the named items next to ID 100288 (100283 to 100293) were usually added in the same batch as Grievous Gladiator's Wyrmhide Helm: the same quest line, zone, vendor or reward set.